Abstract
In this note we consider multiples $aD$, where $D$ is a divisor of the blow-up of $\mathbb{P}^n$ along points in general position which appears in the Alexander and Hirschowitz list of Veronese embeddings having defective secant varieties. In particular we show that there is such a $D$ with $h^1(X,D) > 0$ and $h^1(X,2D) = 0$.
Citation
Antonio Laface. Luca Ugaglia. "On multiples of divisors associated to Veronese embeddings with defective secant variety." Bull. Belg. Math. Soc. Simon Stevin 16 (5) 933 - 942, December 2009. https://doi.org/10.36045/bbms/1260369407
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