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1d
revised How does extension of restriction of $M$ relate to $M$?
edited title
1d
answered Irreducible components of fiber bundle
Apr
23
revised How does extension of restriction of $M$ relate to $M$?
added 7 characters in body
Apr
23
asked How does extension of restriction of $M$ relate to $M$?
Mar
9
accepted Does taking torsion commute with extension of scalars by a flat module?
Mar
8
asked Does taking torsion commute with extension of scalars by a flat module?
Mar
7
awarded  Nice Answer
Mar
7
revised Pullback of sheaf of a divisor by a desingularization mod torsion.
added 771 characters in body
Mar
6
revised Pullback of sheaf of a divisor by a desingularization mod torsion.
[Edit removed during grace period]
Mar
6
asked Pullback of sheaf of a divisor by a desingularization mod torsion.
Mar
5
comment Is the pullback of an ample divisor always nef?
@TakumiMurayama Thank you.
Mar
5
comment Is the pullback of an ample divisor always nef?
@TakumiMurayama thank you for that link. Does $f$ begin proper help to pullback divisors? Is this used to show that the pullback of semi-ample is semi-ample?
Mar
5
comment Is the pullback of an ample divisor always nef?
@Mohan maybe it isn't defined and I am just confused. I need to learn intersection theory.
Mar
5
asked Is the pullback of an ample divisor always nef?
Jan
31
comment Example of two sequences $(a_n)$ and $(b_n)$ such that both of them are bounded, neither of them is convergent, but $(a_n + b_n)$ is convergent?
Think $-1$'s and $+1$'s
Jan
11
comment Why is $[\widetilde{v},\widetilde{w}]_p(f)=0$ when $f$ has a critical point at $p$?
@Marc $[\tilde{v},\tilde{w}]$ is a vector field, and $[\tilde{v},\tilde{w}]_p(f)$ means to differentiate $f$ at $p$ in the direction of $[\tilde{v},\tilde{w}]_p$. Since $p$ is a critical point of $f$, the total derivative of $f$ is zero at $p$, and hence every directional derivative is zero as well.
Dec
5
revised Vanishing of Tor sheaf on a union of subschemes with vanishing Tor.
added 12 characters in body
Dec
4
asked Vanishing of Tor sheaf on a union of subschemes with vanishing Tor.
Nov
28
awarded  Nice Answer
Nov
14
awarded  Popular Question