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Jan
17
revised When do regular values form an open set?
added 319 characters in body
Jan
17
revised When do regular values form an open set?
deleted 157 characters in body
Jan
11
revised Dual notion of free module
added 275 characters in body
Nov
30
revised $\mathrm{Spec}(R)\!=\!\mathrm{Max}(R)\!\cup\!\{0\}$ $\Rightarrow$ $R$ is a PID
added 117 characters in body
Nov
26
revised Are fixed fields of finite subgroups generated by symmetric polynomials on Galois conjugates?
edited tags
Nov
2
revised Proving the class number of $\mathbb{Q}(\sqrt{-5})$ is 2 using Ireland-Rosen's bound
added 128 characters in body
Oct
5
revised Splicing together Short Exact Sequences
added 347 characters in body
Oct
5
revised Splicing together Short Exact Sequences
added 564 characters in body
Sep
25
revised The endomorphism of field
edited tags
Sep
4
revised Abstract nonsense proof of the cocompleteness of the category of groups
deleted 338 characters in body
Sep
4
revised Abstract nonsense proof of the cocompleteness of the category of groups
added 285 characters in body
Jul
21
revised A free group on the non-empty set $X$ is solvable iff $|X| =1$
edited tags
Jul
20
revised Graph $y=1/\sin x$
added 137 characters in body
Jul
20
revised Graph $y=1/\sin x$
added 645 characters in body; edited body
Jul
20
revised Graph $y=1/\sin x$
added 442 characters in body; added 95 characters in body
Jul
19
revised Why is associativity required for groups?
edited tags
Jul
4
revised Abelian categories and axiom (AB5)
added 68 characters in body
Jun
12
revised Some questions about the Tor functor as a two-variable functor related to the arbitrary character of the choice of projective resolutions
deleted 1305 characters in body
May
11
revised Codomains, products and limits
added 9 characters in body
May
8
revised Explicit isomorphism $\tilde{H_n}(X)\simeq \tilde{H}_{n+1}(SX)$.
I've removed the "homework" tag, since the deadline is over