MATHEMATICAL TOOLS IN ECONOMIC RESEARCH: CONCEPTUAL TRANSFORMATIONS IN THE PERIOD OF PARADIGMAL CHANGES Economic theory Filatova L. D., Ph. D., (Mathematics and Physics), Kharkiv, Peremohy, 55KORZHOVA O. V.September 29, 2021September 29, 2021. This work is licensed under a Creative Commons –Attribution 4.0 International (CC BY 4.0).