Taras A. Mel'nyk is a professor of the department of mathematical physics at Taras Shevchenko National University of Kyiv. He is a fellow of the Alexander von Humboldt Foundation and a member of the American Mathematical Society. In his teaching, he has developed special courses on a range of topics such as asymptotic methods in mathematical physics, the theory of homogenization, the theory of Sobolev spaces, complex analysis and nonlinear analysis. He has published widely and has authored the monograph Multiple-Scale Analysis of Boundary-Value Problems in Thick Multi-Level Junctions of Type 3:2:2 (Springer, 2019) and two textbooks Complex Analysis (2015, in Ukrainian) and Sobolev Space Theory and Weak Solutions of Boundary Value Problems (2018, in Ukrainian). His research interests are related to asymptotic analysis of boundary-value problems, spectral problems, variational inequalities, optimal control problems, convection-diffusion problems in domains with complex micro-inhomogeneous structures (perforated materials, composite materials, thick multi-structures, domains with rapidly oscillating boundaries, domains with concentrated masses, thin domains, thin graph-like junctions).