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visits member for 4 years, 5 months
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May
19
revised notation used in algebraic topology
edited tags
May
18
revised Proof that the subalgebra generated by any two elements of $\mathbb{O}$ is isomorphic to $\mathbb{R}$, $\mathbb{C}$, or $\mathbb{H}$
edited tags
May
18
revised Unit or non-zero octonions form an $A_\infty$-space?
added 180 characters in body
May
18
revised Quaternionic veronese Embedding
link fixed
May
18
revised differential in AHSS for spin cobordism
more tags
May
14
revised Is there any group $H\times K$ where $H\times 1$ and $1\times K$ are the only subgroups of order $n$?
added the exact reference
May
12
revised Verifying Touchard's Identity
added 12 characters in body; edited tags
May
12
revised Examine the convergence of $\left({\cos n\over n}\right)$
edited title
May
11
revised Show that $x$ is an algebraic number? Where $x$ is…
deleted 4 characters in body
May
11
revised Prove: $\lim\limits_{(x,y)\to (0,0)}\frac{xy}{(x^2+y^2)^\frac12}=0$
edited title
May
8
revised How to compute the sum $\sum_{r=0}^n \frac{(-1)^r}{{n \choose r}}$
tex &c
May
7
revised When characteristic classes determine a bundle?
two examples added
May
6
revised $f(x,y)={{xy^3}\over {x+y^2}},(x,y) \ne (0,0)$ and $f(x,y)=0, (x,y)=(0,0)$
no displaymath it titles, please
May
4
revised $\operatorname{Hom}_\Lambda (B, \operatorname{Hom}_{\Bbb Z}(\Lambda, X)) = \operatorname{Hom}_\Bbb Z (B, X)$
edited tags
May
1
revised Converse of a fixed-point theorem
ref
May
1
revised Converse of a fixed-point theorem
added 521 characters in body
Apr
24
revised Is there a “natural” / “categorical” definition of the “parity” of a permutation?
a typo fixed
Apr
18
revised Topological invariance of chern classes
edited tags
Feb
7
revised Show that ${n\choose r}2^r 3^{n-r}=\sum_{k=r}^{n} {n \choose k} {k \choose r}2^k$
edited tags
Feb
2
revised How can I mathematically read this map $f:A\longrightarrow B$?
edited tags