Anatolii Iserovish Neishtadt

Anatolii Iserovish Neishtadt, a prominent researcher and outstanding expert in the theory of perturbations of dynamical systems and the theory of adiabatic invariants, observed his 70th birthday on 27 July 2020. He was born in Moscow in the family of a chemical engineer and a flight technician (his mother). As a high-school senior he attended lessons at a voluntary evening physicsmathematics school under the auspices of the Bauman Moscow State Technical School (now Technical University), from which he graduated with honours. In 1967 he graduated from Moscow school no. 358 with a gold medal and enrolled in the Faculty of Mechanics and Mathematics at Lomonosov Moscow State University. He was a student in the Department of Theoretical Mechanics, where M. L. Lidov was his scientific advisor. Neishtadt graduated from the university with distinction and, after defending his diploma thesis, was admitted to postgraduate studies in the faculty, where in 1975 he presented, and in 1976 defended, his Ph.D. thesis “Some resonance problems in non-linear systems”, written under the supervision of Lidov. From 1975 to 1987 Neishtadt worked in the All-Union Scientific Research Institute of Medical Instrument Design, where his work involved applied programming. Apart from his duties there, he continued active research in mathematics, working on some problems posed by V. I. Arnold. In 1989 Neishtadt defended his D.Sc. thesis “Questions of perturbation theory for non-linear resonance systems” in the Faculty of Mechanics and Mathematics at Moscow State University. In 1987 he was hired on Arnold’s recommendation by the Institute of Space Research, as a researcher in G. M. Zaslavsky’s laboratory (subsequently, department). Neishtadt then worked there for a long time as head of the Laboratory of Non-Linear and Chaotic Dynamics, and is currently a leading researcher at the institute.