机译:On the interplay between operators, bases, and matrices
Czech Acad Sci;
Polish Acad Sci;
Matrix representations; Hilbert space operators; Bases; Diagonals; Numerical range; ESSENTIAL NUMERICAL RANGE; SCHUR-HORN THEOREM; ORTHOGONAL POLYNOMIALS; PYTHAGOREAN THEOREM; DIAGONALS; COMMUTATORS; COMPRESSIONS; SPECTRUM; NORMS; ZEROS;