- approximation of the function
- Макаров: аппроксимация функции
Универсальный англо-русский словарь. Академик.ру. 2011.
Универсальный англо-русский словарь. Академик.ру. 2011.
Approximation theory — In mathematics, approximation theory is concerned with how functions can best be approximated with simpler functions, and with quantitatively characterizing the errors introduced thereby. Note that what is meant by best and simpler will depend on … Wikipedia
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Chebyshev function — The Chebyshev function ψ(x), with x < 50 The function ψ( … Wikipedia