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seen May 28 at 16:18

Jul
2
awarded  Curious
May
23
awarded  Editor
May
23
revised Use Hurewicz Theorem to calculate $\pi_3(\mathbb{R}P^4 \vee S^3)$
added 2 characters in body
May
23
asked Use Hurewicz Theorem to calculate $\pi_3(\mathbb{R}P^4 \vee S^3)$
Dec
13
accepted Real projection spaces
Dec
13
comment Fundamental group of the connected sum of manifolds
What happened when M, N are knot complements?
Dec
13
asked Real projection spaces
Dec
13
comment homotopy groups of mapping space
Would do please be a little more specific? That will help a lot! Thanks!
Dec
12
comment homotopy groups of mapping space
Obviously I can't assume Y is an Eilenberg-Maclane space;and the result is to show the case when k$\le$n-m
Dec
12
comment homotopy groups of mapping space
I didn't see how that could help. I'm think of using $\sigma':(S^k\times X\to Y)$
Dec
11
asked homotopy groups of mapping space
Dec
11
awarded  Commentator
Dec
5
comment Fundamental group of the complement of Borromean rings
I think I got it, using Wirtinger Presentation and get 6 relations, then reduce them to 3 as the form of commutators
Dec
5
comment Fundamental group of the complement of Borromean rings
it says that circle C links with circle A,B in a way as $aba^{-1}b^{-1}$, but I want to show that $[a,[b,c^{-1}]]=1$
Dec
5
asked Fundamental group of the complement of Borromean rings
Oct
31
comment Distance and compact sets
note if one of the set is compact, then notice function d is a continuous function
Oct
31
comment Distance and compact sets
for c, think about the xy=1 and the axis;
Mar
22
awarded  Tumbleweed
Mar
18
asked An addition property of Weierstrass $\wp$
Mar
17
comment Infinite product formula for a complex function
hmm, here I used En to the power n,to satisfies the multiplicity condition. it still converges right? Followed by the radius of convergence of $$\sum(a_n z^n)=\sum (na_n z^n)$$