Nikolay Yakovlevich Sonin

Nikolay Sonin
Born	February 22, 1849(1849-02-22) Tula, Russia
Died	February 27, 1915(1915-02-27) (aged 66)
Nationality	Russian
Fields	Mathematics
Alma mater	Lomonosov University
Doctoral advisor	Nikolai Bugaev

Nikolay Yakovlevich Sonin (February 22, 1849 – February 27, 1915) was a Russian mathematician.

He was born in Tula and attended Lomonosov University, studying mathematics and physics there from 1865 to 1869. His advisor was Nikolai Bugaev. He obtained a Master's Degree with a thesis submitted in 1871, then he taught at the University of Warsaw where he obtained a doctorate in 1874. He was appointed to a chair in the University of Warsaw in 1876. In 1894, Sonin moved to St. Petersburg where he taught at the University for Women.

Sonin worked on special functions, in particular cylindrical functions. He also worked on the Euler–Maclaurin summation formula.

Other topics Sonin studied include Bernoulli polynomials and approximate computation of definite integrals, continuing Chebyshev's work on numerical integration. Together with Andrey Markov, Sonin prepared a two volume edition of Chebyshev's works in French and Russian. He died in St. Petersburg.

External links

• O'Connor, John J.; Robertson, Edmund F., "Nikolay Yakovlevich Sonin", MacTutor History of Mathematics archive, University of St Andrews, http://www-history.mcs.st-andrews.ac.uk/Biographies/Sonin.html .
• Nikolay Yakovlevich Sonin at the Mathematics Genealogy Project.

Persondata
Name	Sonin, Nikolay Yakovlevich
Alternative names
Short description	Russian mathematician
Date of birth	February 22, 1849
Place of birth	Tula, Russia
Date of death	February 27, 1915
Place of death