Russian mathematician, the father of Andrei Bely (1837-1903) and Russian mathematician and a Rector of the Imperial University of Moscow (1853-1924). Letter signed by both mathematicians. Moscow. 4to. 1 p. Folded. Some stains and paper loss to right border. Printed letterhead. $ 2,663 / 2.500 € (89637)
„The Moscow Mathematical Society has the honor to express its deep gratitude to the Kharkov Mathematical Society for the greeting brought to the Moscow Mathematical Society on the day of its twenty-fifth anniversary. President N. Bugaev | Vice President P. Nekrasov“