• Thumbnail for Nikolai Lobachevsky
    Study of its Development. 1912. Dover reprint 1955. Also in: Seth Braver Lobachevski illuminated, MAA 2011. Pangeometry. Excerpts translated by Henry P. Manning:...
    21 KB (2,314 words) - 12:51, 31 August 2024
  • Thumbnail for Friedrich Engel (mathematician)
    collected works of Hermann Grassmann. Engel translated the works of Nikolai Lobachevski from Russian into German, thus making these works more accessible...
    5 KB (392 words) - 02:25, 13 May 2024
  • Thumbnail for Hyperbolic geometry
    chosen directed line (the x-axis) and after that many choices exist. The Lobachevski coordinates x and y are found by dropping a perpendicular onto the x-axis...
    56 KB (7,019 words) - 21:44, 8 August 2024
  • Thumbnail for Kazan Federal University
    Chebotaryov, Aleksandr Butlerov, Naum Meiman, Kimal Akishev, Nikolay Lobachevski, Ivan Simonov, Vladimir Markovnikov, Konstantin Mereschkowski, Nikolay...
    45 KB (4,574 words) - 07:41, 7 July 2024
  • Thumbnail for Hjelmslev transformation
    theorem "For every given angle a there is a line p such that Π(p) = a" Lobachevski, Nicholas (1914). Geometrical Researches on The Theory of Parallels (PDF)...
    7 KB (912 words) - 12:36, 4 November 2023
  • 482 Addison, Thomas 483 Struve, Friedrich Georg Wilhelm Von 484 Lobachevski, Nikolai Ivanovich 485 Mitscherlich, Eilhardt 486 Babinet, Jacques 487 Whewell...
    99 KB (741 words) - 15:21, 28 November 2023