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On Diagonal Coefficients of C o Operators
Author(s) -
Feintuch Avraham
Publication year - 1978
Publication title -
journal of the london mathematical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.441
H-Index - 62
eISSN - 1469-7750
pISSN - 0024-6107
DOI - 10.1112/jlms/s2-17.3.507
Subject(s) - diagonal , linear subspace , mathematics , contraction (grammar) , invariant (physics) , main diagonal , pure mathematics , combinatorics , mathematical analysis , mathematical physics , geometry , medicine
Let A be a C o contraction such that 1– A * A is compact. Then the point spectrum of A is the set of diagonal coefficients of A relative to a maximal chain of invariant subspaces of A .