Abstract
This paper is concerned with Korovkin type approximation theorems. We characterize $BKW$-operators on the Banach space of real valued continuous functions on the unit interval for the test functions $\{1,t,t^2,t^3\}$. It is also investigated when subtraction of composition operators are $BKW$-operators for $\{1,t,t^2,t^3,t^4\}$.
Citation
Takashi ISHII. Keiji IZUCHI. "$BKW$-Operators for Chebyshev Systems." Tokyo J. Math. 22 (2) 375 - 389, December 1999. https://doi.org/10.3836/tjm/1270041444
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