A variant of Jessen's inequality of Mercer's type for superquadratic functions.
A version of Hilbert's 13th problem for infinitely differentiable functions.
A Volterra inequality with the power type nonlinear kernel.
A walk through nonstandard analysis on the paths of A. Robinson. (Balade en analyse non standard sur les traces de A. Robinson.)
A weighted estimate for an intermediate operator on the cone of nonnegative functions.
A weighted inequality for derivatives on the half-line.
A weighted inequality for the Hardy operator involving suprema
Let be a weight on . Assume that is continuous on . Let the operator be given at measurable non-negative function on by We characterize weights on for which there exists a positive constant such that the inequality holds for every . Such inequalities have been used in the study of optimal Sobolev embeddings and boundedness of certain operators on classical Lorenz spaces.
A weighted isoperimetric inequality and applications to symmetrization.
A well-rounded linear function.
A -porous set need not be -bilaterally porous
A closed subset of the real line which is right porous but is not -left-porous is constructed.
Abel's equation and regular growth: Variations on a theme by Abel.
About a man and lions
About a non-homogeneous Hardy-inequality and its relation with the spectrum of Dirac operators
A non-homogeneous Hardy-like inequality has recently been found to be closely related to the knowledge of the lowest eigenvalue of a large class of Dirac operators in the gap of their continuous spectrum.
About an estimation problem of Zahorski
About an intermediate point property in some quadrature formulas.
About -adic interpolation of continuous and differentiable functions
About solutions of a functional equation.
About some properties of intermediate point in certain mean-value formulas.
About the existence and uniqueness of solution to fractional Bürger's equation.
About the Maximum and the Minimum of Darboux Functions