Paths and Loops in Fundamental Group Proofs: Clarification Needed?

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SUMMARY

The discussion centers on the clarification of paths and loops in the context of fundamental group proofs. The original poster (OP) questions whether the paths α and α' should be defined from x0 to x1 instead of being considered loops. A contributor suggests that allowing x1 to be any point strengthens the hypothesis, as setting x1 = x0 permits the use of loops. This adjustment is confirmed to be sufficient for proving the case in question.

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You could allow x1 to be any point in your hypothesis. So, you can choose x1 = x0, and then you can have loops. That's a stronger assumption.

Actually, he did an edit to show that it's good enough to prove it for that case.
 

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