Russia Rouble1992 - N.I. Lobachevsky

the depiction of N.I. Lobachevsky with his arms folded on the chest, the inscriptions along the rim: to the left - "Н. И. ЛОБАЧЕВСКИЙ" (N. I. LOBACHEVSKY), to the right - the dates "1762 • 1856". in the center - the Emblem of the Bank of Russia (the two-headed eagle designed by I.Bilibin), under it to the right - the mint trademark. The inscriptions along the rim framed by a circle of dots and separated by an ornaments: at the top - "ОДИН РУБЛЬ 1992" (ONE RUBLE 1992), at the bottom - БАНК РОССИИ (BANK OF RUSSIA). Nikolai Ivanovich Lobachevsky (1792-1856), a Russian mathematician, is known as the creator of non-Euclidean geometry. From 1827 to 1846 he was rector of the Kazan University. Lobachevsky's discovery (made in 1826 and published in 1829-1830), ignored by his contemporaries, was a breakthrough in the understanding of the nature of space, which for more than 2000 years had been based on Euclid's assumptions, and had a tremendous impact on the development of mathematical thinking. Lobachevsky wrote works on algebra, mathematical analysis, the calculus of probabilities, mechanics, physics and astronomy. The artist: A.A. Kolodkin The sculptors: A.V. Grankin, A.A. Novichkov Moscow Mint (ММД) The edge: two incised inscriptions "ОДИН РУБЛЬ" (ONE RUBLE), separated by two asterisks.