Helene Shapiro

Positive input reachability and controllability of positive systems

Pamela G. Coxson, Helene Shapiro · Linear Algebra and its Applications · 1987 · 117 citations

Engineering, Mathematical Control Theory, Systems Engineering +4

A survey of canonical forms and invariants for unitary similarity

Helene Shapiro · Linear Algebra and its Applications · 1991 · 47 citations

Representation Theory, Matrix Analysis, Similarity Measure +4

Mathematical Aspects of the Relative Gain Array $( A \circ A^{ - T} )$

Charles R. Johnson, Helene Shapiro · SIAM Journal on Algebraic and Discrete Methods · 1986 · 43 citations

Mathematical Aspects, Relative Gain Array, Inverse Images +8

The Weyr Characteristic

Helene Shapiro · American Mathematical Monthly · 1999 · 40 citations

Theoretical Mathematics, Visual Language, Representation Theory +4

Simultaneous block triangularization and block diagonalization of sets of matrices

Helene Shapiro · Linear Algebra and its Applications · 1979 · 29 citations

Spectral Theory, Engineering, Total Unimodularity +6