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Nonlinear system

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1856: 1848: 1440:, the solution of which can be written as a time-dependent linear combination of sinusoids of differing frequencies; this makes solutions very flexible. It is often possible to find several very specific solutions to nonlinear equations, however the lack of a superposition principle prevents the construction of new solutions. 609:
behavior, it is in fact not random. For example, some aspects of the weather are seen to be chaotic, where simple changes in one part of the system produce complex effects throughout. This nonlinearity is one of the reasons why accurate long-term forecasts are impossible with current technology.
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can be simplified into one linear partial differential equation in the case of transient, laminar, one dimensional flow in a circular pipe; the scale analysis provides conditions under which the flow is laminar and one dimensional and also yields the simplified equation.
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The general root-finding algorithms apply to polynomial roots, but, generally they do not find all the roots, and when they fail to find a root, this does not imply that there is no roots. Specific methods for polynomials allow finding all roots or the
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This corresponds to a free fall problem. A very useful qualitative picture of the pendulum's dynamics may be obtained by piecing together such linearizations, as seen in the figure at right. Other techniques may be used to find (exact)
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are hidden by linearization. It follows that some aspects of the dynamic behavior of a nonlinear system can appear to be counterintuitive, unpredictable or even chaotic. Although such chaotic behavior may resemble
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is to change the variables (or otherwise transform the problem) so that the resulting problem is simpler (possibly linear). Sometimes, the equation may be transformed into one or more
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One of the greatest difficulties of nonlinear problems is that it is not generally possible to combine known solutions into new solutions. In linear problems, for example, a family of
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will usually grow without limit, though bounded solutions are possible. This corresponds to the difficulty of balancing a pendulum upright, it is literally an unstable state.
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that appear in them. Systems can be defined as nonlinear, regardless of whether known linear functions appear in the equations. In particular, a differential equation is
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and analysis procedures. These approaches can be used to study a wide class of complex nonlinear behaviors in the time, frequency, and spatio-temporal domains.
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Another way to approach the problem is to linearize any nonlinearity (the sine function term in this case) at the various points of interest through
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which is not a polynomial of degree one. In other words, in a nonlinear system of equations, the equation(s) to be solved cannot be written as a
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Mosconi, Francesco; Julou, Thomas; Desprat, Nicolas; Sinha, Deepak Kumar; Allemand, Jean-François; Vincent Croquette; Bensimon, David (2008).
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is the angle the pendulum forms with its rest position, as shown in the figure at right. One approach to "solving" this equation is to use
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Existence of solutions of Finite-Duration, which can happen under specific conditions for some non-linear ordinary differential equations.
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if it is linear in terms of the unknown function and its derivatives, even if nonlinear in terms of the other variables appearing in it.
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Korenberg, Michael J.; Hunter, Ian W. (March 1996). "The identification of nonlinear biological systems: Volterra kernel approaches".
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Billings S.A. "Nonlinear System Identification: NARMAX Methods in the Time, Frequency, and Spatio-Temporal Domains". Wiley, 2013
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is additive but not homogeneous. The conditions of additivity and homogeneity are often combined in the superposition principle
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A nonlinear system of equations consists of a set of equations in several variables such that at least one of them is not a
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As nonlinear dynamical equations are difficult to solve, nonlinear systems are commonly approximated by linear equations (
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and its variants. Generally they may provide a solution, but do not provide any information on the number of solutions.
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Second and higher order ordinary differential equations (more generally, systems of nonlinear equations) rarely yield
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Using a term like nonlinear science is like referring to the bulk of zoology as the study of non-elephant animals.
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This article is about "nonlinearity" in mathematics, physics and other sciences. For video and film editing, see
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corresponding to oscillations of the pendulum near the bottom of its path. Another linearization would be at
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Another common (though less mathematical) tactic, often exploited in fluid and heat mechanics, is to use
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Common methods for the qualitative analysis of nonlinear ordinary differential equations include:
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as a nonlinear function of preceding terms. Examples of nonlinear recurrence relations are the
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can be any sensible mathematical object (number, vector, function, etc.), and the function
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Mathematical Systems Theory I - Modelling, State Space Analysis, Stability and Robustness
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Gintautas, V. (2008). "Resonant forcing of nonlinear systems of differential equations".
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Mathematical Control Theory: Deterministic Finite Dimensional Systems. Second Edition
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A classic, extensively studied nonlinear problem is the dynamics of a frictionless
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For the general case of system of equations formed by equating to zero several
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Typically, the behavior of a nonlinear system is described in mathematics by a
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tends to infinity). The equation is nonlinear because it may be written as
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and using the methods outlined above for ordinary differential equations.
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de Canete, Javier, Cipriano Galindo, and Inmaculada Garcia-Moral (2011).
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System where changes of output are not proportional to changes of input
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System Engineering and Automation: An Interactive Educational Approach
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for the study of nonlinear systems. This term is disputed by others:
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and the left-hand side of the equation is not a linear function of
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The Center for Nonlinear Studies at Los Alamos National Laboratory
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New England Complex Systems Institute: Concepts in Complex Systems
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to the change of the input. Nonlinear problems are of interest to
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solutions can be used to construct general solutions through the
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since most systems are inherently nonlinear in nature. Nonlinear
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in which the unknowns (or the unknown functions in the case of
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to simplify a general, natural equation in a certain specific
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solutions, though implicit solutions and solutions involving
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is one which satisfies both of the following properties:
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corresponding to the limit of the general solution when
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One more interesting linearization is possible around
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The most common basic approach to studying nonlinear
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as a general solution (and also the special solution
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methods (can be applied to algebraic equations too)
1400: 807:{\displaystyle \textstyle f(\alpha x)=\alpha f(x).} 3498: 2722: 2657: 2591: 2553: 2516: 2482: 2456: 2409: 2337: 2307: 2281: 2240: 2174: 2141: 2097: 2006: 1972: 1949: 1763:Change of variables into something easier to study 1710: 1690: 1663: 1640: 1577: 1548: 1504: 1443: 1330: 1267: 1210: 1186: 1149: 1120: 1100: 1058: 1029: 995: 959: 918: 806: 749: 671: 565:of degree higher than one or in the argument of a 4001:List of nonlinear ordinary differential equations 3390:1985 24th IEEE Conference on Decision and Control 2457:{\displaystyle \sin(\theta )\approx \pi -\theta } 1781: 1372: 1225: 4588: 4006:List of nonlinear partial differential equations 1794:List of nonlinear partial differential equations 3383: 2984: 3996:List of linear ordinary differential equations 4118: 3599: 3151: 475: 3460:(fourth ed.). Oxford University Press. 3242:: CS1 maint: multiple names: authors list ( 2282:{\displaystyle \sin(\theta )\approx \theta } 750:{\displaystyle \textstyle f(x+y)=f(x)+f(y);} 3550:Command and Control Research Program (CCRP) 3455: 2700:– the presence of two or more stable states 2182:, called the small angle approximation, is 2108:which is an implicit solution involving an 1750:Examination of dissipative quantities (see 4125: 4111: 3613: 3606: 3592: 3419:David Tong: Lectures on Classical Dynamics 1389:and the relations that define the various 482: 468: 3458:Nonlinear Ordinary Differential Equations 3359: 3208: 3185: 3104: 3090: 2906:"Explained: Linear and nonlinear systems" 514:in which the change of the output is not 3493: 3278: 2490:. The solution to this problem involves 1854: 1846: 1641:{\displaystyle {\frac {du}{dx}}+u^{2}=0} 3279:Campbell, David K. (25 November 2004). 1788:Nonlinear partial differential equation 1505:{\displaystyle {\frac {du}{dx}}=-u^{2}} 1413:is said to be nonlinear if it is not a 1003:is a linear map (as defined above) and 817:Additivity implies homogeneity for any 4589: 3519: 3474: 3341: 3038:"Some nonlinear challenges in biology" 2592:{\displaystyle \sin(\theta )\approx 1} 1671:and its derivatives. Note that if the 4106: 3587: 1960:where gravity points "downwards" and 1275:many methods have been designed; see 3991:List of named differential equations 3386:"Finite Time Differential Equations" 3368: 2677:Types of nonlinear dynamic behaviors 2156:. For example, the linearization at 1829:Other methods include examining the 1821:. For example, the (very) nonlinear 4132: 3916:Method of undetermined coefficients 3697:Dependent and independent variables 3281:"Nonlinear physics: Fresh breather" 2483:{\displaystyle \theta \approx \pi } 1754:) analogous to conserved quantities 1718:, the problem would be linear (the 13: 4281:Evolutionary developmental biology 3426: 1549:{\displaystyle u={\frac {1}{x+C}}} 1237:For a single equation of the form 1007:otherwise. The equation is called 229:Evolutionary developmental biology 14: 4618: 3543: 3456:Jordan, D. W.; Smith, P. (2007). 3437:and Anthony J. Pritchard (2005). 3152:Stephenson, C.; et., al. (2017). 2706:– self-reinforcing solitary waves 553:, which is a set of simultaneous 3813:CarathĂ©odory's existence theorem 3575:) a Database of Physical Systems 3501:Advanced Engineering Mathematics 3215:. Berlin: Springer. p. 46. 2987:Annals of Biomedical Engineering 2782:Landau–Lifshitz–Gilbert equation 2308:{\displaystyle \theta \approx 0} 1401:Nonlinear differential equations 4415:Ordinary differential equations 3412: 3377: 3348:Journal of Symbolic Computation 3335: 3272: 2851:Aleksandr Mikhailovich Lyapunov 2772:Kadomtsev–Petviashvili equation 2723:Examples of nonlinear equations 2018:, which would eventually yield 1804:ordinary differential equations 1450:ordinary differential equations 1444:Ordinary differential equations 1395:nonlinear system identification 1352:systems of polynomial equations 396:Ordinary differential equations 4473:Partial differential equations 3250: 3202: 3145: 3084: 3029: 2978: 2946: 2922: 2898: 2806:Nonlinear Schrödinger equation 2580: 2574: 2554:{\displaystyle \theta =\pi /2} 2510: 2502: 2439: 2433: 2270: 2264: 2070: 2064: 1938: 1932: 1800:partial differential equations 1782:Partial differential equations 1452:are often exactly solvable by 1381:defines successive terms of a 1373:Nonlinear recurrence relations 1253: 1247: 1226:Nonlinear systems of equations 1181: 1175: 1144: 1138: 1089: 1083: 1053: 1047: 990: 984: 948: 942: 913: 907: 895: 889: 877: 859: 797: 791: 779: 770: 740: 734: 725: 719: 710: 698: 666: 660: 267:Partial differential equations 1: 2892: 1438:Dirichlet boundary conditions 633: 551:nonlinear system of equations 26:Nonlinearity (disambiguation) 3641:Notation for differentiation 2338:{\displaystyle \theta =\pi } 1859:Linearizations of a pendulum 1331:{\displaystyle x^{2}+x-1=0.} 33:Nonlinear Dynamics (journal) 7: 4223:Particle swarm optimization 3737:Exact differential equation 3560:Nonlinear Dynamics I: Chaos 3257:Nonlinear Dynamics I: Chaos 2963:10.1007/978-3-540-34153-6_7 2843: 2007:{\displaystyle d\theta /dt} 561:) appear as variables of a 116:Particle swarm optimization 10: 4623: 4468:Reaction-diffusion systems 4193:Self-organized criticality 3475:Khalil, Hassan K. (2001). 3062:10.1088/0951-7715/21/8/T03 2818:for unsaturated water flow 2777:Korteweg–de Vries equation 2730:Algebraic Riccati equation 2317:simple harmonic oscillator 1851:Illustration of a pendulum 1840: 1836: 1791: 1785: 1421:in fluid dynamics and the 1415:system of linear equations 613:Some authors use the term 263:Reaction–diffusion systems 92:Self-organized criticality 18: 4511: 4458: 4400: 4337: 4304: 4251:Artificial neural network 4236: 4161: 4140: 4047:JĂłzef Maria Hoene-WroĹ„ski 4027:Gottfried Wilhelm Leibniz 4014: 3983: 3893: 3826: 3818:Cauchy–Kowalevski theorem 3795: 3788: 3750: 3689: 3628: 3621: 3361:10.1016/j.jsc.2008.03.004 2673:and approximate periods. 2517:{\displaystyle |\theta |} 2175:{\displaystyle \theta =0} 204:Artificial neural network 22:Non-linear editing system 4329:Evolutionary game theory 4256:Evolutionary computation 4188:Collective consciousness 3941:Finite difference method 3384:Vardia T. Haimo (1985). 1698:term were replaced with 1423:Lotka–Volterra equations 1363:differentiable functions 1108:is very general in that 455:Evolutionary game theory 345:Second-order cybernetics 209:Evolutionary computation 125:Collective consciousness 4347:Social network analysis 4286:Artificial intelligence 4218:Ant colony optimization 4178:Collective intelligence 3921:Variation of parameters 3911:Separation of variables 3808:Peano existence theorem 3803:Picard–Lindelöf theorem 3690:Attributes of variables 3571: – (in 3569:Nonlinear Model Library 3398:10.1109/CDC.1985.268832 2822:Self-balancing unicycle 2792:Navier–Stokes equations 2142:{\displaystyle C_{0}=2} 1973:{\displaystyle \theta } 1867:under the influence of 1823:Navier-Stokes equations 1808:separation of variables 1731:nonelementary integrals 1454:separation of variables 1434:superposition principle 1419:Navier–Stokes equations 1268:{\displaystyle f(x)=0,} 1218:, the result will be a 929:An equation written as 685:superposition principle 233:Artificial intelligence 147:Social network analysis 112:Ant colony optimization 84:Collective intelligence 4478:Dissipative structures 4319:Rational choice theory 4082:Carl David TolmĂ© Runge 3656:Differential-algebraic 3615:Differential equations 3392:. pp. 1729–1733. 2955:The Nonlinear Universe 2832:Van der Pol oscillator 2762:Ginzburg–Landau theory 2659: 2593: 2555: 2518: 2484: 2458: 2411: 2339: 2309: 2283: 2242: 2176: 2143: 2116:(nonelementary unless 2114:nonelementary integral 2099: 2008: 1974: 1951: 1860: 1852: 1843:Pendulum (mathematics) 1819:boundary value problem 1712: 1692: 1665: 1642: 1579: 1550: 1506: 1411:differential equations 1332: 1277:Root-finding algorithm 1269: 1212: 1188: 1151: 1122: 1102: 1101:{\displaystyle f(x)=C} 1060: 1031: 997: 961: 960:{\displaystyle f(x)=C} 920: 808: 751: 673: 631: 559:differential equations 446:Rational choice theory 271:Dissipative structures 24:. For other uses, see 4291:Evolutionary robotics 4208:Agent-based modelling 4067:Augustin-Louis Cauchy 4062:Joseph-Louis Lagrange 3956:Finite element method 3946:Crank–Nicolson method 3880:Numerical integration 3859:Exponential stability 3751:Relation to processes 3636:Differential operator 2953:"Nonlinear Biology", 2660: 2594: 2556: 2519: 2485: 2459: 2412: 2340: 2310: 2284: 2243: 2177: 2144: 2100: 2009: 1975: 1952: 1858: 1850: 1713: 1693: 1691:{\displaystyle u^{2}} 1666: 1643: 1580: 1551: 1507: 1365:, the main method is 1333: 1270: 1220:differential equation 1213: 1189: 1157:can literally be any 1152: 1123: 1103: 1061: 1032: 998: 962: 921: 809: 752: 674: 619: 374:Theory of computation 237:Evolutionary robotics 104:Agent-based modelling 4450:Coupled map lattices 4410:Time series analysis 4352:Small-world networks 3961:Finite volume method 3885:Dirac delta function 3854:Asymptotic stability 3796:Existence/uniqueness 3661:Integro-differential 3564:MIT's OpenCourseWare 3435:Diederich Hinrichsen 3268:MIT's OpenCourseWare 2934:www.birmingham.ac.uk 2827:Sine-Gordon equation 2606: 2565: 2531: 2498: 2492:hyperbolic sinusoids 2468: 2424: 2352: 2323: 2293: 2255: 2189: 2160: 2120: 2025: 1984: 1964: 1886: 1873:Lagrangian mechanics 1742:conserved quantities 1702: 1675: 1655: 1596: 1578:{\displaystyle u=0,} 1560: 1519: 1463: 1430:linearly independent 1391:Hofstadter sequences 1297: 1279:. In the case where 1241: 1202: 1187:{\displaystyle f(x)} 1169: 1150:{\displaystyle f(x)} 1132: 1112: 1077: 1068:homogeneous function 1059:{\displaystyle f(x)} 1041: 1015: 996:{\displaystyle f(x)} 978: 936: 853: 826:continuous functions 763: 691: 672:{\displaystyle f(x)} 654: 425:Coupled map lattices 391:Time series analysis 151:Small-world networks 4607:Concepts in physics 4430:Population dynamics 4324:Bounded rationality 4266:Genetic programming 3971:Perturbation theory 3951:Runge–Kutta methods 3931:Integral transforms 3864:Rate of convergence 3760:(discrete analogue) 3441:. Springer Verlag. 3342:Lazard, D. (2009). 3297:2004Natur.432..455C 3170:2017NatSR...741621S 3115:2008Chaos..18c3118G 3054:2008Nonli..21..131M 1879:nonlinear equation 1746:Hamiltonian systems 1740:Examination of any 1379:recurrence relation 1345:real-root isolation 1290:polynomial equation 1030:{\displaystyle C=0} 450:Bounded rationality 408:Population dynamics 317:Conversation theory 217:Genetic programming 142:Scale-free networks 74:Collective behavior 4576:Computation theory 4571:Information theory 4526:Operationalization 4402:Nonlinear dynamics 4314:Prisoner's dilemma 4261:Genetic algorithms 4092:Sofya Kovalevskaya 3926:Integrating factor 3849:Lyapunov stability 3769:Stochastic partial 3262:2008-02-12 at the 2999:10.1007/bf02667354 2757:General relativity 2752:Colebrook equation 2747:Boltzmann equation 2743:for optimal policy 2655: 2589: 2551: 2514: 2480: 2454: 2407: 2335: 2305: 2279: 2238: 2172: 2139: 2095: 2016:integrating factor 2004: 1970: 1947: 1861: 1853: 1767:Bifurcation theory 1757:Linearization via 1708: 1688: 1661: 1638: 1575: 1546: 1502: 1328: 1265: 1208: 1184: 1147: 1118: 1098: 1056: 1027: 993: 957: 916: 804: 803: 747: 746: 669: 571:linear combination 441:Prisoner's dilemma 386:Nonlinear dynamics 341:Operationalization 337:Information theory 213:Genetic algorithms 4602:Dynamical systems 4597:Nonlinear systems 4584: 4583: 4488:Cellular automata 4460:Pattern formation 4392:Adaptive networks 4183:Collective action 4153:Self-organization 4100: 4099: 3979: 3978: 3784: 3783: 3534:978-0-387-98489-6 3512:978-0-471-15496-9 3486:978-0-13-067389-3 3479:. Prentice Hall. 3477:Nonlinear Systems 3467:978-0-19-920824-1 3291:(7016): 455–456. 3178:10.1038/srep41621 3123:10.1063/1.2964200 2866:Initial condition 2816:Richards equation 2767:Ishimori equation 2716:Self-oscillations 2641: 2387: 2224: 2154:Taylor expansions 2110:elliptic integral 2074: 2073: 1921: 1752:Lyapunov function 1733:are encountered. 1720:exponential decay 1711:{\displaystyle u} 1664:{\displaystyle u} 1617: 1544: 1484: 1211:{\displaystyle x} 1121:{\displaystyle x} 615:nonlinear science 540:dynamical systems 534:, and many other 508:non-linear system 492: 491: 279:Cellular automata 253:Pattern formation 184:Adaptive networks 88:Collective action 57:Self-organization 4614: 4498:Self-replication 4387:Dynamic networks 4276:Machine learning 4203:Phase transition 4127: 4120: 4113: 4104: 4103: 4077:Phyllis Nicolson 4057:Rudolf Lipschitz 3894:Solution methods 3869:Series solutions 3793: 3792: 3626: 3625: 3608: 3601: 3594: 3585: 3584: 3538: 3516: 3504: 3490: 3471: 3452: 3421: 3416: 3410: 3409: 3381: 3375: 3372: 3366: 3365: 3363: 3339: 3333: 3332: 3276: 3270: 3254: 3248: 3247: 3241: 3233: 3231: 3229: 3206: 3200: 3199: 3189: 3149: 3143: 3142: 3108: 3088: 3082: 3081: 3033: 3027: 3026: 2982: 2976: 2975: 2950: 2944: 2943: 2941: 2940: 2926: 2920: 2919: 2917: 2916: 2902: 2856:Dynamical system 2811:Power-flow study 2801:Nonlinear optics 2787:LiĂ©nard equation 2741:Bellman equation 2664: 2662: 2661: 2656: 2642: 2640: 2639: 2638: 2625: 2621: 2620: 2610: 2598: 2596: 2595: 2590: 2560: 2558: 2557: 2552: 2547: 2523: 2521: 2520: 2515: 2513: 2505: 2489: 2487: 2486: 2481: 2463: 2461: 2460: 2455: 2416: 2414: 2413: 2408: 2388: 2386: 2385: 2384: 2371: 2367: 2366: 2356: 2344: 2342: 2341: 2336: 2314: 2312: 2311: 2306: 2288: 2286: 2285: 2280: 2247: 2245: 2244: 2239: 2225: 2223: 2222: 2221: 2208: 2204: 2203: 2193: 2181: 2179: 2178: 2173: 2148: 2146: 2145: 2140: 2132: 2131: 2104: 2102: 2101: 2096: 2094: 2093: 2075: 2051: 2050: 2041: 2040: 2032: 2013: 2011: 2010: 2005: 1997: 1979: 1977: 1976: 1971: 1956: 1954: 1953: 1948: 1922: 1920: 1919: 1918: 1905: 1901: 1900: 1890: 1759:Taylor expansion 1744:, especially in 1717: 1715: 1714: 1709: 1697: 1695: 1694: 1689: 1687: 1686: 1670: 1668: 1667: 1662: 1647: 1645: 1644: 1639: 1631: 1630: 1618: 1616: 1608: 1600: 1584: 1582: 1581: 1576: 1555: 1553: 1552: 1547: 1545: 1543: 1529: 1511: 1509: 1508: 1503: 1501: 1500: 1485: 1483: 1475: 1467: 1337: 1335: 1334: 1329: 1309: 1308: 1282: 1274: 1272: 1271: 1266: 1217: 1215: 1214: 1209: 1198:with respect to 1193: 1191: 1190: 1185: 1156: 1154: 1153: 1148: 1127: 1125: 1124: 1119: 1107: 1105: 1104: 1099: 1065: 1063: 1062: 1057: 1036: 1034: 1033: 1028: 1002: 1000: 999: 994: 966: 964: 963: 958: 925: 923: 922: 917: 813: 811: 810: 805: 756: 754: 753: 748: 678: 676: 675: 670: 629: 504:nonlinear system 484: 477: 470: 361:Systems thinking 287:Self-replication 225:Machine learning 179:Dynamic networks 100:Phase transition 39: 38: 36: 29: 4622: 4621: 4617: 4616: 4615: 4613: 4612: 4611: 4587: 4586: 4585: 4580: 4546:System dynamics 4507: 4493:Spatial ecology 4454: 4396: 4382:Systems biology 4333: 4300: 4271:Artificial life 4241: 4232: 4228:Swarm behaviour 4213:Synchronization 4173:Social dynamics 4164: 4157: 4136: 4134:Complex systems 4131: 4101: 4096: 4037:Jacob Bernoulli 4010: 3975: 3966:Galerkin method 3889: 3827:Solution topics 3822: 3780: 3746: 3685: 3617: 3612: 3546: 3541: 3535: 3521:Sontag, Eduardo 3513: 3495:Kreyszig, Erwin 3487: 3468: 3449: 3429: 3427:Further reading 3424: 3417: 3413: 3382: 3378: 3373: 3369: 3340: 3336: 3305:10.1038/432455a 3277: 3273: 3264:Wayback Machine 3255: 3251: 3235: 3234: 3227: 3225: 3223: 3207: 3203: 3150: 3146: 3089: 3085: 3034: 3030: 2983: 2979: 2973: 2952: 2951: 2947: 2938: 2936: 2928: 2927: 2923: 2914: 2912: 2904: 2903: 2899: 2895: 2890: 2886:Volterra series 2846: 2841: 2837:Vlasov equation 2725: 2683:Amplitude death 2679: 2671:phase portraits 2634: 2630: 2626: 2616: 2612: 2611: 2609: 2607: 2604: 2603: 2566: 2563: 2562: 2561:, around which 2543: 2532: 2529: 2528: 2509: 2501: 2499: 2496: 2495: 2469: 2466: 2465: 2425: 2422: 2421: 2380: 2376: 2372: 2362: 2358: 2357: 2355: 2353: 2350: 2349: 2324: 2321: 2320: 2294: 2291: 2290: 2256: 2253: 2252: 2217: 2213: 2209: 2199: 2195: 2194: 2192: 2190: 2187: 2186: 2161: 2158: 2157: 2127: 2123: 2121: 2118: 2117: 2089: 2085: 2046: 2042: 2033: 2031: 2026: 2023: 2022: 1993: 1985: 1982: 1981: 1965: 1962: 1961: 1914: 1910: 1906: 1896: 1892: 1891: 1889: 1887: 1884: 1883: 1845: 1839: 1831:characteristics 1796: 1790: 1784: 1703: 1700: 1699: 1682: 1678: 1676: 1673: 1672: 1656: 1653: 1652: 1626: 1622: 1609: 1601: 1599: 1597: 1594: 1593: 1561: 1558: 1557: 1533: 1528: 1520: 1517: 1516: 1496: 1492: 1476: 1468: 1466: 1464: 1461: 1460: 1446: 1403: 1375: 1367:Newton's method 1304: 1300: 1298: 1295: 1294: 1280: 1242: 1239: 1238: 1232:linear equation 1228: 1203: 1200: 1199: 1196:differentiation 1170: 1167: 1166: 1163:boundary values 1133: 1130: 1129: 1113: 1110: 1109: 1078: 1075: 1074: 1073:The definition 1042: 1039: 1038: 1016: 1013: 1012: 979: 976: 975: 937: 934: 933: 854: 851: 850: 764: 761: 760: 692: 689: 688: 655: 652: 651: 648:linear function 636: 630: 625: 573:of the unknown 488: 459: 458: 457: 452: 448: 443: 438: 428: 427: 422: 418: 414: 410: 406: 402: 398: 393: 388: 378: 377: 376: 371: 367: 363: 359: 357:Systems science 355: 353:System dynamics 351: 347: 343: 339: 335: 331: 327: 323: 319: 314: 309: 295: 294: 289: 285: 283:Spatial ecology 281: 277: 273: 269: 265: 260: 255: 245: 244: 239: 235: 231: 227: 223: 221:Artificial life 219: 215: 211: 206: 201: 187: 186: 181: 177: 175:Systems biology 173: 169: 165: 161: 157: 153: 149: 144: 139: 129: 128: 127: 122: 120:Swarm behaviour 118: 114: 110: 108:Synchronization 106: 102: 98: 94: 90: 86: 81: 79:Social dynamics 76: 66: 65: 64: 59: 43:Complex systems 37: 30: 19: 17: 12: 11: 5: 4620: 4610: 4609: 4604: 4599: 4582: 4581: 4579: 4578: 4573: 4568: 4563: 4558: 4553: 4548: 4543: 4538: 4536:Self-reference 4533: 4528: 4523: 4517: 4515: 4513:Systems theory 4509: 4508: 4506: 4505: 4500: 4495: 4490: 4485: 4480: 4475: 4470: 4464: 4462: 4456: 4455: 4453: 4452: 4447: 4442: 4440:Multistability 4437: 4432: 4427: 4422: 4417: 4412: 4406: 4404: 4398: 4397: 4395: 4394: 4389: 4384: 4379: 4374: 4369: 4364: 4359: 4354: 4349: 4343: 4341: 4335: 4334: 4332: 4331: 4326: 4321: 4316: 4310: 4308: 4302: 4301: 4299: 4298: 4293: 4288: 4283: 4278: 4273: 4268: 4263: 4258: 4253: 4247: 4245: 4234: 4233: 4231: 4230: 4225: 4220: 4215: 4210: 4205: 4200: 4198:Herd mentality 4195: 4190: 4185: 4180: 4175: 4169: 4167: 4159: 4158: 4156: 4155: 4150: 4144: 4142: 4138: 4137: 4130: 4129: 4122: 4115: 4107: 4098: 4097: 4095: 4094: 4089: 4084: 4079: 4074: 4069: 4064: 4059: 4054: 4052:Ernst Lindelöf 4049: 4044: 4039: 4034: 4032:Leonhard Euler 4029: 4024: 4018: 4016: 4015:Mathematicians 4012: 4011: 4009: 4008: 4003: 3998: 3993: 3987: 3985: 3981: 3980: 3977: 3976: 3974: 3973: 3968: 3963: 3958: 3953: 3948: 3943: 3938: 3933: 3928: 3923: 3918: 3913: 3908: 3903: 3897: 3895: 3891: 3890: 3888: 3887: 3882: 3877: 3871: 3866: 3861: 3856: 3851: 3846: 3841: 3839:Phase portrait 3836: 3830: 3828: 3824: 3823: 3821: 3820: 3815: 3810: 3805: 3799: 3797: 3790: 3786: 3785: 3782: 3781: 3779: 3778: 3773: 3772: 3771: 3761: 3754: 3752: 3748: 3747: 3745: 3744: 3742:On jet bundles 3739: 3734: 3729: 3724: 3719: 3714: 3709: 3707:Nonhomogeneous 3704: 3699: 3693: 3691: 3687: 3686: 3684: 3683: 3678: 3673: 3668: 3663: 3658: 3653: 3648: 3643: 3638: 3632: 3630: 3623: 3622:Classification 3619: 3618: 3611: 3610: 3603: 3596: 3588: 3582: 3581: 3576: 3566: 3557: 3552: 3545: 3544:External links 3542: 3540: 3539: 3533: 3517: 3511: 3491: 3485: 3472: 3466: 3453: 3447: 3430: 3428: 3425: 3423: 3422: 3411: 3376: 3367: 3354:(3): 222–231. 3334: 3271: 3249: 3222:978-3642202292 3221: 3201: 3144: 3083: 3028: 2993:(2): 250–268. 2977: 2971: 2945: 2921: 2896: 2894: 2891: 2889: 2888: 2883: 2881:Vector soliton 2878: 2873: 2868: 2863: 2858: 2853: 2847: 2845: 2842: 2840: 2839: 2834: 2829: 2824: 2819: 2813: 2808: 2803: 2798: 2796:fluid dynamics 2789: 2784: 2779: 2774: 2769: 2764: 2759: 2754: 2749: 2744: 2738: 2732: 2726: 2724: 2721: 2720: 2719: 2713: 2707: 2701: 2698:Multistability 2695: 2686: 2678: 2675: 2666: 2665: 2654: 2651: 2648: 2645: 2637: 2633: 2629: 2624: 2619: 2615: 2588: 2585: 2582: 2579: 2576: 2573: 2570: 2550: 2546: 2542: 2539: 2536: 2512: 2508: 2504: 2479: 2476: 2473: 2453: 2450: 2447: 2444: 2441: 2438: 2435: 2432: 2429: 2418: 2417: 2406: 2403: 2400: 2397: 2394: 2391: 2383: 2379: 2375: 2370: 2365: 2361: 2334: 2331: 2328: 2304: 2301: 2298: 2278: 2275: 2272: 2269: 2266: 2263: 2260: 2249: 2248: 2237: 2234: 2231: 2228: 2220: 2216: 2212: 2207: 2202: 2198: 2171: 2168: 2165: 2138: 2135: 2130: 2126: 2106: 2105: 2092: 2088: 2084: 2081: 2078: 2072: 2069: 2066: 2063: 2060: 2057: 2054: 2049: 2045: 2039: 2036: 2030: 2003: 2000: 1996: 1992: 1989: 1969: 1958: 1957: 1946: 1943: 1940: 1937: 1934: 1931: 1928: 1925: 1917: 1913: 1909: 1904: 1899: 1895: 1841:Main article: 1838: 1835: 1815:scale analysis 1786:Main article: 1783: 1780: 1779: 1778: 1775: 1769: 1764: 1761: 1755: 1748: 1707: 1685: 1681: 1660: 1649: 1648: 1637: 1634: 1629: 1625: 1621: 1615: 1612: 1607: 1604: 1574: 1571: 1568: 1565: 1542: 1539: 1536: 1532: 1527: 1524: 1513: 1512: 1499: 1495: 1491: 1488: 1482: 1479: 1474: 1471: 1445: 1442: 1402: 1399: 1374: 1371: 1327: 1324: 1321: 1318: 1315: 1312: 1307: 1303: 1264: 1261: 1258: 1255: 1252: 1249: 1246: 1227: 1224: 1207: 1183: 1180: 1177: 1174: 1146: 1143: 1140: 1137: 1117: 1097: 1094: 1091: 1088: 1085: 1082: 1055: 1052: 1049: 1046: 1026: 1023: 1020: 992: 989: 986: 983: 968: 967: 956: 953: 950: 947: 944: 941: 927: 926: 915: 912: 909: 906: 903: 900: 897: 894: 891: 888: 885: 882: 879: 876: 873: 870: 867: 864: 861: 858: 844:antilinear map 815: 814: 802: 799: 796: 793: 790: 787: 784: 781: 778: 775: 772: 769: 757: 745: 742: 739: 736: 733: 730: 727: 724: 721: 718: 715: 712: 709: 706: 703: 700: 697: 683:Additivity or 668: 665: 662: 659: 635: 632: 627:StanisĹ‚aw Ulam 623: 544:linear systems 532:mathematicians 490: 489: 487: 486: 479: 472: 464: 461: 460: 439: 434: 433: 430: 429: 416:Multistability 389: 384: 383: 380: 379: 349:Self-reference 310: 303:Systems theory 301: 300: 297: 296: 256: 251: 250: 247: 246: 202: 193: 192: 189: 188: 140: 135: 134: 131: 130: 96:Herd mentality 77: 72: 71: 68: 67: 60: 55: 54: 51: 50: 46: 45: 15: 9: 6: 4: 3: 2: 4619: 4608: 4605: 4603: 4600: 4598: 4595: 4594: 4592: 4577: 4574: 4572: 4569: 4567: 4564: 4562: 4559: 4557: 4554: 4552: 4549: 4547: 4544: 4542: 4541:Goal-oriented 4539: 4537: 4534: 4532: 4529: 4527: 4524: 4522: 4519: 4518: 4516: 4514: 4510: 4504: 4503:Geomorphology 4501: 4499: 4496: 4494: 4491: 4489: 4486: 4484: 4481: 4479: 4476: 4474: 4471: 4469: 4466: 4465: 4463: 4461: 4457: 4451: 4448: 4446: 4443: 4441: 4438: 4436: 4433: 4431: 4428: 4426: 4423: 4421: 4418: 4416: 4413: 4411: 4408: 4407: 4405: 4403: 4399: 4393: 4390: 4388: 4385: 4383: 4380: 4378: 4375: 4373: 4370: 4368: 4365: 4363: 4360: 4358: 4355: 4353: 4350: 4348: 4345: 4344: 4342: 4340: 4336: 4330: 4327: 4325: 4322: 4320: 4317: 4315: 4312: 4311: 4309: 4307: 4303: 4297: 4294: 4292: 4289: 4287: 4284: 4282: 4279: 4277: 4274: 4272: 4269: 4267: 4264: 4262: 4259: 4257: 4254: 4252: 4249: 4248: 4246: 4244: 4239: 4235: 4229: 4226: 4224: 4221: 4219: 4216: 4214: 4211: 4209: 4206: 4204: 4201: 4199: 4196: 4194: 4191: 4189: 4186: 4184: 4181: 4179: 4176: 4174: 4171: 4170: 4168: 4166: 4160: 4154: 4151: 4149: 4146: 4145: 4143: 4139: 4135: 4128: 4123: 4121: 4116: 4114: 4109: 4108: 4105: 4093: 4090: 4088: 4085: 4083: 4080: 4078: 4075: 4073: 4070: 4068: 4065: 4063: 4060: 4058: 4055: 4053: 4050: 4048: 4045: 4043: 4040: 4038: 4035: 4033: 4030: 4028: 4025: 4023: 4020: 4019: 4017: 4013: 4007: 4004: 4002: 3999: 3997: 3994: 3992: 3989: 3988: 3986: 3982: 3972: 3969: 3967: 3964: 3962: 3959: 3957: 3954: 3952: 3949: 3947: 3944: 3942: 3939: 3937: 3934: 3932: 3929: 3927: 3924: 3922: 3919: 3917: 3914: 3912: 3909: 3907: 3904: 3902: 3899: 3898: 3896: 3892: 3886: 3883: 3881: 3878: 3875: 3872: 3870: 3867: 3865: 3862: 3860: 3857: 3855: 3852: 3850: 3847: 3845: 3842: 3840: 3837: 3835: 3832: 3831: 3829: 3825: 3819: 3816: 3814: 3811: 3809: 3806: 3804: 3801: 3800: 3798: 3794: 3791: 3787: 3777: 3774: 3770: 3767: 3766: 3765: 3762: 3759: 3756: 3755: 3753: 3749: 3743: 3740: 3738: 3735: 3733: 3730: 3728: 3725: 3723: 3720: 3718: 3715: 3713: 3710: 3708: 3705: 3703: 3700: 3698: 3695: 3694: 3692: 3688: 3682: 3679: 3677: 3674: 3672: 3669: 3667: 3664: 3662: 3659: 3657: 3654: 3652: 3649: 3647: 3644: 3642: 3639: 3637: 3634: 3633: 3631: 3627: 3624: 3620: 3616: 3609: 3604: 3602: 3597: 3595: 3590: 3589: 3586: 3580: 3577: 3574: 3570: 3567: 3565: 3561: 3558: 3556: 3553: 3551: 3548: 3547: 3536: 3530: 3526: 3522: 3518: 3514: 3508: 3503: 3502: 3496: 3492: 3488: 3482: 3478: 3473: 3469: 3463: 3459: 3454: 3450: 3448:9783540441250 3444: 3440: 3436: 3432: 3431: 3420: 3415: 3407: 3403: 3399: 3395: 3391: 3387: 3380: 3371: 3362: 3357: 3353: 3349: 3345: 3338: 3330: 3326: 3322: 3318: 3314: 3310: 3306: 3302: 3298: 3294: 3290: 3286: 3282: 3275: 3269: 3265: 3261: 3258: 3253: 3245: 3239: 3224: 3218: 3214: 3213: 3205: 3197: 3193: 3188: 3183: 3179: 3175: 3171: 3167: 3163: 3159: 3155: 3148: 3140: 3136: 3132: 3128: 3124: 3120: 3116: 3112: 3107: 3102: 3099:(3): 033118. 3098: 3094: 3087: 3079: 3075: 3071: 3067: 3063: 3059: 3055: 3051: 3047: 3043: 3039: 3032: 3024: 3020: 3016: 3012: 3008: 3004: 3000: 2996: 2992: 2988: 2981: 2974: 2972:9783540341529 2968: 2964: 2960: 2956: 2949: 2935: 2931: 2925: 2911: 2907: 2901: 2897: 2887: 2884: 2882: 2879: 2877: 2876:Mode coupling 2874: 2872: 2871:Linear system 2869: 2867: 2864: 2862: 2859: 2857: 2854: 2852: 2849: 2848: 2838: 2835: 2833: 2830: 2828: 2825: 2823: 2820: 2817: 2814: 2812: 2809: 2807: 2804: 2802: 2799: 2797: 2793: 2790: 2788: 2785: 2783: 2780: 2778: 2775: 2773: 2770: 2768: 2765: 2763: 2760: 2758: 2755: 2753: 2750: 2748: 2745: 2742: 2739: 2736: 2735:Ball and beam 2733: 2731: 2728: 2727: 2717: 2714: 2711: 2708: 2705: 2702: 2699: 2696: 2694: 2690: 2687: 2684: 2681: 2680: 2674: 2672: 2652: 2649: 2646: 2643: 2635: 2631: 2627: 2622: 2617: 2613: 2602: 2601: 2600: 2586: 2583: 2577: 2571: 2568: 2548: 2544: 2540: 2537: 2534: 2525: 2506: 2493: 2477: 2474: 2471: 2451: 2448: 2445: 2442: 2436: 2430: 2427: 2404: 2401: 2398: 2395: 2392: 2389: 2381: 2377: 2373: 2368: 2363: 2359: 2348: 2347: 2346: 2332: 2329: 2326: 2318: 2302: 2299: 2296: 2276: 2273: 2267: 2261: 2258: 2235: 2232: 2229: 2226: 2218: 2214: 2210: 2205: 2200: 2196: 2185: 2184: 2183: 2169: 2166: 2163: 2155: 2150: 2136: 2133: 2128: 2124: 2115: 2111: 2090: 2086: 2082: 2079: 2076: 2067: 2061: 2058: 2055: 2052: 2047: 2043: 2037: 2034: 2028: 2021: 2020: 2019: 2017: 2001: 1998: 1994: 1990: 1987: 1967: 1944: 1941: 1935: 1929: 1926: 1923: 1915: 1911: 1907: 1902: 1897: 1893: 1882: 1881: 1880: 1878: 1877:dimensionless 1874: 1870: 1866: 1857: 1849: 1844: 1834: 1832: 1827: 1824: 1820: 1816: 1811: 1809: 1806:, as seen in 1805: 1801: 1795: 1789: 1776: 1773: 1770: 1768: 1765: 1762: 1760: 1756: 1753: 1749: 1747: 1743: 1739: 1738: 1737: 1734: 1732: 1728: 1723: 1721: 1705: 1683: 1679: 1658: 1635: 1632: 1627: 1623: 1619: 1613: 1610: 1605: 1602: 1592: 1591: 1590: 1588: 1572: 1569: 1566: 1563: 1540: 1537: 1534: 1530: 1525: 1522: 1497: 1493: 1489: 1486: 1480: 1477: 1472: 1469: 1459: 1458: 1457: 1455: 1451: 1441: 1439: 1435: 1431: 1426: 1424: 1420: 1416: 1412: 1408: 1398: 1396: 1392: 1388: 1384: 1380: 1370: 1368: 1364: 1359: 1357: 1353: 1348: 1346: 1342: 1325: 1322: 1319: 1316: 1313: 1310: 1305: 1301: 1292: 1291: 1286: 1278: 1262: 1259: 1256: 1250: 1244: 1235: 1233: 1223: 1221: 1205: 1197: 1178: 1172: 1164: 1160: 1141: 1135: 1115: 1095: 1092: 1086: 1080: 1071: 1069: 1050: 1044: 1024: 1021: 1018: 1010: 1006: 987: 981: 973: 954: 951: 945: 939: 932: 931: 930: 910: 904: 901: 898: 892: 886: 883: 880: 874: 871: 868: 865: 862: 856: 849: 848: 847: 845: 841: 838: 834: 831: 827: 823: 820: 800: 794: 788: 785: 782: 776: 773: 767: 759:Homogeneity: 758: 743: 737: 731: 728: 722: 716: 713: 707: 704: 701: 695: 686: 682: 681: 680: 663: 657: 649: 645: 641: 628: 622: 618: 616: 611: 608: 603: 602:singularities 599: 595: 591: 590:linearization 586: 584: 580: 576: 572: 568: 564: 560: 556: 552: 547: 545: 541: 537: 533: 529: 525: 521: 517: 513: 509: 505: 501: 497: 485: 480: 478: 473: 471: 466: 465: 463: 462: 456: 453: 451: 447: 442: 437: 432: 431: 426: 423: 421: 417: 413: 409: 405: 401: 397: 392: 387: 382: 381: 375: 372: 370: 366: 362: 358: 354: 350: 346: 342: 338: 334: 330: 329:Goal-oriented 326: 322: 318: 313: 308: 304: 299: 298: 293: 292:Geomorphology 290: 288: 284: 280: 276: 272: 268: 264: 259: 254: 249: 248: 243: 240: 238: 234: 230: 226: 222: 218: 214: 210: 205: 200: 196: 191: 190: 185: 182: 180: 176: 172: 168: 164: 160: 156: 152: 148: 143: 138: 133: 132: 126: 123: 121: 117: 113: 109: 105: 101: 97: 93: 89: 85: 80: 75: 70: 69: 63: 58: 53: 52: 48: 47: 44: 41: 40: 34: 27: 23: 4367:Graph theory 4296:Evolvability 4087:Martin Kutta 4042:Émile Picard 4022:Isaac Newton 3936:Euler method 3906:Substitution 3527:. Springer. 3524: 3500: 3476: 3457: 3438: 3414: 3389: 3379: 3370: 3351: 3347: 3337: 3288: 3284: 3274: 3252: 3226:. Retrieved 3211: 3204: 3161: 3157: 3147: 3096: 3092: 3086: 3045: 3042:Nonlinearity 3041: 3031: 2990: 2986: 2980: 2954: 2948: 2937:. Retrieved 2933: 2924: 2913:. Retrieved 2909: 2900: 2710:Limit cycles 2667: 2526: 2419: 2315:. This is a 2250: 2151: 2107: 1959: 1862: 1828: 1812: 1797: 1772:Perturbation 1735: 1724: 1650: 1586: 1514: 1448:First order 1447: 1427: 1425:in biology. 1404: 1387:logistic map 1377:A nonlinear 1376: 1360: 1358:algorithms. 1356:Gröbner base 1349: 1288: 1287:, one has a 1236: 1229: 1072: 1008: 1004: 971: 969: 928: 839: 832: 821: 816: 647: 637: 620: 614: 612: 587: 582: 550: 548: 516:proportional 507: 503: 493: 444: 394: 385: 315: 261: 242:Evolvability 207: 163:Graph theory 145: 82: 4566:Autopoiesis 4561:Cybernetics 4551:Sensemaking 4521:Homeostasis 4483:Percolation 4445:Bifurcation 4420:Phase space 4306:Game theory 4163:Collective 3844:Phase space 3702:Homogeneous 3048:(8): T131. 1727:closed-form 1343:roots; see 1009:homogeneous 824:, and, for 640:mathematics 496:mathematics 436:Game theory 420:Bifurcation 400:Phase space 365:Sensemaking 333:Homeostasis 312:Autopoiesis 307:cybernetics 275:Percolation 4591:Categories 4377:Robustness 4357:Centrality 4243:adaptation 4141:Background 4072:John Crank 3901:Inspection 3764:Stochastic 3758:Difference 3732:Autonomous 3676:Non-linear 3666:Fractional 3629:Operations 3228:20 January 2939:2018-06-30 2915:2018-06-30 2893:References 1792:See also: 1722:problem). 1285:polynomial 970:is called 828:, for any 644:linear map 634:Definition 563:polynomial 536:scientists 528:physicists 524:biologists 404:Attractors 199:adaptation 171:Robustness 155:Centrality 4425:Attractor 4238:Evolution 4148:Emergence 3876:solutions 3834:Wronskian 3789:Solutions 3717:Decoupled 3681:Holonomic 3505:. Wiley. 3313:0028-0836 3238:cite book 3164:: 41621. 3106:0803.2252 3078:119808230 3070:0951-7715 3007:0090-6964 2693:aperiodic 2623:θ 2584:≈ 2578:θ 2572:⁡ 2541:π 2535:θ 2507:θ 2478:π 2475:≈ 2472:θ 2452:θ 2449:− 2446:π 2443:≈ 2437:θ 2431:⁡ 2399:θ 2396:− 2393:π 2369:θ 2333:π 2327:θ 2300:≈ 2297:θ 2277:θ 2274:≈ 2268:θ 2262:⁡ 2230:θ 2206:θ 2164:θ 2068:θ 2062:⁡ 2038:θ 2029:∫ 1991:θ 1968:θ 1936:θ 1930:⁡ 1903:θ 1490:− 1317:− 1194:contains 1005:nonlinear 902:β 884:α 872:β 863:α 786:α 774:α 579:functions 575:variables 555:equations 520:engineers 195:Evolution 62:Emergence 4531:Feedback 4339:Networks 4165:behavior 3984:Examples 3874:Integral 3646:Ordinary 3523:(1998). 3497:(1998). 3406:45426376 3321:15565139 3260:Archived 3196:28155863 3158:Sci. Rep 3139:18345817 3131:19045456 3023:20643206 2910:MIT News 2861:Feedback 2844:See also 2704:Solitons 1871:. Using 1865:pendulum 1383:sequence 1350:Solving 1293:such as 835:. 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Index

Non-linear editing system
Nonlinearity (disambiguation)
Nonlinear Dynamics (journal)
Complex systems
Self-organization
Emergence
Collective behavior
Social dynamics
Collective intelligence
Collective action
Self-organized criticality
Herd mentality
Phase transition
Agent-based modelling
Synchronization
Ant colony optimization
Particle swarm optimization
Swarm behaviour
Collective consciousness
Networks
Scale-free networks
Social network analysis
Small-world networks
Centrality
Motifs
Graph theory
Scaling
Robustness
Systems biology
Dynamic networks

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