Geodesic
Approximation by composition of Sz\"asz-Mirakyan and Durrmeyer-Chlodowsky operators
Eurasian mathematical journal, Tome 3 (2012) no. 1, pp. 63-71.

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We establish some approximation properties in weighted spaces and we give a Voronovskaya type asymptotic formula for the composition of the Szäsz-Mirakyan and Durrmeyer-Chlodowsky operators. 
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A. İzgi. Approximation by composition of Sz\"asz-Mirakyan and Durrmeyer-Chlodowsky operators. Eurasian mathematical journal, Tome 3 (2012) no. 1, pp. 63-71. http://geodesic.mathdoc.fr/item/EMJ_2012_3_1_a4/

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