On the summation of absolute value of the eigenvalues of signed graphs

سیده الهام قاسمیان,غلامحسین فتح تبار فیروزجائی

Authors	سیده الهام قاسمیان,غلامحسین فتح تبار فیروزجائی
Conference Title	The Second Conference on Computational Group Theory, Computational Number Theory and Applications,
Holding Date of Conference	۲۰۱۵-۹-۱۲
Event Place	کاشان
Presentation	SPEECH
Conference Level	National Conferences

Abstract

Let G = (G;s) be a signed graph, where G = (V;E) is the underlying simple graph and s :E(G) to {-1, +1} is the sign function. In this paper we consider the spectral characterization of signed graphs. We obtain some lower bounds for summation of absolute value of the A- eigenvalues of signed graphs.