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math.RA2002
Slices of matrices - a scenario for spectral theory
Ricardo S. Leite, Carlos Tomei
Given a real, symmetric matrix S, we define the slice through S as being the connected component containing S of two orbits under conjugation: the first by the orthogonal group, an…
math.RA2001
Parametrization by polytopes of intersections of orbits by conjugation
Ricardo S. Leite, Carlos Tomei
Let S be an nXn real symmetric matrix with spectral decomposition S=Q^T Lambda Q, where Q is an orthogonal matrix and Lambda is diagonal with simple spectrum {lambda_1,..., lambda_…