ISSN 2579-2784 (Print)
ISSN 2738-2788 (Online)
Sc.D., Yerevan, Armenia
Printed on the basis of decision N 19-12/1 of session of the Scientific Council of IIAP NAS RA dated December 12, 2019.
This issue of the Periodical is dedicated to the 80-th anniversary of Hrant B. Marandjyan, Doctor of Physical and Mathematical Sciences, Professor, Corresponding Member of NAS RA, Academician of the Russian Academy of Natural Sciences.