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Infinite-dimensional perturbations, maximally nondensely defined symmetric operators, and some matrix representations

Hassi, Seppo; de Snoo, H.S.V.; Szafraniec, F.H. (ElsevierRoyal Netherlands Academy of Arts and Sciences (KNAW), 12 / 2012)
article

The notion of a maximally nondensely defined symmetric operator or relation is introduced and characterized. The selfadjoint extensions (including the generalized Friedrichs extension) of a class of maximally nondensely ...