![LOBACHEVSKY, Nikolai (1792-1856). Sposob uviersit'sia v izchezanii bezkonechnykh strok i priblizhat'sia k znacheniiu funktsii ot ves'ma bol'shikh chisel. [A method for ascertaining the convergence of infinite series and for obtaining approximate values of functions of a large number of variables]. Kazan: at the University, 1835.](https://www.christies.com/img/LotImages/2019/CKS/2019_CKS_18466_0048_001(lobachevsky_nikolai_sposob_uviersitsia_v_izchezanii_bezkonechnykh_stro114659).jpg?w=1)
![LOBACHEVSKY, Nikolai (1792-1856). Sposob uviersit'sia v izchezanii bezkonechnykh strok i priblizhat'sia k znacheniiu funktsii ot ves'ma bol'shikh chisel. [A method for ascertaining the convergence of infinite series and for obtaining approximate values of functions of a large number of variables]. Kazan: at the University, 1835.](https://www.christies.com/img/LotImages/2019/CKS/2019_CKS_18466_0048_000(lobachevsky_nikolai_sposob_uviersitsia_v_izchezanii_bezkonechnykh_stro114641).jpg?w=1)
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LOBACHEVSKY, Nikolai (1792-1856). Sposob uviersit'sia v izchezanii bezkonechnykh strok i priblizhat'sia k znacheniiu funktsii ot ves'ma bol'shikh chisel. [A method for ascertaining the convergence of infinite series and for obtaining approximate values of functions of a large number of variables]. Kazan: at the University, 1835.
First separate printing, exceptionally rare, from the Scientific Memoirs of Kazan University, 1835, No. 2.
Octavo (210 x 131mm). (Title and last leaf of first quire skillfully repaired at gutter, small stain to outer margin of the title). Contemporary Russian green half leather, flat spine with blind-stamped lettering, green pebble cloth sides (spine chipped at extremities and rubbed with sporadic losses, joints cracked but holding, edges worn), preserving evidence of original wrappers in the inner margins of the title and last leaf. Provenance: some pencil underlining to the title.
First separate printing, exceptionally rare, from the Scientific Memoirs of Kazan University, 1835, No. 2.
Octavo (210 x 131mm). (Title and last leaf of first quire skillfully repaired at gutter, small stain to outer margin of the title). Contemporary Russian green half leather, flat spine with blind-stamped lettering, green pebble cloth sides (spine chipped at extremities and rubbed with sporadic losses, joints cracked but holding, edges worn), preserving evidence of original wrappers in the inner margins of the title and last leaf. Provenance: some pencil underlining to the title.
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