

Chebyshev, Pafnuty Lvovich[chebishof](182194) Mathematician, born in Okatovo, Russia. A graduate of Moscow University, he became an assistant at St Petersburg in 1847 and later professor (186082). In number theory he made important contributions to the theory of the distribution of prime numbers, and in probability theory he proved fundamental limit theorems. His theory of approximation to functions by polynomials has become important in modern computing. The mathematical school that he founded at St Petersburg influenced Russian mathematics for the rest of the century. 
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