ISSN 2304-0122

Ufa Mathematical Journal publishes original research papers on the theory of functions, complex analysis, ordinary differential equations, partial differential equations, mathematical physics, probability theory and mathematical statistics. It is intended for researchers, teachers, postgraduate and undergraduate students. The journal publishes four regular issues each year. We publish papers written in Russian or English which generally comprise up to 40 printed pages. Papers exceeding 40 printed pages can be accepted for publication by a special decision of the Editorial board.

Full text articles published in the journal are also available for free open access on the official sites of the Institute of Mathematics with Computer Center of RAS , the Scientific Electronic

Ufa Mathematical Journal is currently indexed in Scopus and Web of Science. Library, and the All-Russian Mathematical Portal Math-Net.Ru.

The articles are refereed in Zentralblatt MATH (ZBMATH) and MathSciNet.

Publication of articles is free of charge for the authors.

**Editor in Chief**

Musin Il'dar Khamitovich - Doctor of Physical and Mathematical Sciences, Ufa

**Deputy Editors**

Gazizov Rafail Kavyevich - Professor, Doctor of Physical and Mathematical Sciences, Ufa

Yulmukhametov Rinad Salavatovich - Professor, Doctor of Physical and Mathematical Sciences, Ufa

**Editorial Board**

Amosov Grigori Gennadievich – Doctor of Physical and Mathematical Sciences, Moscow

Akimova Elena Nikolaevna – Professor, Doctor of Physical and Mathematical Sciences, Ekaterinburg

Alkhutov Yuriy Alexandrovich – Professor, Doctor of Physical and Mathematical Sciences, Moscow

Baranov Anton Dmitrievich – Doctor of Physical and Mathematical Sciences, Sain-Petersburg

Bobkov Vladimir Evgenievich – Candidate of Physical and Mathematical Sciences, Ufa

Borisov Denis Ivanovich – Doctor of Physical and Mathematical Sciences (Executive Secretary), Ufa

Danilin Aleksei Rufimovich – Professor, Doctor of Physical and Mathematical Sciences, Ekaterinburg

Fazullin Ziganur Yusupovich – Associate Professor, Doctor of Physical and Mathematical Sciences, Ufa

Gaisin Ahtyar Magazovich – Professor, Doctor of Physical and Mathematical Sciences, Ufa

Gomoyunov Mikhail Igorevich – Candidate of Physical and Mathematical Sciences, Ekaterinburg

Habibullin Ismagil Talgatovish – Professor, Doctor of Physical and Mathematical Sciences, Ufa

Kalyakin Leonid Anatol'evich – Professor, Doctor of Physical and Mathematical Sciences, Ufa

Khabibullin Bulat Nurmievich – Professor, Doctor of Physical and Mathematical Sciences, Ufa

Kordyukov Yuri Arkad'evich – Associate Professor, Professor, Doctor of Physical and Mathematical Sciences, Ufa

Lukashchuk Stanislav Yur'evich – Associate Professor, Doctor of Physical and Mathematical Sciences, Ufa

Mukminov Farit Khamzaevich – Professor, Doctor of Physical and Mathematical Sciences, Ufa

Napalkov Valentin Vasil’evich – Corresponding Member of RAS, Professor, Doctor of Physical and Mathematical Sciences, Ufa

Nasyrov Farit Sagitovich – Professor, Doctor of Physical and Mathematical Sciences, Ufa

Sakbaev Vsevolod Zhanovich – Professor, Doctor of Physical and Mathematical Sciences, Моscow

Sukhov Alexandre Borisovich – Candidate of Physical and Mathematical Sciences, Ufa

Sultanaev Yaudat Talgatovich – Professor, Doctor of Physical and Mathematical Sciences, Ufa

Surnachev Mikhail Dmitrievich – Doctor of Physical and Mathematical Sciences, Моscow

Vedenyapin Igor Eduardovich – Candidate of Technical Sciences (Executive Secretary), Ufa

Zhiber Anatoly Vasilievich – Professor, Doctor of Physical and Mathematical Sciences, Ufa

V.Ya. Eiderman (USA)

Deng Guantie (China)

M. Gurses (Turkey)

Yu.I. Lyubarskii (Norway)

F.M. Mahomed (South Africa)

S.V. Meleshko (Thailand)

A. Montes Rodríguez (Spain)

A.G. Poltoratski (USA)

M. Sodin (Israel)

A. Vidras (Cyprus)

**Technical Editors:**

Garifullin Rustem Nailevich - Candidate of Physical and Mathematical Sciences, Ufa

Khakimova Aigul Rinatovna - Candidate of Physical and Mathematical Sciences, Ufa