1h. - Scientists: I. M. Frank, GN Flerov, VPDzhelepov, M. Meshcheryakov, AA Logunov et al congratulate Academician NN Bogolyubov its 70 th anniversary. NN Bogolyubov home with his wife and sons. 2 pm - Opening of the international seminar on mathematics and theoretical physics at the Joint Institute for Nuclear Research: AA Logunov read greetings from the 70 th anniversary of Academician NN Bogoliubov. Stands Ambartsumyan. NN Bogolyubov, AA Logunov, VB Dzhelenov talks with foreign scientists. The exhibition of printed works of NN Bogolyubov.