Semyon Yakubovich

     Associate  Professor  with Aggregation     

     e-mail: syakubov@fc.up.pt

Academic Degrees:

• Doctor of Science,  Belarusian State University, Minsk, 1996
• Candidate of Science (PhD),  Minsk,  USSR, 1987.

Professional Experience and Education:

 

 

04.2002-Present,Associate Professor with Aggregation of

                the University of Porto,Portugal

10.2001-04.2002 Associate Professor of the University of Porto

02.2000-10.2001 Visiting Associate Professor of the University of Porto

01.1999-02.2000 MS Access and Oracle Database Programmer at Systemhouse of

                the Eindhoven University of Technology, the Netherlands

01.1998-01.1999 Post-Doc at the Eindhoven University of Technology

01.1997-12.1997 Visiting Research Fellow under the Askey-Bateman Project

                Katholieke Universiteit Leuven, Belgium

03.1995-01.1997 Leading Researcher, Belarusian State University (BSU),

                Minsk, Belarus

03.1994-03.1995 Associate Professor (Research Fellow) University

                of Fukuoka, Japan

11.1992-03.1994 Leading Researcher, BSU

01.1990-11.1992 Senior Researcher, BSU

09.1988-01.1990 Scientific Researcher, BSU

12.1987-08.1988 Database Programmer at Minsk’s Research Institute

11.1984-10.1987 Ph.D. Mathematics, BSU

09.1978-08.1984 Ms. Sc. Mathematics, BSU

09.1976-06.1978 Student of Kolmogorov’s special school N 18 for

                young mathematicians at the Moscow University

 

Highlights:

• Four  published monographs
• More than 200 research papers

Long Term Visiting Professorship :

 Free University of Berlin (Germany): November 1991, December

 1992, December 1993;

 Gunma, Nara, Kyoto Universities (Japan), 1994;

 DAAD Scholarship: Jena University (Germany): July-August 1996.

 

Participation in the Projects :

Orthogonal Polynomials and Special Functions (the Socrates programme):

the project involving researches from several

european universities; since 2001;

 

List of Publications includes more than 200 items. Some of the papers published recently are the following:

 

 

R. Sousa, M. Guerra, S. Yakubovich,  Product formulas and convolutions for Laplace–Beltrami operators on product spaces: beyond the trivial case.

Math. Ann. 387 (2023), no. 1-2, 879–926.

 

 

 S. Yakubovich,  Upper bounds and asymptotic expansion for Macdonald's function and the summability of the Kontorovich-Lebedev integrals,  Integral Transforms and Special Functions, 34 (2023), N  10,  721-736.

 

 

 

H. Alzer,  S. Yakubovich,  Identities for combinatorial sums involving trigonometric functions,  Integral Transforms and Special Functions, 34 (2023), N  8,  563-569.

 

 

 

S.  Yakubovich,  Discrete orthogonal polynomials associated with

Macdonald functions.   The Ramanujan Journal, 2022,  59, 1147-1170.

 

 

S. Yakubovich,  On the theory of orthogonal polynomials for the weight xν

exp (−x − t/x). II,  Integral Transforms and Special Functions, 33 (2022), N  11,  846-866.

 

 

 

S. Yakubovich,  On the theory of orthogonal polynomials for the weight xν

exp (−x − t/x). I,  Integral Transforms and Special Functions, 33 (2022), N  9,  735-746.

 

S. Yakubovich,   Discrete index transforms with Bessel and modified Bessel functions. Analysis (Berlin) 42 (2022), no. 3, 149–157. 

 

 

S. Yakubovich,  A modification of the Prudnikov and Laguerre polynomials,  Integral Transforms and Special Functions, 33 (2022), N  8,  668-681.

 

 

 

 

S. Yakubovich,  Discrete Fourier-Jacobi transform,  Integral Transforms and Special Functions, 33 (2022), N  3,  191-198.

 

 

S. Yakubovich,  Discrete index transformations with squares of Bessel functions,  Integral Transforms and Special Functions, .33 (2022), N  2,  141-156.

 

 

S. Yakubovich,  Discrete index transformations with Bessel and Lommel functions. J. Anal. 29 (2021), no. 4, 1421–1441.

 

 

S. Yakubovich,  Discrete Lebedev-Skalskaya transforms,  Integral Transforms and Special Functions, .32 (2021), N  11,  883-892.

 

S.Yakubovich, Discrete index Whittaker transforms. Results Math. 76 (2021), no. 2, Paper No. 106, 10 pp.

 

 

 

 

S.  Yakubovich,  Discrete Lebedev’s index  transforms.   Rendiconti del Circolo Matematico di Palermo Series,  2021 70, N 2, 1647–1656.

 

 

S.  Yakubovich,  Discrete Kontorovich-Lebedev transforms.   The Ramanujan Journal, 2021,  55, 517-538.

 

S. Yakubovich, On the orthogonality and convolution orthogonality via the Kontorovich-Lebedev transform. J. Comput. Appl. Math. 384 (2021), 113178, 17 pp.

 

 

S. Yakubovich,  A method of composition orthogonality and new sequences of orthogonal polynomials and functions for non-classical weights.

 J. Math. Anal. Appl. 499 (2021), no. 2, 25pp.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

. Anal. 14 (2013), No. 1, pp. 28-41.