On a Barrelled Space of Class ... and Measure Theory.
On a class of difference sequences related to the space defined by Orlicz functions
On a class of nuclear spaces - I
On a class of sequences related to the space defined by a sequence of Orlicz functions
On a class of universal Orlicz function spaces
On a Tensor Product Characterization of Nuclearity.
On bases and the shift operator
On Biorthogonal Systems and Total Sequences of Functionals.
On certain subspaces of a nuclear power series spaces of finite type
On complemented subspaces and unconditional bases in
On complemented subspaces of some Köthe spaces of infinite type.
On complete, precompact and compact sets.
Completeness criterion of W. Robertson is generalized. Applications to vector valued sequences and to spaces of linear mappings are given.
On discrete subspaces of a Hilbert space
On Dragilev type power Köthe spaces
A complete isomorphic classification is obtained for Köthe spaces such that ; here χ is the characteristic function of the interval [0,∞), the function κ: ℕ → ℕ repeats its values infinitely many times, and . Any of these spaces has the quasi-equivalence property.
On generalized paranormed statistically convergent sequence spaces defined by Orlicz function.
On Hardy's inequality and eigenvalue distributions
On ideals of operators and of locally convex spaces.
On inclusion relations between Lorentz sequence spaces and inequalities of Lewis type.
On isomorphic classification of tensor products [Book]
On James and Jordan-von Neumann constants and the normal structure coefficient of Banach spaces
Some relations between the James (or non-square) constant J(X) and the Jordan-von Neumann constant , and the normal structure coefficient N(X) of Banach spaces X are investigated. Relations between J(X) and J(X*) are given as an answer to a problem of Gao and Lau [16]. Connections between and J(X) are also shown. The normal structure coefficient of a Banach space is estimated by the -constant, which implies that a Banach space with -constant less than 5/4 has the fixed point property.