Bounds for absolute values and imaginary parts of matrix eigenvalues via traces
Michael I. Gil’ · Proyecciones (Antofagasta) · 2022
Let λ1(A), λ2(A), ..., λn(A) be the eigenvalues of an n × n-matrix A taken with their algebraic multiplicities. We suggest new bounds for |λj (A) − trace(A)/ n | and |Im λj (A) − Im trace(A)/n | (j = 1, ..., n), which refine the previously published results.