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Justin Young

Apparently, this user prefers to keep an air of mystery about them.

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  • Member for 8 years, 3 months
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Top posts (59) All Questions Answers | Votes Newest

13 What tells rational cohomology about integral cohomology? Oct 27 '11
13 Why do we ask that condition in Kan complex? Mar 25 '14
12 CW complex structure of the projective space $\mathbb{RP}^n$ Sep 12 '12
10 Explicit isomorphism $\tilde{H_n}(X)\simeq \tilde{H}_{n+1}(SX)$. May 2 '12
9 Proving that a subgroup of a finitely generated abelian group is finitely generated Apr 26 '12
8 Is closure of convex subset of $X$ is again a convex subset of $X$? Sep 26 '12
7 Chern Classes and Stiefel-Whitney Classes May 1 '12
7 show $2^{2^n} + 1 \equiv 2 \pmod{2^{2^m} + 1} $ with $0<m<n$ May 22 '12
6 Show that for any positive integer $n$ there is $x \in [0,1-\frac{1}{n}]$ for which $f(x) = f(x+\frac{1}{n})$ Feb 23 '16
6 Prove that $\left\{(x,y)\in \mathbb R^2: \ x^2-xy+y^2-1=0\right\}$ is a closed and bounded set. Apr 18 '17
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