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Dec
27
comment Numerical invariants of symmetric products of curves
Thank you for the very nice answer!
Dec
27
accepted Numerical invariants of symmetric products of curves
Dec
26
comment Numerical invariants of symmetric products of curves
I am interested in $n<g$.
Dec
26
revised Numerical invariants of symmetric products of curves
edited body
Dec
26
comment Numerical invariants of symmetric products of curves
@JasonStarr: thank you. In fact $C$ general is what I am interested in, and $g$ large with respect to $n$ is also fine.
Dec
26
comment Numerical invariants of symmetric products of curves
yes, I mean nef&big canonical bundle
Dec
26
asked Numerical invariants of symmetric products of curves
Nov
6
awarded  Yearling
May
12
awarded  Nice Answer
Dec
7
awarded  Custodian
Dec
7
reviewed Approve Definition of an E-infinity algebra
Nov
8
answered Kummer Coverings
Nov
6
awarded  Yearling
Sep
24
awarded  Autobiographer
Jul
8
comment smooth quotient out of a singular variety?
I forgot irreducible, sorry!
Jul
8
comment smooth quotient out of a singular variety?
A variation of this answer in order to satisfy Libli's request that the example be quasi-projective: take $X$ the union of two planes of $\mathbb C^4$ intersecting at the origin and let $\mathbb Z_2$ act by identifying the two planes via any linear isomorphism. $X$ is affine and behaves as Dan's example.
Jul
2
awarded  Curious
Jun
28
awarded  Popular Question
Mar
4
comment Does $h^1(D)=0$ imply numerical connectedness on K3 surfaces?
Ciao Pigna! welcome to MO!
Mar
4
comment Does $h^1(D)=0$ imply numerical connectedness on K3 surfaces?
No. For instance if $A$ is a a rational curve with $A^2<0$, then $h^0(\mathcal O_A(-A))>0$.