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May
28
answered On what sets can $\mathfrak{S}_n$ act transitively?
May
26
answered How to construct a quasi-category from a category with weak equivalences?
May
25
answered Why is the 'mapping space' between two objects in a quasi-category a Kan complex?
May
25
answered De Rham cohomology for $\mathbb{R^2}$
May
23
answered Does there always exist finitely presented submodules?
May
21
answered The dense topology
May
17
answered When will a pointed category / arrow category be cartesian closed / a model category if the base category is cartesian closed / a model category?
May
13
answered Affine open sets of a scheme after a base change
May
8
answered Sheaf condition for subcoverings
May
8
answered Category of accessible functors and its closedness
May
8
answered Is there a nice topology on Aut(C)?
May
6
answered Sheaf condition for finite coverings
May
6
answered The existence of a projective resolution of M from finite rank free modules
Apr
18
answered Basic localizers contain adjoint functors
Apr
18
answered Canonically isomorphic but not equal
Apr
11
answered If the functor on presheaf categories given by precomposition by F is ff, is F full? faithful?
Apr
8
answered Inequivalent Model Categories
Apr
7
answered If an identity in the language of rings holds for all fields, does it necessarily hold for all commutative rings?
Apr
7
answered Why is this function not injective?
Apr
7
answered CABool not cartesian closed