Homotopy paths

  • Thread starter valtz
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  • #1
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i stuck when i want to prove theorem 51.3 in munkres 2en editions about homotopy paths

Let f be a path in X , and let a0 , .... , an be numbers such that 0= a0 < a1 < ... < an. Let fi : I → X be the path that equals the positive linear map of I onto [ai-1, ai] followed by f then

[f] = [f1] * ..... * [fn]


any idea to start prove this theorems?
 

Answers and Replies

  • #2
mathwonk
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draw a picture.
 

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