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Tagged with divisors projective-varieties
4 questions with no upvoted or accepted answers
6
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Global sections of canonical line bundle on projective curve with everywhere vanishing derivative
Let $k$ be an algebraically closed field of positive characteristic $p$, $C$ be a curve (projective, non-singular, connected) of genus $g\geq 2$ over $k$ and $\omega \in H^0(C, \Omega_C)$ be a regular ...
3
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121
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Detecting non-principal Weil divisors on normal varieties using curves
Let $X$ be a normal projective variety over an algebraically closed field $k$. Given any morphism $f:Y\to X$, there is a pullback homomorphism $f^*:\text{Cl}(X)\to\text{Cl}(Y)$, where $\text{Cl}(X)$ ...
3
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Existence of regular hypersurface sections
Let $X$ be a irreducible regular projective variety over $Spec(O_K)$ for some number field $K$. Is it known that there exists at least one hypersurface over $Spec(O_K)$ such that cuts $X$ in a regular ...
0
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285
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Pencil of divisors in algebraic geometry
Let $X \subset \mathbb{P}^n$ be projective variety over alg closed field of char $0$ and
$C = V(F), D= V(G) \subset X$ two distinct divisors (e.g. two quadrics,
curves or lines lying in a surface,...) ...