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Szász–Mirakyan Type Operators Which Fix Exponentials

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Abstract

In this paper, we construct a new general class of operators which have the classical Szász Mirakyan ones as a basis, and fix the functions \(e^{ax}\) and \(e^{2ax}\) with \(a>0\). The convergence of the corresponding sequences is discussed in exponential weighted spaces, and a Voronovskaya type result is given. Also we define a new weighted modulus of smoothness and determine the approximation order of the constructed operators. Finally, we study the goodness of the estimates of our new operators via saturation results.

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References

  1. Acar, T., Aral, A., Gonska, H.: On Szász-Mirakyan operators preserving \(e^{2ax},\) \(a>0\). Mediterr. J. Math. 14(1), 1–14 (2017)

  2. Agratini, O., Tarabie, S.: On approximating operators preserving certain polynomials. Autom. Comput. Appl. Math. 17(2), 191–199 (2008)

    MathSciNet  Google Scholar 

  3. Aral, A., Inoan, D., Rasa, I.: On the generalized Szá sz–Mirakyan operators. Results Math. 65, 441–452 (2014)

    Article  MATH  MathSciNet  Google Scholar 

  4. Braica, P.I., Pişcoran, L.I., Indrea, A.: Grafical structure of some king type operators. Acta Universitatis Apulensis 34, 163–171 (2013)

    MATH  Google Scholar 

  5. Braica, P.I., Pop, O.T., Indrea, A.D.: About a King type operator. Appl. Math. Sci. 6(1), 145–148 (2012)

    MATH  MathSciNet  Google Scholar 

  6. Cardenas-Morales, D., Garrancho, P., Munoz-Delgado, F.J.: Shape preserving approximation by Bernstein-type operators which fix polynomials. Appl. Math. Comput. 182(2), 1615–1622 (2006)

    MATH  MathSciNet  Google Scholar 

  7. Cardenas-Morales, D., Garrancho, P., Raşa, I.: Approximation properties of Bernstein–Durrmeyer type operators. Appl. Math. Comput. 232, 1–8 (2014)

    MathSciNet  Google Scholar 

  8. Gadziev, A.D.: Theorems of the type of P. P. Korovkin’s theorems. Mat Zametki 20(5), 781–786 (1976)

    MATH  MathSciNet  Google Scholar 

  9. Garrancho, P., Cardenas-Morales, D.: A converse of asymptotic formulae in simultaneous approximation. Appl. Math. Comput. 217, 2676–2683 (2010)

    MATH  MathSciNet  Google Scholar 

  10. King, J.P.: Positive linear operators which preserve \(x^{2},\) Acta Math. Hungar 99(3), 203–208 (2003)

    MATH  MathSciNet  Google Scholar 

  11. Shisha, O., Mond, B.: The degree of convergence of sequences of linear positive operators. Proc. Natl. Acad. Sci. USA 60, 1196–1200 (1968)

    Article  MATH  MathSciNet  Google Scholar 

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Correspondence to Tuncer Acar.

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Acar, T., Aral, A., Cárdenas-Morales, D. et al. Szász–Mirakyan Type Operators Which Fix Exponentials. Results Math 72, 1393–1404 (2017). https://doi.org/10.1007/s00025-017-0665-9

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  • DOI: https://doi.org/10.1007/s00025-017-0665-9

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