, Mykhailo Kotsiubynskyi State Pedagogical University, Vinnytsia, Ukraine (Ukraine)
, Department of Mathematics and Informatics, Institute of Postgraduate Education, City Uzhgorod, Ukraine
, Department of Mathematics and Informatics, Transcarpathian Hungarian Institute by Ferenc Rakoczy II, City Beregovo, Ukraine
, Department of Mechanics and Mathematics, Taras Shevchenko National University of Kyiv, Kyiv, Ukraine

, Donetsk Regional Center for Educational Quality Assessment, Ukraine
, V. N. Karazin Kharkiv National University, Kharkiv, Ukraine
, Institute of Mathematics, National Academy of Sciences, Ukraine
, Faculty of Informatics, National University of "Kyiv-Mohyla Academy", Kyiv, Ukraine (Ukraine)
, Institute of Mathematics, and Computer Science, Kishinew, Moldova (Moldova, Republic of)
, Department of Specialized Computer Systems, Lviv Polytechnic National University, Lviv, Ukraine (Ukraine)
, Department of Specialized Computer Systems, Lviv Polytechnic National University, Lviv, Ukraine
, Institute of Mathematics of NASU, National Pedagogical Dragomanov University
, Institute of Mathematics of NASU, National Pedagogical Dragomanov University, Kyiv, Ukraine
, Department of Algebra, IAPMM NAS of Ukraine, L’viv, Ukraine
, Department of ontological systems and applied algebraic combinatorics, Institute of Telecommunications and the Global Information Space of the National Academy of Sciences of Ukraine (ITGIP NAS of Ukraine), Kyiv, Ukraine
, Department of Physical and Mathematical Sciences, National University "Kyiv-Mohyla Academy", Kyiv, Ukraine (Ukraine)
, Department of Geometry and Algebra, Oles Honchar Dnipro National University, Dnipro, Ukraine

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