Hyperinvariant Subspace Problem for Some Classes of Operators
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DOI: 10.1007/s00009-018-1230-9
Abstract: An n-normal operator may be defined as an $$n \times n$$n×n operator matrix with entries that are mutually commuting normal operators and an operator $$T \in \mathcal {B(H)}$$T∈B(H) is quasi-nM-hyponormal (for $$n \in \mathbb {N}$$n∈N)… read more here.
Keywords: hyperinvariant subspace; operator matrix; subspace problem;