Most significant publications
- Beata Deręgowska, Barbara Lewandowska, A simple proof of the Grünbaum conjecture, Journal of Functional Analysis 285(2) (2023), id. 109950
- Beata Deręgowska, Matthew Fickus, Simon Foucart, Barbara Lewandowska, On the value of the fifth maximal projection constant, Journal of Functional Analysis 283(10) (2022), id. 109634
- Beata Deręgowska, Barbara Lewandowska, Minimal projections onto hyperplanes in vector-valued sequence spaces, Journal of Approximation Theory 194 (2015), 1-13
- Beata Deręgowska, Barbara Lewandowska, On the minimal property of de la Vallee Poussin's operator, Bulletin of the Australian Mathematical Society 91(1) (2015), 129-133
- Beata Deręgowska, Barbara Lewandowska, On the Unique Minimality of the Fourier Projection in L_p Spaces, Numerical Functional Analysis and Optimization 34 (1) (2013), 1-15
Recent publications
- Beata Deręgowska, Simon Foucart, Barbara Lewandowska, When is a subspace of l_\infty^N isometrically isomorphic to l_\infty^n ?, Linear Algebra and Its Applications 733 (2026), 171-177
- Beata Deręgowska, Barbara Lewandowska, Grzegorz Lewicki, Minimal projections onto subspaces generated by sign-matrices, Journal of Approximation Theory 304 (2024), id. 106084
- Beata Deręgowska, Barbara Lewandowska, A simple proof of the Grünbaum conjecture, Journal of Functional Analysis 285(2) (2023), id. 109950
- Beata Deręgowska, Matthew Fickus, Simon Foucart, Barbara Lewandowska, On the value of the fifth maximal projection constant, Journal of Functional Analysis 283(10) (2022), id. 109634
- Beata Deręgowska, Simon Foucart, Barbara Lewandowska, Leslaw Skrzypek, On the norms and minimal properties of de la Vallée Poussin’s type operators, Monatshefte für Mathematik 185(4) (2018), 601-619
Interests
Theory of minimal projections in Banach spaces.
Barbara Lewandowska
academic degree/title Doctor of Philosophy (PhD) positionresearch and faculty staff member group, assistant professor
unit
- Department of Approximation Theory
- Institute of Mathematics
barbara.lewandowska@uj.edu.pl