## Tbilisi Mathematical Journal

The Tbilisi Mathematical Journal (TMJ) is a fully refereed international journal, publishing original research papers in all areas of mathematics. The Editorial Board of TMJ consists of well-known international experts in the fields covering most important areas of mathematics. The editors and a rigorous refereeing procedure will ensure the highest international standards and quality. The Editorial Board may occasionally decide to invite the submission of survey and expository papers of the highest quality. Unsolicited submissions of survey and expository papers will not be considered for publication.

TMJ is published by the Tbilisi Centre for Mathematical Sciences (TCMS), a non-governmental and non-profit independent academic institution founded in November 2008 in Tbilisi, Georgia.

Stability and non-stability of generalized radical cubic functional equation in quasi-$\beta$-Banach spacesVolume 12, Issue 3 (2019)