# Sergey . Gefter

Docent (associate professor) of department of fundamental mathematics, phd in mathematics

## List of selected publications

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**1. Sergey Gefter, Aleksey Piven **
*Initial problem for a nonhomogeneous linear differential-difference equation in a Banach space for a class of exponential type entire functions, European Journal of Mathematics (2019). https://link.springer.com/article/10.1007/s40879-019-00314-x https://doi.org/10.1007/s40879-019-00314-x * //

**1. Sergey Gefter, Aleksey Piven **
*Initial problem for a nonhomogeneous linear differential-difference equation in a Banach space for a class of exponential type entire functions * //
European Journal of Mathematics (2019),
https://doi.org/10.1007/s40879-019-00314-x ,

**Sergey Gefter, Aleksey Piven **
*Initial problem for a nonhomogeneous linear differential-difference equation in a Banach space for a class of exponential type entire functions* //
European Journal of Mathematics (2019), https://link.springer.com/article/10.1007/s40879-019-00314,
https://doi.org/10.1007/s40879-019-00314-x ,

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**Martseniuk V., Gefter S., Piven’ A. **
*Integer solutions of implicit linear difference equations* //
Voronoï’s Impact on Modern Science. Proc. Sixth Int. Conf. Anal. Number Theory Spat. Tessellations. — Kyiv : Natl. Pedagog. Dragomanov Univ. Publ., 2018.,
Vol. 1. — P. 87–95,

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**S. L. Hefter, O. L. Piven’ **
*Entire Solutions of One Linear Implicit Differential-Difference Equation in Banach Spaces* //
Ukrainian Mathematical Journal, https://link.springer.com/article/10.1007/s11253-018-1563-3,
2019.– V. 70, Iss. 8.– P. 1205–1220,

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