Now showing items 1-3 of 3
On invariant subspaces of a normal operator
Our principal interest, in the work that follows, is the discovery of conditions on the spectrum of a normal operator which imply that the operator has invariant non-reducing subspaces. We were led to this study by the ...
On infinitely differentiable solutions of ordinary differential equations
Abstract Not Available.
Some applications of adherent series
The notion of "adherence", or "adherent series" has been created by Mandelbrojt and applied to a number of diverse problems, such as generalized quasianalyticity, the theory of closure of certain sequences of functions, ...