On dual definite subspaces in Krein space

Published 18 Feb 2018 in math.FA, math-ph, and math.MP | (1802.08647v1)

Abstract: Extensions of dual definite subspaces to dual maximal definite ones are described. The concepts of dual quasi maximal subspaces and quasi basis are introduced and studied. The obtained results are applied to the classification of C-symmetries.

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