$BKW$-Operators for Chebyshev Systems

ISHII, Takashi; IZUCHI, Keiji

Tokyo J. of Math., Tome 22 (1999) no. 2, p. 375-389 / Harvested from Project Euclid

Résumé

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 $\{1,t,t^2,t^3,t^4\}$.

Publié le : 1999-12-15
Classification:

@article{1270041444,
     author = {ISHII, Takashi and IZUCHI, Keiji},
     title = {$BKW$-Operators for Chebyshev Systems},
     journal = {Tokyo J. of Math.},
     volume = {22},
     number = {2},
     year = {1999},
     pages = { 375-389},
     language = {en},
     url = {http://dml.mathdoc.fr/item/1270041444}
}

ISHII, Takashi; IZUCHI, Keiji. $BKW$-Operators for Chebyshev Systems. Tokyo J. of Math., Tome 22 (1999) no. 2, pp.  375-389. http://gdmltest.u-ga.fr/item/1270041444/