Semi Post–Widder Operators and Difference Estimates

Abstract We consider the Post–Widder operators of semi-exponential type, which are a generalization exponential connected with $$x^2$$ x 2 . This modification has beauty to find difference other operators, while original do not have such property. estimate quantitative these Baskakov type and Szász–Kantorovich along some composition operators. Finally, we further form preserving linear functions direct results.