Alemdar Hasanov Hasanoğlu is a professor of mathematics at Kocaeli University in Türkiye. Roman Novikov is a Directeur de recherche at CNRS-Centre National de la Recherche Scientifique at École polytechnique CMAP-Centre de Mathématiques Appliquées, France. Karel Van Bockstal is a post-doctoral researcher (Ghent Analysis & PDE Center) at the Department of Mathematics: Analysis, Logic and Discrete Mathematics of Ghent University, Belgium.