Linear operators permutable with a projector
We shall need some auxiliary theorems on projectors Proj a = (Proja), i.e. operators which project orthogonally the whole Hilbert-Hermite-space H on a given (closed) subspace a. Some preliminaries, recollections of notions and the meaning of notions will be in order.
KeywordsEffective Measure Orthogonal Complement Classical Setting Mathematical Apparatus Linear Manifold
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