Dmitry Valerievich Treschev (on his sixtieth birthday)
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the outstanding researcher, member of the Russian Academy of Sciences Dmitry Treschev observed his 60th birthday.He made a lasting contribution to the dynamics of Hamiltonian systems, perturbation theory, Arnold diffusion, stability, integrability, chaos, and KAM theory.Treschev published more than 110 scientific articles and 3 monographs.Dmitry Valerievich Treschev was born on October 26th 1964, in the town of Olenegorsk in Murmansk Oblast, in a family of a military officer.