Gorenstein points in P3 via Hadamard products of projective varieties

Bocci, C. ^[1] ; Capresi, C. ^[1] ; Carrucoli, D. ^[1]
1. [1] Dipartimento di Ingegneria dell’Informazione e Scienze Matematiche, Università di Siena, Via Roma, 56, Siena, Italy
Localización: Collectanea mathematica, ISSN 0010-0757, Vol. 74, Fasc. 3, 2023, págs. 505-527
Idioma: inglés
DOI: 10.1007/s13348-022-00362-9
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Resumen
- We show how to construct a stick figure of lines in P3 using the Hadamard product of projective varieties. Then, applying the results of Migliore and Nagel, we use such a stick figure to build a Gorenstein set of points with given h−vector hh. 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.