(i) True or False: If a path-connected space X is contractible (i.e. the identity map id : X X, id(x) = x, is homotopic to a constant map c: X X, c(x) = xo), then X is simply connected (i.e. 1(X, xo) is trivial). The converse is not necessarily true.

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(i) True or False: If a path-connected space X is contractible (i.e. the identity map
id : X X, id(x) = x, is homotopic to
X is simply connected (i.e. T(X, xo) is trivial). The converse is not necessarily true.
constant mapc: X→ X, c(x) ro), then
(ii) Assume X is path connected and 71(X, ro) is abelian (i.e. [S] [g] = [g] * [f] for all
[f1. Jg] E 71(X, xo)). Show that for any yo E Y and any two paths a1, a2 connecting
ro to yo the homomorphisms 1, 2 : T1(X, xo) → T1(X, yo) with P1([S]) = [a,'fa1]
and d2(f) [a, fa2] are the same homomorphism.
(iii) Let p: X → X be a covering map and assume both X and X
a: (0, 1] → X is a loop based at ro E X and assume yo, 2o E p'{xo}, yo # Zo. If the
unique lift a : [0, 1]→ X with ã(0) = yo is such that a(1) = žo, then X is not simply
connected.
are path connected. Say
->
82
Transcribed Image Text:onne Messaging | Wyzant Tutoring O ME341b5d81269c3376a50a604d × + 50a604dea9fd0f0?Expires-D1619696031&Signature=s2JaujQ22NGzqiUV4jQLyvgg~GcWi6DvajZEsmp-TGBW.. 4/ 7 100% + (i) True or False: If a path-connected space X is contractible (i.e. the identity map id : X X, id(x) = x, is homotopic to X is simply connected (i.e. T(X, xo) is trivial). The converse is not necessarily true. constant mapc: X→ X, c(x) ro), then (ii) Assume X is path connected and 71(X, ro) is abelian (i.e. [S] [g] = [g] * [f] for all [f1. Jg] E 71(X, xo)). Show that for any yo E Y and any two paths a1, a2 connecting ro to yo the homomorphisms 1, 2 : T1(X, xo) → T1(X, yo) with P1([S]) = [a,'fa1] and d2(f) [a, fa2] are the same homomorphism. (iii) Let p: X → X be a covering map and assume both X and X a: (0, 1] → X is a loop based at ro E X and assume yo, 2o E p'{xo}, yo # Zo. If the unique lift a : [0, 1]→ X with ã(0) = yo is such that a(1) = žo, then X is not simply connected. are path connected. Say -> 82
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