Sums of Idempotents and Logarithmic Residues in Matrix Algebras
Harm Bart, Torsten Ehrhardt, Bernd Silbermann · Birkhäuser Basel eBooks · 2001
Logarithmic residues are contour integrals of logarithmic derivatives of vector-valued analytic functions. In several matrix algebras, the set of logarithmic residues coincides with the set of sums of idempotents. The connected components of this set are identified.