On the convergence of -primitives
On the convexity of high order of sequences.
On the cyclic homogeneous polynomial inequalities of degree four.
On the definition and the lower semicontinuity of certain quasiconvex integrals
On the density maxima of a function
On the density of continuous functions in variable exponent Sobolev space.
On the derivative and maximum modulus of a polynomial.
On the derivative of indefinite RC-integral
On the derivative of type α
On the difference property of Borel measurable functions
If an atomlessly measurable cardinal exists, then the class of Lebesgue measurable functions, the class of Borel functions, and the Baire classes of all orders have the difference property. This gives a consistent positive answer to Laczkovich's Problem 2 [Acta Math. Acad. Sci. Hungar. 35 (1980)]. We also give a complete positive answer to Laczkovich's Problem 3 concerning Borel functions with Baire-α differences.
On the differences of upper semicontinuous quasi-continuous functions
On the differentiability of certain saltus functions
We investigate several natural questions on the differentiability of certain strictly increasing singular functions. Furthermore, motivated by the observation that for each famous singular function f investigated in the past, f’(ξ) = 0 if f’(ξ) exists and is finite, we show how, for example, an increasing real function g can be constructed so that for all rational numbers x and g’(x) = 0 for almost all irrational numbers x.
On the differentiability of multivalued mappings. I.
On the differentiability of multivalued mappings. II.
On the Differentiability of the Coordinate Functions of Póyla's Space-Filling Curve.
On the Differentiability Points of a Function of Two Real Variables Admitting Partial Derivatives.
On the differentiation of convex functions
On the differentiation of convex functions in finite and infinite dimensional spaces
On the differentiation of integrals of functions from Lφ(L)
On the differentiation of integrals of functions from Orlicz classes