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DSPACE

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29: 905: 1717: 629: 1837: 1344:, that is, smaller than the size of the input. Thus, "charging" the algorithm for the size of the input, or for the size of the output, would not truly capture the memory space used. This is solved by defining the 1323: 1345: 1238: 986: 506: 1444: 1348:, which is a standard multi-tape Turing machine, except that the input tape may never be written-to, and the output tape may never be read from. This allows smaller space classes, such as 1066: 1026: 356: 613: 575: 399: 1520: 1482: 1563: 900:{\displaystyle |S|\leq |{\mathcal {C}}|^{|{\mathcal {C}}|}\leq (2^{c.s(n)})^{2^{c.s(n)}}=2^{c.s(n).2^{c.s(n)}}<2^{2^{2c.s(n)}}=2^{2^{o(\log \log n)}}=o(n)} 1352:(logarithmic space), to be defined in terms of the amount of space used by all of the work tapes (excluding the special input and output tapes). 1745: 1248: 1993: 1170: 925: 428: 1927: 1901: 1546: 142: 524: 2355: 112: 93: 1413: 2390: 1986: 1893: 1550: 65: 126: 149:. It represents the total amount of memory space that a "normal" physical computer would need to solve a given 50: 72: 1408: 1337: 1139: 1031: 991: 202: 146: 2395: 1979: 615:
possibilities for every element of a crossing sequence, so the number of different crossing sequences of
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Since many symbols might be packed into one by taking a suitable power of the alphabet, for all
2314: 138: 2309: 2304: 1487: 1449: 150: 2299: 1712:{\displaystyle {\mathsf {DSPACE}}\subseteq {\mathsf {NSPACE}}\subseteq {\mathsf {DSPACE}}.} 1554: 911: 221:
that can be used, though there may be restrictions on some other complexity measures (like
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that can be solved using a certain amount of memory space. For each function
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be an input of smallest size, denoted by n, that requires more space than
2151: 2061: 1832:{\displaystyle {\mathsf {NTIME}}(t(n))\subseteq {\mathsf {DSPACE}}(t(n))} 1318:{\displaystyle \bigcup _{k\in \mathbb {N} }{\mathsf {DSPACE}}(2^{n^{k}})} 2263: 2088: 577:: if it is longer than that, then some configuration will repeat, and 2258: 1971: 1341: 1233:{\displaystyle \bigcup _{k\in \mathbb {N} }{\mathsf {DSPACE}}(n^{k})} 154: 28: 2253: 2248: 2193: 2016: 1242: 2243: 2350: 2220: 2203: 1541: 1164: 17: 1383:) space is the same as the class of languages recognizable in 2340: 2335: 2156: 1723: 228:
Several important complexity classes are defined in terms of
2168: 2026: 1446:, there exists some language L which is decidable in space 981:{\displaystyle {\mathcal {C}}_{i}(x)={\mathcal {C}}_{j}(x)} 2183: 2115: 2110: 2031: 2021: 1531: 501:{\displaystyle |{\mathcal {C}}|\leq 2^{c.s(n)}=o(\log n)} 267:
space is required to recognize any non-regular language).
581:
will go into an infinite loop. There are also at most
1748: 1566: 1490: 1452: 1416: 1251: 1173: 1034: 994: 928: 632: 587: 549: 431: 383: 336: 1727:is related to DSPACE in the following way. For any 53:. Unsourced material may be challenged and removed. 1831: 1711: 1514: 1476: 1438: 1340:. Several important space complexity classes are 1317: 1232: 1060: 1020: 980: 899: 607: 569: 500: 393: 350: 535:. Note that the length of a crossing sequence of 274:Suppose that there exists a non-regular language 2382: 1868:Space complexity of alternating Turing machines 1346:multi-tape Turing machine with input and output 1138:The above theorem implies the necessity of the 1439:{\displaystyle f:\mathbb {N} \to \mathbb {N} } 1131:. Hence, there does not exist such a language 217:)). There is no restriction on the amount of 1987: 1887: 1099:still behaves exactly the same way on input 1916:Computational complexity. A modern approach 1994: 1980: 1910: 1890:Turing Machines with Sublogarithmic Space 1432: 1424: 1375:, the class of languages recognizable in 1264: 1186: 344: 113:Learn how and when to remove this message 1107:, so it needs the same space to compute 1865: 1068:are the crossing sequences at boundary 2383: 2001: 1806: 1803: 1800: 1797: 1794: 1791: 1763: 1760: 1757: 1754: 1751: 1670: 1667: 1664: 1661: 1658: 1655: 1627: 1624: 1621: 1618: 1615: 1612: 1584: 1581: 1578: 1575: 1572: 1569: 1532:Relation with other complexity classes 1287: 1284: 1281: 1278: 1275: 1272: 1209: 1206: 1203: 1200: 1197: 1194: 1975: 1061:{\displaystyle {\mathcal {C}}_{j}(x)} 1021:{\displaystyle {\mathcal {C}}_{i}(x)} 160: 1539:is the deterministic counterpart of 1398: 51:adding citations to reliable sources 22: 1873: 1850: 13: 1127:, contradicting the definition of 1038: 998: 958: 932: 675: 656: 595: 557: 439: 386: 14: 2407: 2356:Probabilistically checkable proof 1945: 1391:) space. This justifies usage of 1328: 351:{\displaystyle k\in \mathbb {N} } 1551:non-deterministic Turing machine 608:{\displaystyle |{\mathcal {C}}|} 570:{\displaystyle |{\mathcal {C}}|} 27: 1894:Springer Science+Business Media 1336:is traditionally measured on a 523:denote the set of all possible 127:computational complexity theory 38:needs additional citations for 1888:Szepietowski, Andrzej (1994). 1879:Arora & Barak (2009) p. 86 1859: 1826: 1823: 1817: 1811: 1783: 1780: 1774: 1768: 1703: 1694: 1690: 1684: 1678: 1675: 1647: 1644: 1638: 1632: 1604: 1601: 1595: 1589: 1509: 1506: 1500: 1494: 1471: 1468: 1462: 1456: 1428: 1312: 1292: 1227: 1214: 1055: 1049: 1015: 1009: 975: 969: 949: 943: 894: 888: 875: 857: 834: 828: 796: 790: 773: 767: 743: 737: 719: 713: 707: 690: 681: 669: 663: 650: 642: 634: 601: 589: 563: 551: 495: 483: 472: 466: 445: 433: 394:{\displaystyle {\mathcal {C}}} 330:(1)); thus, for any arbitrary 16:For digital repositories, see 1: 1843: 1409:space-constructible function 1338:deterministic Turing machine 1140:space-constructible function 1083:be the string obtained from 203:deterministic Turing machine 147:deterministic Turing machine 7: 1087:by removing all cells from 512:is a constant depending on 358:, there exists an input of 141:describing the resource of 10: 2412: 2372:List of complexity classes 1920:Cambridge University Press 1524: 362:requiring more space than 15: 2369: 2328: 2292: 2236: 2129: 2009: 1856:Szepietowski (1994) p. 28 2361:Interactive proof system 251:. In fact, REG = DSPACE( 201:that can be solved by a 2391:Computational resources 1866:Alberts, Maris (1985), 1527:space hierarchy theorem 1515:{\displaystyle o(f(n))} 1477:{\displaystyle O(f(n))} 1405:space hierarchy theorem 1144:space hierarchy theorem 2315:Arithmetical hierarchy 1914:; Barak, Boaz (2009). 1833: 1713: 1516: 1478: 1440: 1407:shows that, for every 1319: 1234: 1062: 1022: 982: 914:, there exist indexes 901: 609: 571: 502: 395: 352: 139:computational resource 2310:Grzegorczyk hierarchy 2305:Exponential hierarchy 2237:Considered infeasible 1834: 1714: 1525:Further information: 1517: 1479: 1441: 1320: 1235: 1063: 1023: 983: 902: 610: 572: 503: 396: 353: 322:). By our assumption 173:, sets of all of the 151:computational problem 2300:Polynomial hierarchy 2130:Suspected infeasible 1746: 1564: 1488: 1450: 1414: 1249: 1171: 1032: 992: 926: 912:pigeonhole principle 630: 585: 547: 429: 381: 334: 261:Ω(log log  47:improve this article 2329:Families of classes 2010:Considered feasible 1395:in the definition. 255:(log log  2396:Complexity classes 2003:Complexity classes 1829: 1729:time constructible 1709: 1512: 1474: 1436: 1315: 1269: 1230: 1191: 1142:assumption in the 1058: 1018: 978: 897: 605: 567: 525:crossing sequences 498: 401:be the set of all 391: 348: 171:complexity classes 169:is used to define 161:Complexity classes 2378: 2377: 2320:Boolean hierarchy 2293:Class hierarchies 1929:978-0-521-42426-4 1903:978-3-540-58355-4 1555:Savitch's theorem 1484:but not in space 1399:Hierarchy theorem 1252: 1174: 249:regular languages 232:. These include: 199:decision problems 175:decision problems 123: 122: 115: 97: 2403: 1996: 1989: 1982: 1973: 1972: 1941: 1907: 1880: 1877: 1871: 1870: 1863: 1857: 1854: 1838: 1836: 1835: 1830: 1810: 1809: 1767: 1766: 1718: 1716: 1715: 1710: 1702: 1701: 1674: 1673: 1631: 1630: 1588: 1587: 1521: 1519: 1518: 1513: 1483: 1481: 1480: 1475: 1445: 1443: 1442: 1437: 1435: 1427: 1324: 1322: 1321: 1316: 1311: 1310: 1309: 1308: 1291: 1290: 1268: 1267: 1239: 1237: 1236: 1231: 1226: 1225: 1213: 1212: 1190: 1189: 1134: 1130: 1126: 1114: 1110: 1106: 1102: 1098: 1086: 1082: 1076:, respectively. 1067: 1065: 1064: 1059: 1048: 1047: 1042: 1041: 1027: 1025: 1024: 1019: 1008: 1007: 1002: 1001: 987: 985: 984: 979: 968: 967: 962: 961: 942: 941: 936: 935: 906: 904: 903: 898: 881: 880: 879: 878: 840: 839: 838: 837: 802: 801: 800: 799: 749: 748: 747: 746: 717: 716: 686: 685: 684: 679: 678: 672: 666: 660: 659: 653: 645: 637: 614: 612: 611: 606: 604: 599: 598: 592: 576: 574: 573: 568: 566: 561: 560: 554: 507: 505: 504: 499: 476: 475: 448: 443: 442: 436: 400: 398: 397: 392: 390: 389: 357: 355: 354: 349: 347: 266: 247:is the class of 219:computation time 187:complexity class 118: 111: 107: 104: 98: 96: 55: 31: 23: 2411: 2410: 2406: 2405: 2404: 2402: 2401: 2400: 2381: 2380: 2379: 2374: 2365: 2324: 2288: 2232: 2226:PSPACE-complete 2125: 2005: 2000: 1948: 1930: 1904: 1884: 1883: 1878: 1874: 1864: 1860: 1855: 1851: 1846: 1790: 1789: 1750: 1749: 1747: 1744: 1743: 1697: 1693: 1654: 1653: 1611: 1610: 1568: 1567: 1565: 1562: 1561: 1557:, we have that 1545:, the class of 1534: 1529: 1489: 1486: 1485: 1451: 1448: 1447: 1431: 1423: 1415: 1412: 1411: 1401: 1331: 1304: 1300: 1299: 1295: 1271: 1270: 1263: 1256: 1250: 1247: 1246: 1221: 1217: 1193: 1192: 1185: 1178: 1172: 1169: 1168: 1132: 1128: 1116: 1112: 1108: 1104: 1100: 1096: 1084: 1080: 1043: 1037: 1036: 1035: 1033: 1030: 1029: 1003: 997: 996: 995: 993: 990: 989: 963: 957: 956: 955: 937: 931: 930: 929: 927: 924: 923: 853: 849: 848: 844: 815: 811: 810: 806: 780: 776: 757: 753: 727: 723: 722: 718: 697: 693: 680: 674: 673: 668: 667: 662: 661: 655: 654: 649: 641: 633: 631: 628: 627: 600: 594: 593: 588: 586: 583: 582: 562: 556: 555: 550: 548: 545: 544: 456: 452: 444: 438: 437: 432: 430: 427: 426: 385: 384: 382: 379: 378: 343: 335: 332: 331: 260: 197:)), the set of 163: 119: 108: 102: 99: 56: 54: 44: 32: 21: 12: 11: 5: 2409: 2399: 2398: 2393: 2376: 2375: 2370: 2367: 2366: 2364: 2363: 2358: 2353: 2348: 2343: 2338: 2332: 2330: 2326: 2325: 2323: 2322: 2317: 2312: 2307: 2302: 2296: 2294: 2290: 2289: 2287: 2286: 2281: 2276: 2271: 2266: 2261: 2256: 2251: 2246: 2240: 2238: 2234: 2233: 2231: 2230: 2229: 2228: 2218: 2213: 2212: 2211: 2201: 2196: 2191: 2186: 2181: 2176: 2171: 2166: 2165: 2164: 2162:co-NP-complete 2159: 2154: 2149: 2139: 2133: 2131: 2127: 2126: 2124: 2123: 2118: 2113: 2108: 2103: 2098: 2093: 2092: 2091: 2081: 2076: 2071: 2066: 2065: 2064: 2054: 2049: 2044: 2039: 2034: 2029: 2024: 2019: 2013: 2011: 2007: 2006: 1999: 1998: 1991: 1984: 1976: 1970: 1969: 1953:Complexity Zoo 1947: 1946:External links 1944: 1943: 1942: 1928: 1912:Arora, Sanjeev 1908: 1902: 1882: 1881: 1872: 1858: 1848: 1847: 1845: 1842: 1841: 1840: 1828: 1825: 1822: 1819: 1816: 1813: 1808: 1805: 1802: 1799: 1796: 1793: 1788: 1785: 1782: 1779: 1776: 1773: 1770: 1765: 1762: 1759: 1756: 1753: 1720: 1719: 1708: 1705: 1700: 1696: 1692: 1689: 1686: 1683: 1680: 1677: 1672: 1669: 1666: 1663: 1660: 1657: 1652: 1649: 1646: 1643: 1640: 1637: 1634: 1629: 1626: 1623: 1620: 1617: 1614: 1609: 1606: 1603: 1600: 1597: 1594: 1591: 1586: 1583: 1580: 1577: 1574: 1571: 1533: 1530: 1511: 1508: 1505: 1502: 1499: 1496: 1493: 1473: 1470: 1467: 1464: 1461: 1458: 1455: 1434: 1430: 1426: 1422: 1419: 1400: 1397: 1393:big O notation 1330: 1329:Machine models 1327: 1326: 1325: 1314: 1307: 1303: 1298: 1294: 1289: 1286: 1283: 1280: 1277: 1274: 1266: 1262: 1259: 1255: 1240: 1229: 1224: 1220: 1216: 1211: 1208: 1205: 1202: 1199: 1196: 1188: 1184: 1181: 1177: 1162: 1135:as assumed. □ 1111:as to compute 1095:. The machine 1057: 1054: 1051: 1046: 1040: 1017: 1014: 1011: 1006: 1000: 977: 974: 971: 966: 960: 954: 951: 948: 945: 940: 934: 908: 907: 896: 893: 890: 887: 884: 877: 874: 871: 868: 865: 862: 859: 856: 852: 847: 843: 836: 833: 830: 827: 824: 821: 818: 814: 809: 805: 798: 795: 792: 789: 786: 783: 779: 775: 772: 769: 766: 763: 760: 756: 752: 745: 742: 739: 736: 733: 730: 726: 721: 715: 712: 709: 706: 703: 700: 696: 692: 689: 683: 677: 671: 665: 658: 652: 648: 644: 640: 636: 603: 597: 591: 565: 559: 553: 497: 494: 491: 488: 485: 482: 479: 474: 471: 468: 465: 462: 459: 455: 451: 447: 441: 435: 403:configurations 388: 346: 342: 339: 308:Turing machine 269: 268: 185:), there is a 162: 159: 121: 120: 35: 33: 26: 9: 6: 4: 3: 2: 2408: 2397: 2394: 2392: 2389: 2388: 2386: 2373: 2368: 2362: 2359: 2357: 2354: 2352: 2349: 2347: 2344: 2342: 2339: 2337: 2334: 2333: 2331: 2327: 2321: 2318: 2316: 2313: 2311: 2308: 2306: 2303: 2301: 2298: 2297: 2295: 2291: 2285: 2282: 2280: 2277: 2275: 2272: 2270: 2267: 2265: 2262: 2260: 2257: 2255: 2252: 2250: 2247: 2245: 2242: 2241: 2239: 2235: 2227: 2224: 2223: 2222: 2219: 2217: 2214: 2210: 2207: 2206: 2205: 2202: 2200: 2197: 2195: 2192: 2190: 2187: 2185: 2182: 2180: 2177: 2175: 2172: 2170: 2167: 2163: 2160: 2158: 2155: 2153: 2150: 2148: 2145: 2144: 2143: 2140: 2138: 2135: 2134: 2132: 2128: 2122: 2119: 2117: 2114: 2112: 2109: 2107: 2104: 2102: 2099: 2097: 2094: 2090: 2087: 2086: 2085: 2082: 2080: 2077: 2075: 2072: 2070: 2067: 2063: 2060: 2059: 2058: 2055: 2053: 2050: 2048: 2045: 2043: 2040: 2038: 2035: 2033: 2030: 2028: 2025: 2023: 2020: 2018: 2015: 2014: 2012: 2008: 2004: 1997: 1992: 1990: 1985: 1983: 1978: 1977: 1974: 1967: 1965: 1961: 1955: 1954: 1950: 1949: 1939: 1935: 1931: 1925: 1921: 1917: 1913: 1909: 1905: 1899: 1895: 1891: 1886: 1885: 1876: 1869: 1862: 1853: 1849: 1820: 1814: 1786: 1777: 1771: 1742: 1741: 1740: 1738: 1734: 1730: 1726: 1725: 1706: 1698: 1687: 1681: 1650: 1641: 1635: 1607: 1598: 1592: 1560: 1559: 1558: 1556: 1552: 1548: 1544: 1543: 1538: 1528: 1523: 1503: 1497: 1491: 1465: 1459: 1453: 1420: 1417: 1410: 1406: 1396: 1394: 1390: 1386: 1382: 1378: 1374: 1370: 1366: 1362: 1358: 1353: 1351: 1347: 1343: 1339: 1335: 1305: 1301: 1296: 1260: 1257: 1253: 1244: 1241: 1222: 1218: 1182: 1179: 1175: 1166: 1163: 1160: 1156: 1152: 1149: 1148: 1147: 1145: 1141: 1136: 1124: 1120: 1094: 1090: 1077: 1075: 1071: 1052: 1044: 1012: 1004: 972: 964: 952: 946: 938: 921: 917: 913: 910:According to 891: 885: 882: 872: 869: 866: 863: 860: 854: 850: 845: 841: 831: 825: 822: 819: 816: 812: 807: 803: 793: 787: 784: 781: 777: 770: 764: 761: 758: 754: 750: 740: 734: 731: 728: 724: 710: 704: 701: 698: 694: 687: 646: 638: 626: 625: 624: 622: 618: 580: 542: 538: 534: 530: 526: 522: 517: 515: 511: 492: 489: 486: 480: 477: 469: 463: 460: 457: 453: 449: 424: 420: 416: 412: 408: 404: 376: 372: 367: 365: 361: 340: 337: 329: 325: 321: 317: 313: 309: 305: 301: 297: 293: 289: 285: 281: 277: 273: 264: 259:)) (that is, 258: 254: 250: 246: 242: 238: 235: 234: 233: 231: 226: 224: 220: 216: 212: 208: 204: 200: 196: 192: 188: 184: 180: 176: 172: 168: 158: 156: 153:with a given 152: 148: 144: 140: 136: 132: 128: 117: 114: 106: 95: 92: 88: 85: 81: 78: 74: 71: 67: 64: –  63: 59: 58:Find sources: 52: 48: 42: 41: 36:This article 34: 30: 25: 24: 19: 2345: 1963: 1959: 1951: 1915: 1889: 1875: 1867: 1861: 1852: 1736: 1732: 1722: 1721: 1547:memory space 1540: 1536: 1535: 1402: 1388: 1384: 1380: 1376: 1372: 1368: 1364: 1360: 1356: 1354: 1333: 1332: 1158: 1154: 1137: 1122: 1118: 1103:as on input 1092: 1088: 1078: 1073: 1069: 919: 915: 909: 620: 616: 578: 540: 536: 532: 528: 520: 518: 513: 509: 422: 418: 414: 410: 406: 374: 370: 368: 363: 359: 327: 323: 319: 315: 311: 303: 299: 295: 291: 287: 283: 279: 275: 271: 270: 262: 256: 252: 244: 243:(1)), where 240: 229: 227: 214: 210: 206: 205:using space 194: 190: 182: 178: 166: 165:The measure 164: 143:memory space 134: 130: 124: 109: 103:October 2009 100: 90: 83: 76: 69: 57: 45:Please help 40:verification 37: 2209:#P-complete 2147:NP-complete 2062:NL-complete 1739:), we have 1115:. However, 543:is at most 223:alternation 2385:Categories 2264:ELEMENTARY 2089:P-complete 1938:1193.68112 1844:References 1363:such that 1157:(log  922:such that 413:. Because 73:newspapers 2259:2-EXPTIME 1787:⊆ 1731:function 1651:⊆ 1608:⊆ 1429:→ 1342:sublinear 1261:∈ 1254:⋃ 1183:∈ 1176:⋃ 1153:= DSPACE( 870:⁡ 864:⁡ 688:≤ 647:≤ 490:⁡ 450:≤ 425:)), then 417:∈ DSPACE( 409:on input 341:∈ 326:∉ DSPACE( 314:in space 310:deciding 298:(log log 278:∈ DSPACE( 239:= DSPACE( 155:algorithm 2254:EXPSPACE 2249:NEXPTIME 2017:DLOGTIME 1359:≥ 1 and 1243:EXPSPACE 1121:| < | 988:, where 508:, where 286:)), for 62:"DSPACE" 2244:EXPTIME 2152:NP-hard 1958:DSPACE( 1091:+ 1 to 302:). Let 137:is the 87:scholar 2351:NSPACE 2346:DSPACE 2221:PSPACE 1936:  1926:  1900:  1553:. By 1542:NSPACE 1537:DSPACE 1334:DSPACE 1165:PSPACE 377:, and 272:Proof: 230:DSPACE 189:SPACE( 167:DSPACE 145:for a 131:DSPACE 89:  82:  75:  68:  60:  18:DSpace 2341:NTIME 2336:DTIME 2157:co-NP 1724:NTIME 1549:on a 918:< 306:be a 135:SPACE 94:JSTOR 80:books 2169:TFNP 1924:ISBN 1898:ISBN 1403:The 1371:) ≥ 1079:Let 1072:and 1028:and 804:< 519:Let 369:Let 294:) = 157:. 66:news 2284:ALL 2184:QMA 2174:FNP 2116:APX 2111:BQP 2106:BPP 2096:ZPP 2027:ACC 1934:Zbl 1377:c f 1119:x' 867:log 861:log 623:is 619:on 539:on 531:on 527:of 487:log 405:of 245:REG 237:REG 225:). 133:or 125:In 49:by 2387:: 2279:RE 2269:PR 2216:IP 2204:#P 2199:PP 2194:⊕P 2189:PH 2179:AM 2142:NP 2137:UP 2121:FP 2101:RP 2079:CC 2074:SC 2069:NC 2057:NL 2052:FL 2047:RL 2042:SL 2032:TC 2022:AC 1966:)) 1956:: 1932:. 1922:. 1918:. 1896:. 1892:. 1522:. 1245:= 1167:= 1161:)) 1146:. 1109:x' 1101:x' 1081:x' 778:.2 516:. 366:. 129:, 2274:R 2084:P 2037:L 1995:e 1988:t 1981:v 1968:. 1964:n 1962:( 1960:f 1940:. 1906:. 1839:. 1827:) 1824:) 1821:n 1818:( 1815:t 1812:( 1807:E 1804:C 1801:A 1798:P 1795:S 1792:D 1784:) 1781:) 1778:n 1775:( 1772:t 1769:( 1764:E 1761:M 1758:I 1755:T 1752:N 1737:n 1735:( 1733:t 1707:. 1704:] 1699:2 1695:) 1691:) 1688:n 1685:( 1682:s 1679:( 1676:[ 1671:E 1668:C 1665:A 1662:P 1659:S 1656:D 1648:] 1645:) 1642:n 1639:( 1636:s 1633:[ 1628:E 1625:C 1622:A 1619:P 1616:S 1613:N 1605:] 1602:) 1599:n 1596:( 1593:s 1590:[ 1585:E 1582:C 1579:A 1576:P 1573:S 1570:D 1510:) 1507:) 1504:n 1501:( 1498:f 1495:( 1492:o 1472:) 1469:) 1466:n 1463:( 1460:f 1457:( 1454:O 1433:N 1425:N 1421:: 1418:f 1389:n 1387:( 1385:f 1381:n 1379:( 1373:1 1369:n 1367:( 1365:f 1361:f 1357:c 1350:L 1313:) 1306:k 1302:n 1297:2 1293:( 1288:E 1285:C 1282:A 1279:P 1276:S 1273:D 1265:N 1258:k 1228:) 1223:k 1219:n 1215:( 1210:E 1207:C 1204:A 1201:P 1198:S 1195:D 1187:N 1180:k 1159:n 1155:O 1151:L 1133:L 1129:x 1125:| 1123:x 1117:| 1113:x 1105:x 1097:M 1093:j 1089:i 1085:x 1074:j 1070:i 1056:) 1053:x 1050:( 1045:j 1039:C 1016:) 1013:x 1010:( 1005:i 999:C 976:) 973:x 970:( 965:j 959:C 953:= 950:) 947:x 944:( 939:i 933:C 920:j 916:i 895:) 892:n 889:( 886:o 883:= 876:) 873:n 858:( 855:o 851:2 846:2 842:= 835:) 832:n 829:( 826:s 823:. 820:c 817:2 813:2 808:2 797:) 794:n 791:( 788:s 785:. 782:c 774:) 771:n 768:( 765:s 762:. 759:c 755:2 751:= 744:) 741:n 738:( 735:s 732:. 729:c 725:2 720:) 714:) 711:n 708:( 705:s 702:. 699:c 695:2 691:( 682:| 676:C 670:| 664:| 657:C 651:| 643:| 639:S 635:| 621:x 617:M 602:| 596:C 590:| 579:M 564:| 558:C 552:| 541:x 537:M 533:x 529:M 521:S 514:M 510:c 496:) 493:n 484:( 481:o 478:= 473:) 470:n 467:( 464:s 461:. 458:c 454:2 446:| 440:C 434:| 423:n 421:( 419:s 415:M 411:x 407:M 387:C 375:k 371:x 364:k 360:M 345:N 338:k 328:O 324:L 320:n 318:( 316:s 312:L 304:M 300:n 296:o 292:n 290:( 288:s 284:n 282:( 280:s 276:L 265:) 263:n 257:n 253:o 241:O 215:n 213:( 211:f 209:( 207:O 195:n 193:( 191:f 183:n 181:( 179:f 116:) 110:( 105:) 101:( 91:· 84:· 77:· 70:· 43:. 20:.

Index

DSpace

verification
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"DSPACE"
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JSTOR
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computational complexity theory
computational resource
memory space
deterministic Turing machine
computational problem
algorithm
complexity classes
decision problems
complexity class
decision problems
deterministic Turing machine
computation time
alternation
REG
regular languages
Turing machine
configurations
crossing sequences

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