English

A minimal resolution for the Jacobian ideal of a generic curve arrangement

Algebraic Geometry 2025-08-11 v3 Commutative Algebra

Abstract

We consider a nodal curve CC in the complex projective plane whose irreducible components CiC_i are smooth. A minimal set of generators GG for the first and second syzygy modules of the Jacobian ideal of CC are described, using recent results by Th. Kahle, H. Schenck, B. Sturmfels and M. Wiesmann on the likelihood correspondence. The elements of GG have explicit formulas in terms of the equations fi=0f_i=0 of the irreducible components CiC_i of CC. Similar results, including extensions to hypersurfaces arrangements in Pn\mathbb{P}^n were obtained by R. Burity, Z. Ramos, A. Simis and St. Toh\u aneanu with a genericity assumption which may not be easy to test in practice.

Keywords

Cite

@article{arxiv.2508.04439,
  title  = {A minimal resolution for the Jacobian ideal of a generic curve arrangement},
  author = {Alexandru Dimca and Gabriel Sticlaru},
  journal= {arXiv preprint arXiv:2508.04439},
  year   = {2025}
}

Comments

v3. Theorems 1.4, 1.5 and 1.6 are new