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location Moscow
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visits member for 3 years, 10 months
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Aug
27
answered linear section of codimension $k+1$ of a variety of dimension $k$
Aug
25
comment if V(f) is irreducible, then how to show that the polynomial f itself is irreducible?
This is not a research level question.
Jun
4
answered Why does restriction of Weil divisors “clearly” preserve principal-ness?
May
15
comment Reference needed: Homology of the blow-up
Do you put any restrictions on $V$?
May
14
answered “Exactness” of groupify functor
Mar
15
comment Dimension of a commuting nilpotent variety
I'd say that this is a no so trivial question. Namely, if you omit the "commute with $A$" condition, you get the variety of commuting nilpotent matrices. Its dimension is $n^2-1$, which is not obvious (see "The Variety of Pairs of Commuting Nilpotent Matrices is Irreducible" by Volodia Baranovsky).
Feb
21
answered Easy to state applications of dimension theory in algebraic geometry
Feb
21
answered Failure of Noether normalization
Feb
12
awarded  Self-Learner
Feb
11
awarded  Revival
Feb
11
awarded  Scholar
Feb
11
accepted Iterated Pieri's rule, Schur functors and intersection of subrepresentations
Feb
11
answered Iterated Pieri's rule, Schur functors and intersection of subrepresentations
Feb
11
asked Equivariant derived category and invariant divisor
Feb
8
comment For what varieties do we have results on the category of singularities?
You'd better call it "(triangulated) category of singularities". Not to confuse with smoothness.
Feb
7
answered Cohomology for Grassmannian
Jan
26
comment Does quasi-projective imply quasi-compact (in the Zariski topology)?
@QiaochuYuan sure, that's actually a criterion. Thank you for the term though, have never heard of this one.
Jan
26
comment Does quasi-projective imply quasi-compact (in the Zariski topology)?
@HugoChapdelaine no problem, happens to all of us
Jan
26
answered Does quasi-projective imply quasi-compact (in the Zariski topology)?
Jan
26
comment Grothendieck group of intersection of quadrics
I personally don't see any problem here. As far as I'm concerned, an intersection of two even-dimensional quadrics has odd dimension.