A note on the fixed points of positive linear operators
The main result of the paper is the following Theorem: There exists no positive linear analytic operator \(L : C[0,1] \to C[0,1]\) preserving the monomial functions \(x^{i}\) and \(x^{j},\) where \(0 < i < j\) are given integers.
scientific article; zbMATH DE number 6840977