Approximations of the Korovkin type in Banach lattices

Korovkin-type approximation by operators in Riesz spaces via power series method

“…Later in [6], Atlihan and Taş proved a Korovkin-type Approximation theorem with respect to A-summation processes. A Banach lattice version of Korovkin's theorem has been established and is due to Wiśniewska and Wójtowicz (see [7]). Very recently, in [8] the first author, Dorai and Wójtowicz gave a Riesz space version of the Korovkin theorem.…”