A definitive majorization result for nonlinear operators

TL;DR

This paper establishes a majorization inequality for nonlinear Garding-Dirichlet operators on symmetric matrices, extending the understanding of their spectral and determinant properties with significant implications.

Contribution

It proves a new majorization inequality for a class of nonlinear operators, generalizing previous results and providing a key tool for further analysis in matrix and operator theory.

Findings

Proves a majorization inequality for Garding-Dirichlet operators.

Extends previous inequalities to a broader class of nonlinear operators.

Highlights applications in spectral and determinant analysis.

Abstract

Let ${\mathfrak g}$ be a Garding-Dirichlet operator on the set S(n) of symmetric $n\times n$ matrices. We assume that ${\mathfrak g}$ is $I$-central, that is, $D_I {\mathfrak g} = k I$ for some $k>0$. Then $$ {\mathfrak g}(A)^{1\over N} \ \geq\ {\mathfrak g}(I)^{1\over N} (\det\, A)^{1\over n} \qquad \forall\, A>0. $$ From work of Guo, Phong, Tong, Abja, Dinew, Olive and many others, this inequality has important applications.