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- W2951338448 abstract "We consider a set $X$ of distinct points in the $n$-dimensional projective space over an algebraically closed field $k$. Let $A$ denote the coordinate ring of $X$, and let $a_i(X)=dim_k [{rm Tor}_i^R(A,k)]_{i+1}$. Green's Strong Castelnuovo Lemma (SCL) shows that if the points are in general position, then $a_{n-1}(X)neq 0$ if and only if the points are on a rational normal curve. Cavaliere, Rossi and Valla conjectured that if the points are not necessarily in general position the possible extension of the SCL should be the following: $a_{n-1}(X)neq 0$ if and only if either the points are on a rational normal curve or in the union of two linear subspaces whose dimensions add up to $n$. In this work we prove the conjecture." @default.
- W2951338448 created "2019-06-27" @default.
- W2951338448 creator A5041388512 @default.
- W2951338448 date "2008-11-22" @default.
- W2951338448 modified "2023-09-27" @default.
- W2951338448 title "A generalization of the Strong Castelnuovo Lemma" @default.
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