A lower bound for the Estrada index of a Hermitian matrix

Rao Li

Abstract


Gungor et al [6] introduced the concept of the Estrada index fora Hermitian matrix. Let H be a Hermitian matrix of order n with eigenvalues1 2 n. The Estrada index EE(H) of H isdened asPni=1 ei

Keywords


Hermitian Matrix; The Estrada Index