The Di Francesco-Itzykson-G\"ottsche Conjectures for Node Polynomials of $\mathbb{P}^{2}$

TL;DR

This paper proves the Di Francesco-Itzykson-G"ottsche conjectures for node polynomials on the projective plane, expressing counts of r-nodal curves via universal functions related to Chern numbers, and provides a recursive method for certain polynomial terms.

Contribution

It establishes a proof of classical conjectures on node polynomials for , using Bell polynomials and universal functions, and introduces a recursive procedure for polynomial coefficients.

Findings

Confirmed the shape conjectures for  node polynomials.

Derived explicit formulas for universal functions in terms of Chern numbers.

Developed a recursive method for computing specific polynomial coefficients.

Abstract

For a smooth, irreducible projective surface S over \mathbb{C}, the number of r-nodal curves in an ample linear system |L| (where L is a line bundle on S) can be expressed using the rth Bell polynomial P_{r} in r universal functions a_{i} of (S,L), which are linear polynomials in the four Chern numbers of S and L. We use this result to establish a proof of the classical shape conjectures of Di Francesco-Itzykson and G\"ottsche governing node polynomials in the case of P^{2}. We also give a recursive procedure which provides the L^{2}-term of the polynomials a_{i}.