The determinant of the sum of two normal matrices with prescribed eigenvalues

Bounds for the determinant of the sum of hermitian matrices

Miroslav Fiedler · Proceedings of the American Mathematical Society · 1971 · 139 citations · Full text

Computing, Computer Science, Theory Of Computation +5

Elementary inclusion relations for generalized numerical ranges

Moshe Goldberg, E. G. Straus · Linear Algebra and its Applications · 1977 · 116 citations

Computing, Computational Engineering, Mathematics +4

On eigenvalues of sums of normal matrices

Helmut Wielandt · Pacific Journal of Mathematics · 1955 · 81 citations · Full text

Natural Sciences, Classics, Representation Theory +7

On the shape of the generalized numerical ranges

Nam‐Kiu Tsing · Linear and Multilinear Algebra · 1981 · 43 citations

Natural Sciences, Mathematics, Combinatorics +5

Normality and the Higher Numerical Range

Marvin Marcus, Benjamin N. Moyls, Ivan Filippenko · Canadian Journal of Mathematics · 1978 · 31 citations · Full text

Computing, Computer Science, Algorithms +6