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Encyclopedia > Tchebichef
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Pafnuty Lvovich Chebyshev

Pafnuty Lvovich Chebyshev (Пафнутий Львович Чебышёв) (May 4, 1821 - November 26, 1894) was a Russian mathematician. His name is also transliterated as Chebyshov, Tchebycheff or Tschebyscheff (obsolete German transcription).


He was a student of Nikolai Brashman. His own most illustrious student was Andrei Markov.


He 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:

Chebyshev's inequality is used to prove the weak law of large numbers and the Bertrand-Chebyshev theorem (1845|1850).


The Chebyshev polynomials are named in his honor.


In electronics and signal processing, the family of electronic filters known as "Chebyshev filters" are named after him.


Chebyshev also lends his name to the Chebyshev distance formula.


See also

External link

  • MacTutor biography (http://www-history.mcs.st-andrews.ac.uk/history/Mathematicians/Chebyshev.html)

  Results from FactBites:
 
[Abstract] A New Class of Rotational Invariants using Discrete Orthogonal Moments (138 words)
Rotational invariants, orthogonal moments, zernikemoment invariants, Tchebichef moments, patternrecognition.
This paper presents a new class of Tchebichef moments in polar coordinate form, using which rotational invariants can be easily constructed.
The structure of the invariants is very similar to that of Zernike and Pseudo-Zernike moments, and their computation does not involve discrete approximation of continuous integral terms.
  More results at FactBites »


 

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