# A wall-crossing formula and the invariance of GLSM correlation functions

## TL;DR

This paper proves a wall-crossing formula essential for demonstrating that GLSM correlation functions remain invariant under different perturbations, advancing understanding in mathematical physics.

## Contribution

It introduces a wall-crossing formula that ensures the invariance of GLSM correlation functions across perturbation choices.

## Key findings

- Established a wall-crossing formula for GLSM
- Proved invariance of correlation functions
- Supports robustness of GLSM in mathematical physics

## Abstract

In this paper we prove a wall-crossing formula, a crucial ingredient needed to prove that the correlation function of gauged linear sigma model is independent of the choice of perturbations.