# Matematychni Studii Vol. 49, No.1, 2018

## CONTENTS

 Title 1
 Contents 2
 Intertwining maps for the Weitzenbock and Chebyshev derivations Bedratyuk L., Lunio N. 3
 A note on bornologies Protasov I. V. 13
 On locally compact semitopological graph inverse semigroups Bardyla S. 19
 Wiman's type inequality for multiple power series in the unbounded cylinder domain Kuryliak A., Tsvigun V. 29
 Sandwich results for higher order fractional derivative operators Zayed H. M., Bulboaca T. 52
 Vector-valued bivariate entire functions of bounded index satisfying a system of differential equations Nuray F., Patterson R. F. 67
 Analytic functions in the unit ball of bounded value $L$-distribution in a direction Bandura A. I. 75
 Nonlocal multipoint problem for an ordinary differential equations of even order involution Baranetskij Ya. O., Kalenyuk P. I., Kolyasa L. I., Kopach M. I. 80
 Infinite-modal approximate solutions of the Bryan-Pidduck equation Hukalov O. O., Gordevskyy V. D. 95

## PROBLEM SECTION

 Progress in the open problems in theory of functions of bounded index Skaskiv O. B. 109

Matematychni Studii
matstud.org.ua