John0417
Reputation
Next privilege 250 Rep.
 Jul2 awarded Curious May23 awarded Editor May23 revised Use Hurewicz Theorem to calculate $\pi_3(\mathbb{R}P^4 \vee S^3)$ added 2 characters in body May23 asked Use Hurewicz Theorem to calculate $\pi_3(\mathbb{R}P^4 \vee S^3)$ Dec13 accepted Real projection spaces Dec13 comment Fundamental group of the connected sum of manifolds What happened when M, N are knot complements? Dec13 asked Real projection spaces Dec13 comment homotopy groups of mapping space Would do please be a little more specific? That will help a lot! Thanks! Dec12 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 Dec12 comment homotopy groups of mapping space I didn't see how that could help. I'm think of using $\sigma':(S^k\times X\to Y)$ Dec11 asked homotopy groups of mapping space Dec11 awarded Commentator Dec5 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 Dec5 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 $[a,[b,c^{-1}]]=1$ Dec5 asked Fundamental group of the complement of Borromean rings Oct31 comment Distance and compact sets note if one of the set is compact, then notice function d is a continuous function Oct31 comment Distance and compact sets for c, think about the xy=1 and the axis; Mar22 awarded Tumbleweed Mar18 asked An addition property of Weierstrass $\wp$ Mar17 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 $$\sum(a_n z^n)=\sum (na_n z^n)$$