Gorenstein points in P3\mathbb{P}^3 via Hadamard product of projective varieties

preprint2022arXivOpen access

Abstract

We show how to construct a stick figure of lines in P3\mathbb{P}^3 using the Hadamard product of projective varieties. Then, applying the results of Migliore and Nagel, we use such stick figure to build a Gorenstein set of points with given h−h-vector h{\mathbf h}. Since the Hadamard product is a coordinate-wise product, we show, at the end, how the coordinates of the points, in the Gorenstein set, can be directly determined.

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