THE BOURBAKI DEGREE OF A PLANE PROJECTIVE CURVE

Author(s)

Jardim, Marcos ; Nejad, Abbas nasrollah ; Simis, Aron

• Document type: Journal article
• Source: TRANSACTIONS OF THE AMERICAN MATHEMATICAL SOCIETY; v. N/A, p. 23-pg., 2024-09-10.

Abstract

. Bourbaki sequences and Bourbaki ideals have been studied by several authors since its inception sixty years ago circa. Generic Bourbaki sequences have been thoroughly examined by the senior author with B. Ulrich and W. Vasconcelos, but due to their nature, no numerical invariant was introduced the Bourbaki number in the category of graded modules as the shifted degree of a Bourbaki ideal corresponding to submodules generated in degree at least the maximal degree of a minimal generator of the given module. The present work introduces the Bourbaki degree as the algebraic multiplicity of a Bourbaki ideal corresponding to choices of minimal generators of minimal degree. The main intent is a study of plane curve singularities via this new numerical invariant. Accordingly, quite naturally, the focus is on the case where the standing graded module is the first syzygy module of the gradient ideal of a reduced form f is an element of k[x, y, z] - i.e., the main component of the module of logarithmic derivations of the corresponding curve. The overall goal of this project is to allow for a facet of classification of projective plane curves based on the behavior of this new numerical invariant, with emphasis on results about its lower and upper bounds. (AU)

• FAPESP's process: 22/09853-5 - The Aluffi Algebras and Free Divisors
• Grantee: Marcos Benevenuto Jardim
• Support Opportunities: Research Grants - Visiting Researcher Grant - International
• FAPESP's process: 18/21391-1 - Gauge theory and algebraic geometry
• Grantee: Marcos Benevenuto Jardim
• Support Opportunities: Research Projects - Thematic Grants