Displaying 2361 – 2380 of 2683

Showing per page

U-ideals of factorable operators

Kamil John (1999)

Czechoslovak Mathematical Journal

We suggest a method of renorming of spaces of operators which are suitably approximable by sequences of operators from a given class. Further we generalize J. Johnsons’s construction of ideals of compact operators in the space of bounded operators and observe e.g. that under our renormings compact operators are u -ideals in the: space of 2-absolutely summing operators or in the space of operators factorable through a Hilbert space.

Un exemple d'ensembles absorbants non équivalents

Robert Cauty (1991)

Fundamenta Mathematicae

We give an example in the Hilbert space 2 of two subsets which are absorbing for the class of topologically complete spaces, but for which there exists no homeomorphism of 2 onto itself mapping one of these subsets onto the other.

Currently displaying 2361 – 2380 of 2683