Ferrando, J. C.; López Alfonso, Salvador; López Pellicer, Manuel(National Library of Serbia, 2019)
[EN] If R is a ring of subsets of a set Omega and ba (R) is the Banach space of bounded finitely additive measures defined on R equipped with the supremum norm, a subfamily Delta of R is called a Nikodym set for ba (R) if ...
Ferrando, J. C.; López Alfonso, Salvador(Springer-Verlag, 2021-01-04)
[EN] A subset A of a locally convex space E is called (relatively) sequentially complete if every Cauchy sequence {x(n)}(n=1)(infinity) in E contained in A converges to a point x is an element of A (a point x is an element ...
Ferrando, J. C.; Kakol, J.; López Pellicer, Manuel(Elsevier, 2016-08-01)
[EN] The concept of Sigma-base of neighborhoods of the identity of a topological group G is introduced. If the index set Sigma subset of N-N is unbounded and directed (and if additionally each subset of Sigma which is ...