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 Yearling
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Nov
18
awarded  Yearling
Oct
8
answered Can one drop the locally free assumption in projection formula on a projective bundle?
Sep
28
answered Can relative flatness of a sheaf be tested using (faithfully) flat morphisms?
Sep
8
comment Reduction to some physical interpretation of this formula
@GerryMyerson Up to division by 2 and replacing some latin letters with greek analogues.
Aug
5
comment Why would we a priori expect $V(I)$ to satisfy axioms to define the closed sets for a topology on $\text{Proj}(S)$?
Can you answer your own question for $Spec(A)$?
Aug
4
comment Three and a half basic questions on the Weil restriction of scalars
@grghxy thank you for pointing that out
Aug
4
revised Three and a half basic questions on the Weil restriction of scalars
added 91 characters in body
Aug
4
answered Three and a half basic questions on the Weil restriction of scalars
Jul
30
comment Supplementary notes to Mumford's The Red Book of Varieties and Schemes
Vakil is great, but definitely need presence of motivation.
May
13
comment Canonical (tautological) section of a family of sheaves
I actually quite enjoy your perspective.
May
12
answered Canonical (tautological) section of a family of sheaves
Jan
22
comment What is a Beilinson spectral sequence?
The general case is nicely stated in Christian Boening's paper mathematik.uni-bielefeld.de/documenta/vol-11/11.pdf
Jan
17
awarded  Enlightened
Jan
17
awarded  Nice Answer
Jan
16
comment Why do we need localization by Leftschetz motive?
I should point out that Borisov's counterexample does not prove Galkin-Shinder wrong. Actually, they need something less strong.
Jan
13
comment Moving a divisor on a (reducible, non-reduced) curve
This is really neat!
Dec
25
comment Triangulated category of singularities of quotient
The right term is "triangulated category of singularities"
Dec
24
comment Blow-ups of $\mathbb{P}^{n-3}$ and $(\mathbb{P}^1)^{n-3}$
I like the trick with moving "extra" points, but it would still be nice to have a purely geometric construction.
Dec
18
answered On understanding Orlov's LG B model
Dec
8
comment Properties of finite quotients of quasi-projective varieties
@Sasha Isn't $X/G$ always the categorical quotient in the quasi-projective case?