Strict differentiability via differentiability
Let be a completely regular Hausdorff space, the space of all scalar-valued bounded continuous functions on with strict topologies. We prove that these are locally convex topological algebras with jointly continuous multiplication. Also we find the necessary and sufficient conditions for these algebras to be locally -convex.
The Radon spaces of type (T), i.e., topological spaces for which every finite Borel measure on Omega is T-additive and T-regular are characterized. The class of these spaces is very wide and in particular it contains the Radon spaces. We extend the results of Marczewski an Sikorski to the sygma-metrizable spaces and to the subsets of the Banach spaces endowed with the weak topology. Finally, the completely additive families of measurable subsets related with the works of Hansell, Koumoullis, and...
Results on integration by parts and integration by substitution for the variational integral of Henstock are well-known. When real-valued functions are considered, such results also hold for the Generalized Riemann Integral defined by Kurzweil since, in this case, the integrals of Kurzweil and Henstock coincide. However, in a Banach-space valued context, the Kurzweil integral properly contains that of Henstock. In the present paper, we consider abstract vector integrals of Kurzweil and prove Substitution...
En liaison avec le théorème d’Orlicz-Pettis, on étudie la plus fine topologie localement convexe sur un elc pour laquelle toute mesure définie sur une tribu et à valeurs dans est -bornée. Pour cela, on considère l’espace des formes linéaires sur telles que, pour toute suite sous-série convergente de , on ait . La topologie coïncide avec la topologie de Mackey ; elle est bornologique et tonnelée, mais ce n’est pas la topologie bornologique et tonnelée associée à . Ce point est...
On définit un filtre coanalytique sur les entiers tel que pour tout convexe compact métrisable , les fonctions boréliennes fortement affine sur , i.e. vérifiant les égalités barycentriques, soient exactement les limites simples suivant ce filtre de suites de fonctions affines continues sur .