English

Interpolation of toric varieties

Algebraic Geometry 2024-09-16 v2

Abstract

Let XPdX\subset \mathbb P^d be a mm-dimensional variety in dd-dimensional projective space. Let kk be a positive integer such that (m+kk)d\binom{m+k}k \le d. Consider the following interpolation problem: does there exist a variety YPdY\subset \mathbb P^d of dimension (m+kk)1\le \binom{m+k}k -1, with XYX\subset Y, such that the tangent space to YY at a point pXp\in X is equal to the kkth osculating space to XX at pp, for almost all points pXp\in X? In this paper we consider this question in the toric setting. We prove that if XX is toric, then there is a unique toric variety YY solving the above interpolation problem. We identify YY in the general case and we explicitly compute some of its invariants when XX is a toric curve.

Keywords

Cite

@article{arxiv.2308.08965,
  title  = {Interpolation of toric varieties},
  author = {Alicia Dickenstein and Sandra Di Rocco and Ragni Piene},
  journal= {arXiv preprint arXiv:2308.08965},
  year   = {2024}
}

Comments

16 pages, 1 figure. A new author has been added to this improved version

R2 v1 2026-06-28T11:57:55.955Z