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Baskakov operator : ウィキペディア英語版
Baskakov operator
In functional analysis, a branch of mathematics, the Baskakov operators are generalizations of Bernstein polynomials, Szász–Mirakyan operators, and Lupas operators. They are defined by
:()(x) = \sum_^\infty \phi_n^(x) f\left(\frac\right)}
where x\in. Alternatively, \phi_n has a Taylor series on [0,b).
#\phi_n(0) = 1
#\phi_n is completely monotone, i.e. (-1)^k\phi_n^\geq 0.
#There is an integer c such that \phi_n^ = -n\phi_^ whenever n>\max\
They are named after V. A. Baskakov, who studied their convergence to bounded, continuous functions.
==Basic results==
The Baskakov operators are linear and positive.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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