Savchuk Viktor
Education
2012 – Doctor of Sciences in Physics and Mathematics fellowship in the Institute of Mathematics of NASU, Kyiv, Ukraine.
1999 – Candidate of Physical and Mathematical Sciences fellowship in the Institute of Mathematics of NASU, Kyiv, Ukraine.
1995 – Master's degree in Mathematics, Lesya Ukrainka Volyn State University, Lutsk, Ukraine.
1999 – Candidate of Physical and Mathematical Sciences fellowship in the Institute of Mathematics of NASU, Kyiv, Ukraine.
1995 – Master's degree in Mathematics, Lesya Ukrainka Volyn State University, Lutsk, Ukraine.
Dissertations
2012 – “Extremal Problems of the Theory of Approximation of Holomorphic Functions”, thesis on degree of Doctor of Sciences in Physics and Mathematics (Dr. Habil)
1999 – “Convergence Rates of Taylor and Faber Series on Classes of Ψ-Integrals of Functions of a Complex Variable”, thesis on degree of Candidate of Physical and Mathematical Sciences (Ph.D.)
1999 – “Convergence Rates of Taylor and Faber Series on Classes of Ψ-Integrals of Functions of a Complex Variable”, thesis on degree of Candidate of Physical and Mathematical Sciences (Ph.D.)
Research interests
Approximation and expansions
Functions of complex variable
Harmonic analysis on Euclidean spaces
Several complex variables
Analytic spaces.
Functions of complex variable
Harmonic analysis on Euclidean spaces
Several complex variables
Analytic spaces.
Experience
2025 Research stay at the University of Colorado Colorado Springs (USA)
2020‒2023 Researcher in the project “From Modeling and Analysis to Approximation” with the support of the Volkswagen Foundation under the Trilateral Partnerships - Cooperation Projects (Germany).
2019‒2020 Researcher in the project “Direct and Inverse Approximation Theorems of Functions of Several Variables in the Space Sp” funded by Kyrgyz-Turkish Manas University, KTMU-BAP- 2018.FBE.05 (Kyrgyzstan).
2018‒2019 Researcher in the project “Faber Polynomials with Prescribed Zero and Faber Sets'' funded by Kyrgyz-Turkish Manas University, KTMU-BAP-2017.FBE.03 (Kyrgyzstan).
2017‒2019 Researcher in the project “Approximation Methods for Molecular Modelling and Diagnosis Tools” funded by Marie Skłodowska-Curie actions, H2020-MSCA-RISE-2014, Project number 645672 (Germany).
2014‒2016 Project leader (from Ukrainian side) for Ukrainian-Slovak joint research project for the period funded by NASU and SAS.
Since 2012 Leading research fellow, Department of Theory of Functions, Institute of Mathematics of NASU, Kyiv, Ukraine.
2007‒2012 Senior research fellow, Department of Theory of Functions, Institute of Mathematics of NASU, Kyiv, Ukraine.
2004‒2007 Doctoral student, Department of Theory of Functions, Institute of Mathematics of NASU, Kyiv, Ukraine.
2002‒2004 Research fellow, Department of Theory of Functions, Institute of Mathematics of NASU, Kyiv, Ukraine.
1998‒2002 Junior research fellow, Department of Theory of Functions, Institute of Mathematics of NASU, Kyiv, Ukraine.
2020‒2023 Researcher in the project “From Modeling and Analysis to Approximation” with the support of the Volkswagen Foundation under the Trilateral Partnerships - Cooperation Projects (Germany).
2019‒2020 Researcher in the project “Direct and Inverse Approximation Theorems of Functions of Several Variables in the Space Sp” funded by Kyrgyz-Turkish Manas University, KTMU-BAP- 2018.FBE.05 (Kyrgyzstan).
2018‒2019 Researcher in the project “Faber Polynomials with Prescribed Zero and Faber Sets'' funded by Kyrgyz-Turkish Manas University, KTMU-BAP-2017.FBE.03 (Kyrgyzstan).
2017‒2019 Researcher in the project “Approximation Methods for Molecular Modelling and Diagnosis Tools” funded by Marie Skłodowska-Curie actions, H2020-MSCA-RISE-2014, Project number 645672 (Germany).
2014‒2016 Project leader (from Ukrainian side) for Ukrainian-Slovak joint research project for the period funded by NASU and SAS.
Since 2012 Leading research fellow, Department of Theory of Functions, Institute of Mathematics of NASU, Kyiv, Ukraine.
2007‒2012 Senior research fellow, Department of Theory of Functions, Institute of Mathematics of NASU, Kyiv, Ukraine.
2004‒2007 Doctoral student, Department of Theory of Functions, Institute of Mathematics of NASU, Kyiv, Ukraine.
2002‒2004 Research fellow, Department of Theory of Functions, Institute of Mathematics of NASU, Kyiv, Ukraine.
1998‒2002 Junior research fellow, Department of Theory of Functions, Institute of Mathematics of NASU, Kyiv, Ukraine.
Talks on conferences
• International Conference Dedicated to the 75th Anniversary of the Birth of Volodymyr Maslyuchenko, Chernivtsi, September 25–27, 2025.
• Workshop From Modeling and Analysis to Approximation and Fast Algorithms funded by VolkswagenStiftung, Hasenwinkel, Germany, September 02-06, 2023.
• International Workshop on Current Trends in Analysis and Approximation Theory, Rome (online), Italy, July 18, 2023.
• International Conference “Complex Analysis and Related Topics” dedicated to the 90th anniversary of A.A.Goldberg (1930-2008), Lviv (online), June 28 – July 1, 2021.
• 9th International Online Conference “Mathematical Analysis, Differential Equation & Applications MADEA9”, Bishkek (Online), Kyrgyz Republic, June 21-25, 2021.
• International Online Workshop on Approximation Theory (IOWAT-2021), Ivano-Frankivsk (online), March 19-21, 2021.
• International Conference “Approximation Theory and Its Applications,” dedicated to the 100th anniversary of the birth of M.P. Korneichuk (1920–2003), Dnipro (online), October 16–19, 2020.
• Final AMMODIT Conference “Mathematics for Life Sciences”. Kyiv, March 18-22, 2019.
• Workshop From Modeling and Analysis to Approximation and Fast Algorithms funded by VolkswagenStiftung, Hasenwinkel, Germany, September 02-06, 2023.
• International Workshop on Current Trends in Analysis and Approximation Theory, Rome (online), Italy, July 18, 2023.
• International Conference “Complex Analysis and Related Topics” dedicated to the 90th anniversary of A.A.Goldberg (1930-2008), Lviv (online), June 28 – July 1, 2021.
• 9th International Online Conference “Mathematical Analysis, Differential Equation & Applications MADEA9”, Bishkek (Online), Kyrgyz Republic, June 21-25, 2021.
• International Online Workshop on Approximation Theory (IOWAT-2021), Ivano-Frankivsk (online), March 19-21, 2021.
• International Conference “Approximation Theory and Its Applications,” dedicated to the 100th anniversary of the birth of M.P. Korneichuk (1920–2003), Dnipro (online), October 16–19, 2020.
• Final AMMODIT Conference “Mathematics for Life Sciences”. Kyiv, March 18-22, 2019.
Miscellaneous
LIST OF Sc.D. AND Ph.D. STUDENTS/MENTEES:
· Andriy Shidlich, Sc.D. at the Institute of Mathematics of the NAS of Ukraine, defended his thesis in September 2017.
Thesis: “Extremal Problems of Approximation Theory in Functional Spaces”.
· Stanislav Chaichenko, Sc.D. at the Institute of Mathematics of the NAS of Ukraine, defended his thesis in June 2016.
Thesis: “Extremal Problems of the Theory of Approximation of Functions of Real and Complex Variables”.
· Iryna Meremelia, Ph.D. at the Institute of Mathematics of the NAS of Ukraine, defended her thesis in September 2016.
Thesis: “Linear Approximation Methods and Extremal Problems on Classes of Holomorphic Functions”.
· Olexiy Piddubny, Ph.D. at the Institute of Mathematics of the NAS of Ukraine, defended his thesis in February 2014.
Thesis: “Hardy-Littlewood Theorems and Approximate Properties of the Generalized Abel-Poisson Operator”.
EDITORIAL ACTIVITIES:
Since 2015 Editorial Board, Advances in Analysis.
Since 2013 Advisory Board, Proceedings of the Institute of Mathematics and Mechanics (PIMM), National Academy of Sciences of Azerbaijan.
Since 2013 Advisory Board, Caspian Journal of Applied Mathematics, Economics and Ecology.
Since 2012 Editor Board, Proceedings of the Institute of Mathematics, National Academy of Sciences of Ukraine.
JOURNAL REFEREE
I have served as referee for the following journals:
· Advances in Analysis
· Analysis Mathematica
· Bulletin of Korean Mathematical Society
· Complex Variables and Elliptic Equations
· Filomat
· Kragujevac Journal of Mathematics
· Lobachevskii Journal of Mathematics
· Matematychni Studii
· Mathematical Notes
· Proceedings of the Institute of Mathematics and Mechanics National Academy of Sciences of Azerbaijan
· Journal of Nonlinear Functional Analysis
· Journal of Inequalities and Applications
· Journal of Fourier Analysis and Applications
· The Journal of the Indian Mathematical Society
· The Journal of Geometric Analysis
· Ukrainian Mathematical Journal
· Andriy Shidlich, Sc.D. at the Institute of Mathematics of the NAS of Ukraine, defended his thesis in September 2017.
Thesis: “Extremal Problems of Approximation Theory in Functional Spaces”.
· Stanislav Chaichenko, Sc.D. at the Institute of Mathematics of the NAS of Ukraine, defended his thesis in June 2016.
Thesis: “Extremal Problems of the Theory of Approximation of Functions of Real and Complex Variables”.
· Iryna Meremelia, Ph.D. at the Institute of Mathematics of the NAS of Ukraine, defended her thesis in September 2016.
Thesis: “Linear Approximation Methods and Extremal Problems on Classes of Holomorphic Functions”.
· Olexiy Piddubny, Ph.D. at the Institute of Mathematics of the NAS of Ukraine, defended his thesis in February 2014.
Thesis: “Hardy-Littlewood Theorems and Approximate Properties of the Generalized Abel-Poisson Operator”.
EDITORIAL ACTIVITIES:
Since 2015 Editorial Board, Advances in Analysis.
Since 2013 Advisory Board, Proceedings of the Institute of Mathematics and Mechanics (PIMM), National Academy of Sciences of Azerbaijan.
Since 2013 Advisory Board, Caspian Journal of Applied Mathematics, Economics and Ecology.
Since 2012 Editor Board, Proceedings of the Institute of Mathematics, National Academy of Sciences of Ukraine.
JOURNAL REFEREE
I have served as referee for the following journals:
· Advances in Analysis
· Analysis Mathematica
· Bulletin of Korean Mathematical Society
· Complex Variables and Elliptic Equations
· Filomat
· Kragujevac Journal of Mathematics
· Lobachevskii Journal of Mathematics
· Matematychni Studii
· Mathematical Notes
· Proceedings of the Institute of Mathematics and Mechanics National Academy of Sciences of Azerbaijan
· Journal of Nonlinear Functional Analysis
· Journal of Inequalities and Applications
· Journal of Fourier Analysis and Applications
· The Journal of the Indian Mathematical Society
· The Journal of Geometric Analysis
· Ukrainian Mathematical Journal