homotopic paths

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(A) Homotopic and nonhomotopic paths; (B) closed paths.

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homotopic paths

mathematics

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definition

In homotopy
…with common endpoints are called homotopic if one can be continuously deformed into the other leaving the end points fixed and remaining within its defined region. In part A of the figure, the shaded region has a hole in it; f and g are homotopic paths, but g′ is not…
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