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accepted Is the cohomology ring (coefficients in a field) functor right adjoint to something? Or, why does it commute with products?
Feb
7
comment On the meaning of the word “generic” in Lie Algebra (or otherwise)
A "generic point" is one that lies in every nonempty open subset, at least in algebraic geometry. (And on an irreducible scheme.) I think it is pretty rare for an interesting topological space to have the property that the intersection of all non-empty closed sets is nonempty...
Feb
4
answered Soft question about connection between flow and group actions
Jan
31
answered Cech cohomology commuting with colimits? (Non noetherian confusion.)
Jan
31
revised Cech cohomology commuting with colimits? (Non noetherian confusion.)
added 440 characters in body
Jan
31
revised Cech cohomology commuting with colimits? (Non noetherian confusion.)
added 1487 characters in body
Jan
31
revised Cech cohomology commuting with colimits? (Non noetherian confusion.)
added 1487 characters in body
Jan
31
answered A is compact if and only if A is finite
Jan
31
revised Cech cohomology commuting with colimits? (Non noetherian confusion.)
added 697 characters in body
Jan
31
comment Manifolds or Complex Analysis for Algebraic Geometry?
This is something you should discuss with a professor at your institution.
Jan
31
asked Cech cohomology commuting with colimits? (Non noetherian confusion.)
Jan
31
comment open equivalence relation and closed graph of it
What is an open equivalence relation?
Jan
28
answered Associvity and Distributive property of Matrix Multiplication
Jan
28
asked Method of counting constants / Krull's principal ideal theorem
Jan
28
comment open set whose inverse image under a dominant morphism is contained in an open set
I think if the varieties are the same dimension one can say something positive - at least, it is so for curves because the cofinite topology is easy to work with. You may like to add some finiteness hypothesis to avoid the set theoretic trick in Mohans answer.
Jan
28
comment Exterior power “commutes” with direct sum
To what extent does the adjointness of $\wedge$ carry over to the symmetric algebra and tensor algebra constructions? The tensor algebra shouldn't be left adjoint (because it doesn't preserve coproducts, I think). Maybe I am confused.
Jan
28
revised Any convex set is connected
added 2 characters in body
Jan
28
comment Any convex set is connected
@Maffred Of course, I do expect some form of compensation in the form of, say, an upvote on this answer.
Jan
28
revised Any convex set is connected
added 119 characters in body
Jan
28
comment Any convex set is connected
@Maffred You actually stole it! I am truly flattered. :)