# Sergey . Gefter

Associate professor of the department of pure mathematics, head of the department of pure mathematics, phd in mathematics

Link on external publications: google.scholar.

## List of selected publications

**Sergey Gefter, Aleksey Piven **
*Entire solutions of one linear implicit differential-difference equation in Banach spaces* //
Ukrains’ kyi Matematychnyi Zhurnal,
2018, (70), #8, 1044-1057,

**Sergey Gefter, Aleksey Piven **
*Implicit linear difference equation in Frechet spaces* //
Dopov. Nac. akad. nauk Ukr. ,
2017, 6:3-8,

Keywords: Frechet space, implicit difference equation

**S. L. Gefter, A. L. 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,
2020. Vol. 6. P. 197-207,

**S.L. Gefter, V. V. Martseniuk & A. L. Piven’**
*INTEGER SOLUTIONS OF A SECOND ORDER IMPLICIT LINEAR DIFFERENCE EQUATION* //
Bukovinian Mathematical Journal. ,
6, 3-4 (Mar. 2019).,

Keywords: LINEAR DIFFERENCE EQUATION