# Ivan I. Kyrchei

Dr. Ivan Kyrchei received an MSc in mathematics from Ivan Franko National University, Lviv, Ukraine in 1992, a Ph.D. from Taras Shevchenko National University, Kyiv, Ukraine in 2008, and a DSc in algebra and theory numbers from the NASU Institute of Mathematics, Kyiv in 2021. He is currently the Lead Researcher at NASU’s Pidstryhach Institute for Applied Problems of Mechanics and Mathematics (IAPMM), Ukraine, where he has worked for more than 20 years. He has published more than 100 papers in scientific journals and international conference proceedings on the theory of quaternion matrix equations, generalized inverse matrices, and functionals of matrices over quaternion algebras. He is also the editor of three books and a member of the editorial boards of five international scientific journals.