Mathematical Events

Yuri Nikolaevich Deryugin - on his seventieth birthday

P. A. Vel'misov^a, R. V. Zhalnin^b, V. T. Zhukov^c, T. K. Kozubskaya^c, P. V. Senin^b, L. I. Sizova^d, L. A. Sukharev^b, V. F. Tishkin^c, B. N. Chetverushkin^c, I. I. Chuchaev^b, R. M. Shagaliev^d, P. A. Shamanaev^b, V. N. Shchennikov<sup>b

a</sup> Ulyanovsk State Technical University
^b Ogarev Mordovia State University, Saransk
^c Keldysh Institute of Applied Mathematics of Russian Academy of Sciences, Moscow
^d Federal State Unitary Enterprise "Russian Federal Nuclear Center — All-Russian Research Institute of Experimental Physics", Sarov, Nizhny Novgorod region