The obverse of the coin
in the ring of dots depicts the emblem of the Bank of Russia (the eagle with drooping wings), under the right paw mark of the Moscow mint
(stylized letters "ММД". From the outside of the ring up in a semicircle along the rim the inscription: "ОДИН РУБЛЬ 1992 г." below "БАНК РОССИИ"(the inscriptions are separated by ornaments, consisting of rhombuses).The reverse of the coin
vividly depicted half-length portrait of N. And. Lobachevsky with arms crossed on his chest. To the left along the rim up from the bottom an inscription: "Н.И.ЛОБАЧЕВСКИЙ" right along the edge to indicate the years of life: "1792-1856".
The obverse and reverse of the coin features the speaker on the circumference of the piping.
Artist: A. A. Kolodkin.
The Sculptors: A.V. Mikhailov, A. A. Beginners.
Date of issue: December 1, 1992
There are also coins in the performance of the proof-like (mirror field), with a circulation of 400 thousand pieces.
Lobachevsky, Nikolai Ivanovich (1792-1856) was a great Russian mathematician, known also as the author of works on physics, mechanics and astronomy. For a long time was the rector of Kazan University. The most outstanding work was the opening of the new currents in geometry, contrary to well-established for centuries the teachings of Euclid. The basis of his geometry is the principle that two parallel lines can intersect. Later the idea was further developed by Riemann, who created a third geometry that is based on spheres.