Igor Parasyuk

Igor Parasyuk is a Professor and current Head of the Department of Geometry, Topology and Dynamical Systems at the Faculty of Mechanics and Mathematics, Taras Shevchenko National University of Kyiv, Ukraine. He has held various academic positions at the university since 1978, including Assistant Professor (1978–1986), Associate Professor (1986–1991, 1994–1996), and Professor (1996–2017).

• BSc + MSc (1970–1975)
• PhD (1975–1979)
• Doctor of Physical and Mathematical Sciences (1991–1994, 1995)

His research focuses on nonlinear dynamical systems, particularly in the theory of multifrequency nonlinear oscillations, KAM-theory, invariant manifolds, singular boundary value problems for ordinary differential equations on semi-axis, dynamic bifurcations in fast-slow systems, and bounded/quasiperiodic solutions of indefinite monotone systems on Riemannian manifolds. His work includes groundbreaking theorems on conservation of multifrequency quasi-periodic motions under perturbations and discovery of Hamiltonian systems with non-exact symplectic structures.

Recent publications highlight advancements in Hamiltonian dynamics, quasiperiodic solutions, and geometric analysis. Key subfields include perturbation theory, symplectic geometry, and stability analysis of nonlinear systems.

He collaborates with institutions such as the Institute of Mathematics NAS of Ukraine and the Austro-Ukrainian Institute for Science and Technology (AUI), TU Wien. His research team includes DSc holders, professors, and PhD students specializing in nonlinear dynamics and differential equations.