Poincaré–Sobolev and isoperimetric inequalities, maximal functions, and half-space estimates for the gradient
Point character of uniformities and completeness
Point derivations and prime ideals in R(X)
Point derivations on algebraic extension of Banach algebra.
Point derivations on the L¹-algebra of polynomial hypergroups
We investigate whether the L¹-algebra of polynomial hypergroups has non-zero bounded point derivations. We show that the existence of such point derivations heavily depends on growth properties of the Haar weights. Many examples are studied in detail. We can thus demonstrate that the L¹-algebras of hypergroups have properties (connected with amenability) that are very different from those of groups.
Points extrémaux dans certains cônes convexes
Points extrêmaux dans un monoide affine semitopologique.
Points extrémaux d'un simplexe compact métrisable
Points extrémaux et densité.
Points extrémaux et propriétés de Radon-Nikodym dans les espaces de Fréchet dentables
Points fixes des contractions de certains faiblement compacts de
Points fixes et théorèmes ergodiques dans les espaces L¹(E)
We prove that for each linear contraction T : X → X (∥T∥ ≤ 1), the subspace F = {x ∈ X : Tx = x} of fixed points is 1-complemented, where X is a suitable subspace of L¹(E*) and E* is a separable dual space such that the weak and weak* topologies coincide on the unit sphere. We also prove some related fixed point results.
Points for symmetry of convex sets in the two-dimensional complex space - A counterexample to D. Yost's problem.
Points minimaux dans les espaces de Banach
Points minimaux dans les espaces de Banach (suite)
Points of diffusion of linear operators and almost diffuse operators in spaces of continuous functions.
Points of weak-norm continuity in the dual unit ball of injective tensor product spaces.
In this note we exhibit points of weak*-norm continuity in the dual unit ball of the injective tensor product of two Banach spaces when one of them is a G-space.
Pointwise absolutely convergent series of operators and related classes of Banach spaces
We study classes of operators represented as a pointwise absolutely convergent series of simpler ones, starting with rank 1 operators. In this short note we address the question, how far the repetition of this procedure can lead.
Pointwise and global sums and negatives of binary relations.
Pointwise and integral estimates for the -Riesz potential in terms of -maximal and -fractional maximal functions.