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Oct
5
answered Splicing together Short Exact Sequences
Sep
4
answered Abstract nonsense proof of the cocompleteness of the category of groups
Aug
9
asked Abstract nonsense proof of the cocompleteness of the category of groups
Jul
19
answered Graph $y=1/\sin x$
Jul
19
answered Why is associativity required for groups?
May
11
answered Codomains, products and limits
Apr
30
asked Explicit isomorphism $\tilde{H_n}(X)\simeq \tilde{H}_{n+1}(SX)$.
Apr
21
asked Examples of comma categories
Apr
15
answered Ideal as a projective module
Mar
17
asked What is the probability that a solitaire game be winnable?
Feb
19
asked $\mathbb{Z}$ is a defective ring
Feb
10
asked Some questions about the Tor functor as a two-variable functor related to the arbitrary character of the choice of projective resolutions
Feb
2
answered linear maps $\mathbb{R} \to \mathbb{R}$ are bijective or zero
Jan
31
answered Composition and one factor are monomorphisms, is the other factor mono?
Jan
31
asked Can we compare limits over different diagrams?
Jan
21
asked Right adjoints preserve limits
Jan
21
answered How many connected components does $\mathrm{GL}_n(\mathbb R)$ have?
Jan
17
asked Hopkins-Levitzki: an uncanny asymmetry?
Jan
13
asked “The Yoneda embedding reflects exactness” is a direct consequence of Yoneda?
Jan
12
asked A result of flat modules that *needs* to deal with the *construction* of the tensor product?