Skip to main content
Heitor's user avatar
Heitor's user avatar
Heitor's user avatar
Heitor
  • Member for 11 years, 3 months
  • Last seen more than 3 years ago
Loading…
accepted
comment
Weyl group of a K3 surface
ok sorry, let me edit
revised
Weyl group of a K3 surface
added 5 characters in body
Loading…
asked
Loading…
Loading…
comment
Smoothness of the quotient surface by an involution with nice fixed locus
Thanks @WillSawin. You also made me notice the terrible mistake I made by mixing notation for $X$ and $Y$ (now $Z$ and $W$). Let me edit and fix that.
comment
Smoothness of the quotient surface by an involution with nice fixed locus
Dear abx, if I understand correctly what you are saying is that in general $S(\theta)=\pi^\ast S_Y$, where $S_Y$ is the Picard group of $Y$ and $S(\theta)$ are the $\theta$-fixed elements of $S_X$. Could you please explain me why is this true?
awarded
revised
Loading…
Loading…
Loading…
accepted
comment
Nefness on a K3 surface
Wait a moment. But if $D$ is effective and $D^2\geq 0$ then $D$ is nef on any surface, isn't it?
asked
Loading…
accepted
asked
Loading…
accepted
asked
Loading…