A new eigenvalue bound for the Hadamard product of an M-matrix and an inverse M-matrix
Fubin Chen, Yaotang Li, Defeng Wang · Electronic Journal of Linear Algebra · 2012
Abstract. If A and B are n×n nonsingular M-matrices, a new lower bound for the minimum eigenvalue τ(A◦B −1) for the Hadamard product of A and B −1 is derived. This bound improves the result of [R. Huang. Some inequalities for the Hadamard product and the Fan product of matrices.