Subspace gaps and Weyl's theorem for an elementary operator.
Putnam-Fuglede theorem and the range-kernel orthogonality of derivations.
On Intertwining Operators.
On Generalised Putnam-Fuglede Theorems.
A Remark on Normal Derivations of Hilbert-Schmidt Type.
Functional Equations and Linear Transformations. IV. Interpolation.
Functional equations and linear transformations - permutability and inversion. (Short Communication).
Weyl's Theorem for a Generalized Derivation and an Elementary Operator
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