On a class of double sequence transformations
Power series spaces of finite type and related nuclearities
A generalization of the mean ergodic theorem
Subspaces of smooth sequence spaces
Coincidence of topologies on tensor products of Köthe echelon spaces
We investigate conditions under which the projective and the injective topologies coincide on the tensor product of two Köthe echelon or coechelon spaces. A major tool in the proof is the characterization of the επ-continuity of the tensor product of two diagonal operators from to . Several sharp forms of this result are also included.
On -nuclearity
Bounded and unbounded operators between Köthe spaces
We study in terms of corresponding Köthe matrices when every continuous linear operator between two Köthe spaces is bounded, the consequences of the existence of unbounded continuous linear operators, and related topics.
On iteration products preserving absolute convergence.
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