New conditions for matching adjacent cross-sections of the commutant manifold are derived for upper triangular operator-matrices using canonical mappings and cyclicity.
K\'erchy : On hyperinvariant subspaces of operators containing unilateral shifts, submitted
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Adjacent cross-sections of the commutant of Hilbert space operators
New conditions for matching adjacent cross-sections of the commutant manifold are derived for upper triangular operator-matrices using canonical mappings and cyclicity.