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References to 'homotopy of maps'
1. (path) connectness as a homotopy invariant by joking
2. antipodal by mathcam
3. antipodal map on $S^n$ is homotopic to the identity if and only if $n$ is odd by mps
4. closed curve theorem by djao
5. closed differential forms on a simply connected domain by paolini
6. contractible by RevBobo
7. deformation retract by mathcam
8. degree (map of spheres) by drini
9. every map into sphere which is not onto is nullhomotopic by joking
10. fundamental concepts in differential geometry by rspuzio
11. H-space by yark
12. hairy ball theorem by rspuzio
13. homotopy equivalence by matte
14. homotopy extension property by RevBobo
15. homotopy invariance by pbruin
16. homotopy with a contractible domain by joking
17. identity map by bwebste
18. monodromy by mathcam
19. nullhomotopic map by drini
20. proof of Cauchy residue theorem by paolini
21. proof of closed differential forms on a simple connected domain by paolini
22. quantum Riemannian geometry by bci1
23. quotient category by CWoo
24. simplicial approximation by Mathprof
25. simplicial approximation theorem by Mathprof
26. t-cat by juanman
27. the sphere is indecomposable as a topological space by joking