Volume 43, Issue 1

Part 1: “Differential Equations and Geometric Structures” (Based on Materials of Special Sessions “Differential Equations and Geometric Structures” of the “Mathematical Congress of the Americas 2021” and “Ecuaciones Diferenciales y Estructuras Geométricas” of “VI Congreso Latinoamericano de Matemáticos 2021”), Editors: John Alexander Arredondo García (Bogotá, Colombia), Ronaldo Alves García (Goiânia, Brasil), Mikhail Malakhaltsev (Bogotá, Colombia), and Jesús Muciño Raymundo (Morelia, México). Part 2: “Modern Problems of Mathematical Physics, Optimal Control and the Theory of Differential Equations”, Editors: A.T. Assanova, T.K. Yuldashev and M.G. Yumagulov