On the sequential order continuity of the -space.
On the sets of sequences that are strongly -bounded and -convergent to naught with index .
On the smoothness of Orlicz sequence spaces equipped with Orlicz norm.
We give a criterion of smoothness of Orlicz sequence spaces with Orlicz norm.
On the Space C(X,E) with the Topology of Simple Convergence.
On the space of -summable sequences
On the splitting of twisted sums, and the three space problem for local convexity
On the strict convexity of the polar operator
On the strong lacunary convergence and strong Cesàro summability of sequences of real-valued functions.
On the structure of fixed point sets of some compact maps in the Fréchet space
The aim of this note is 1. to show that some results (concerning the structure of the solution set of equations (18) and (21)) obtained by Czarnowski and Pruszko in [6] can be proved in a rather different way making use of a simle generalization of a theorem proved by Vidossich in [8]; and 2. to use a slight modification of the “main theorem” of Aronszajn from [1] applying methods analogous to the above mentioned idea of Vidossich to prove the fact that the solution set of the equation (24), (25)...
On the structure of G-spaces
On the structure of support point sets.
On the structure of the dual complexity space: The general case.
On the Sublinear Functional Associated to a Family of Invariant Means.
On the subspaces of Fréchet Montel spaces and of the strong duals of Fréchet Montel spaces.
On the sum and difference of two sets in topological vector spaces
On the support of midconvex operators.
On the support of midconvex operators. (Summary).
On the Sz.-Nagy boundedness condition on abelian involution semigroups
On the tangency of multifunctions
On the three-space problem and the lifting of bounded sets.
We exhibit a general method to show that for several classes of Fréchet spaces the Three-space-problem fails. This method works for instance for the class of distinguished Fréchet spaces, for Fréchet spaces with the density condition and also for dual Fréchet spaces (which gives a negative answer to a question of D. Vogt). An example of a Banach space, which is not a dual Banach space but the strong dual of a DF-space, shows that there are two real different possibilities of defining the notion...