Pafnuty Lvovich Chebyshev (Пафну́тий Льво́вич Чебышёв) (May 16 1821 - December 9 1894) was a Russian mathematician. His name is also transliterated as Chebyshov, Tchebycheff or Tschebyscheff (obsolete French and German transcriptions).
One of nine children, he was born in central Russian village Okatovo near Borovsk, to Agrafena Ivanova Pozniakova and Lev Pavlovich Chebyshev. His father fought as an officer against Napoleon's invading army.
He was originally home-schooled by his mother and his cousin Avdotia Kvintillianova Soukhareva. He learned French early in life, which later helped him communicate with other mathematicians. A stunted leg prevented him from playing with other children, leading him to concentrate on studying instead.
Chebyshev is known for his work in the field of probability and statistics. Chebyshev's inequality says that the probability that the outcome of a random variable is no less than a standard deviations away from its mean is no more than 1/a2:
- Bienaymé-Chebyshev inequality - (1853|1866)
- Chebyshev distance
- Chebyshev filter, in electronics and signal processing, a family of electronic filters
- Chebyshev polynomials
- Chebyshev's sum inequality
de:Pafnuti Lwowitsch Tschebyschow es:Pafnuty Chebyshev eo:Pafnuti ĈEBIŜEV fr:Pafnouti Tchebychev it:Pafnuti Cebicev he:פפנוטי צ'בישב hu:Pafnutyij Csebisov nl:Pafnoeti Lvovitsj Tsjebysjev no:Pafnutij Tsjebysjev pl:Pafnutij L. Czebyszew pt:Pafnuti Tchebychev ru:Чебышёв, Пафнутий Львович sl:Pafnuti Lvovič Čebišov