On expansions of prime and 2-absorbing hyperideals in multiplicative hyperrings
Tomasz NATKANIEC, Waldemar SIEG
Urszula BEDNARZ, Ma?gorzata WO?OWIEC-MUSIA?
On Wiener’s Tauberian theorems and convolution for oscillatory integral operators
Rita Correia GUERRA, Luis Pinheiro de CASTRO, Nguyen Minh TUAN
On the solvability of the main boundary value problems for a nonlocal Poisson equation
Valery V. KARACHIK, Abdizhahan M. SARSENBI, Batirkhan K. TURMETOV
Generalized helices in three-dimensional Lie groups
Alexander YAMPOLSKY, Anastasiya OPARIY
On positive periodic solutions of second-order semipositone differential equations