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306:{\displaystyle \pi \colon I\times S^{1}\rightarrow S^{1},\quad (x,z)\mapsto z.}
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407:An example wherein π is not surjective on
371:An example wherein π is not bijective on
50:. Unsourced material may be challenged and
391:An example wherein π is bijective on
114:Learn how and when to remove this message
320:is embedded into the annulus so that ฯ
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48:adding citations to reliable sources
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230:. Let ฯ denote the projection map
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223:{\displaystyle I\times S^{1}}
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104:December 2009
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59:Find sources:
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42:Please help
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128:mathematics
417:References
353:surjective
322:restricted
190:An example
165:peripheral
161:โ-parallel
74:newspapers
330:bijection
295:↦
263:→
250:×
244::
241:π
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180:component
31:does not
425:Category
338:converse
177:boundary
145:embedded
139:manifold
355:, then
351:is not
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175:onto a
169:isotopy
147:in an (
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375:, but
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95:JSTOR
81:books
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92:ยท
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