Elementarnoe dokazatel'stvo neprotivorechivosti planimetrii Lobachevskogo.
Contributors: Lobachevskiĭ, N. I. 1792-1856.
Publisher: Gos. izd-vo tekhniko-teoret. lit-ry
Published: 1956
Place of publication: Moskva
Language: rus
Number of pages: 139
Subjects: Geometry, Non-Euclidean
Notes: "K stoletii͡u︡ so dni͡a︡ smerti Lobachevskogo."