Convolute of two works on mathematical analysis:
Tikhomandritskiy, M. Kurs teorii konechnykh raznostey [i.e. The Course of Calculations of Finite Differences]. Kharkiv: D.N. Poluekhtov, 1890. , III, V, 274 pp.
Markov, A. Ischislenie konechnykh raznostey [i.e. Calculations of Finite Differences]. Complete in two parts. Part 1. Interpolirovanie [i.e. Interpolation]. St. Petersburg: Academy of Science press, 1889. , 121,  pp. Part 2. Uravneniya v konechnykh raznostiakh i summirovanie [i.e. Equations in Finite Differences and Summation]. St. Petersburg: Academy of Science press, 1891. 124 pp. 23x16,2 cm. Contemporary half-leather binding. Gilt lettering on the spine. Top of the spine is missing, otherwise a good copy.
First editions both.
Matvey Tikhomandritskiy (1844-1921) was the professor of pure mathematics in Kharkiv at the university. This is one of his main works. As it was printed locally it’s quite rare.
Worldcat locates two copies at Brown and Stanford Universities.
Andrei Markov (1856-1922) was one of the most prominent mathematicians of his time. He studied under Pafnutiy Chebyshev and followed his footsteps in science as well. His main eld was mathematical analysis and this book is regarded as the primary source of his views.
He is also known as the keen defender of Leo Tolstoy when the writer was removed from the church. As a result of this protest Markov was rejected by the church as well in 1912.
Worldcat locates no copies of this important book.