On qualitative cluster sets
On quasicontinuous and cliquish functions
On quasi-continuous bijections.
On quasi-continuous functions having Darboux property.
On quasi-continuous iteration semigroups and groups of real functions
On quasi-uniform convergence of a sequence of s.q.c. functions
On realizability of sign patterns by real polynomials
The classical Descartes’ rule of signs limits the number of positive roots of a real polynomial in one variable by the number of sign changes in the sequence of its coefficients. One can ask the question which pairs of nonnegative integers , chosen in accordance with this rule and with some other natural conditions, can be the pairs of numbers of positive and negative roots of a real polynomial with prescribed signs of the coefficients. The paper solves this problem for degree polynomials.
On refinements of Aczél, Popoviciu, Bellman's inequalities and related results.
On refinements of certain inequalities for means
In this paper we obtain certain refinements (and new proofs) for inequalities involving means, results attributed to Carlson; Leach and Sholander; Alzer; Sndor; and Vamanamurthy and Vuorinen.
On Regularly Varying Functions With Applications To Functions Theory.
On relations among metric derived numbers
On relations among the generalized second-order directional derivatives
In the paper, we deal with the relations among several generalized second-order directional derivatives. The results partially solve the problem which of the second-order optimality conditions is more useful.
On relations of coefficient conditions.
On representation formulars for intermediate derivates.
On representations of Baire functions in a given family as sums of Baire Darboux functions with a common summand
On representations of some Perron integrable functions
On results of Jan Mařík in the theory of derivatives
Results of Jan Marik on the theory of derivatives of real functions are described.
On reverse Hardy's inequality.
On reverses of some inequalities in -inner product spaces.
On Riemann-Liouville and Caputo derivatives.