Feshchenko Ivan Serhiiovych
Education
2010 - Bachelor of mathematics, summa cum laude, Faculty of Mechanics and Mathematics, Taras Shevchenko National University of Kyiv.
2012 - Master of mathematics, summa cum laude, Faculty of Mechanics and Mathematics, Taras Shevchenko National University of Kyiv.
2019 - Defended thesis “Systems of subspaces of Hilbert and Banach spaces, their properties and applications” and received a degree Candidate of Physical and Mathematical Sciences (comparable to the Academic Degree of Doctor of Philosophy), Institute of Mathematics of NAS of Ukraine.
2012 - Master of mathematics, summa cum laude, Faculty of Mechanics and Mathematics, Taras Shevchenko National University of Kyiv.
2019 - Defended thesis “Systems of subspaces of Hilbert and Banach spaces, their properties and applications” and received a degree Candidate of Physical and Mathematical Sciences (comparable to the Academic Degree of Doctor of Philosophy), Institute of Mathematics of NAS of Ukraine.
Dissertations
2019 - Defended thesis “Systems of subspaces of Hilbert and Banach spaces, their properties and applications” and received a degree Candidate of Physical and Mathematical Sciences (comparable to the Academic Degree of Doctor of Philosophy), Institute of Mathematics of NAS of Ukraine.
Research interests
Systems of subspaces of Hilbert and Banach spaces, their properties and applications.
Experience
September 2012 - August 2019
Assistant at Taras Shevchenko National University of Kyiv, Faculty of Mechanics and Mathematics, Department of Mathematical Analysis.
September 2019 - present time
Junior researcher, Institute of Mathematics of NAS of Ukraine, Department of Functional Analysis.
Assistant at Taras Shevchenko National University of Kyiv, Faculty of Mechanics and Mathematics, Department of Mathematical Analysis.
September 2019 - present time
Junior researcher, Institute of Mathematics of NAS of Ukraine, Department of Functional Analysis.
Talks on conferences
On the closedness of the sum of subspaces of the space B(H,Y) consisting of operators whose kernels contain given subspaces of H, International Conference of Young Mathematicians, 1-3 June 2023, online.