Mathematics
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Justin Young
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All Questions Answers
Score Newest
answer
21
CW complex structure of the projective space $\mathbb{RP}^n$
Sep 12, 2012
answer
17
Is closure of convex subset of $X$ is again a convex subset of $X$?
Sep 26, 2012
answer
15
What tells rational cohomology about integral cohomology?
Oct 27, 2011
answer
13
Why do we ask that condition in Kan complex?
Mar 25, 2014
answer
12
Proving that a subgroup of a finitely generated abelian group is finitely generated
Apr 26, 2012
answer
10
Explicit isomorphism $\tilde{H_n}(X)\simeq \tilde{H}_{n+1}(SX)$.
May 2, 2012
answer
7
Chern Classes and Stiefel-Whitney Classes
May 1, 2012
answer
7
show $2^{2^n} + 1 \equiv 2 \pmod{2^{2^m} + 1} $ with $0<m<n$
May 22, 2012
answer
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, 2016
answer
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, 2017
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Defining terms in philosophy?

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