On Choquet's theory
On Ciesielski's problems.
On classification of real singularities.
On cluster sets of arbitrary functions
On common fixed and periodic points of commuting functions.
On common fixed points, periodic points, and recurrent points of continuous functions.
On complete measurability of multifunctions defined on product spaces.
On completeness of left-invariant Lorentz metrics on solvable Lie groups.
We study geodesic completeness for left-invariant Lorentz metrics on solvable Lie groups.
On compositions and products of almost continuous functions
On Condition Numbers and the Distance to the Nearest Ill-posed Problem.
On conditions for the boundedness of the Weyl fractional integral on weighted spaces
In this paper we give a sufficient condition on the pair of weights for the boundedness of the Weyl fractional integral from into . Under some restrictions on and , this condition is also necessary. Besides, it allows us to show that for any there exist non-trivial weights such that is bounded from into itself, even in the case .
On connectivity points
On connectivity points of Darboux functions
On continuity and monotonicity of Darboux functions
On continuity and monotonicity of Darboux transformations.
On continuous convex or concave functions with respect to the logarithmic mean
On continuous functions and the approximate symmetric derivatives
On continuous functions with no unilateral derivatives
We construct a family of continuous functions on the unit interval which have nowhere a unilateral derivative finite or infinite by using De Rham’s functional equations. Then we show that for any
On continuous interval functions
On Continuous Solutions of a Functional Inequality.