7th Summer Workshop on Operator Theory
21 - 24 July, 2025
Programme
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July 21, Monday |
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| 08:30–09:30 | Registration | |
| 09:30–09:45 | Opening of the conference | |
| Chair: Maria Cristina Câmara | ||
| 09:45–10:25 | Javad Mashreghi Asymptotic Equicontinuity |
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| 10:30–11:00 | Coffee break | |
| Chair: Maria Cristina Câmara | ||
| 11:00–11:40 | Sonja Mouton Ergodic domination in ordered Banach algebras with disjunctive products |
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| 11:50–12:30 | Catalin Badea Around von Neumann's inequality |
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| 12:30–15:00 | Lunch | |
| July 21, Monday al. Mickiewicza 21 Parallel Sessions |
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| Time | Session A (Hall A) Chair: Sonja Mouton |
Session B (Hall B) Chair: Jan Stochel |
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| 15:00–15:20 | Thomas Schulte-Herbrueggen Symmetries via Commutants: Where Operator Theory Meets Quantum Dynamics |
Marek Kosiek General solution of corona problem |
| 15:25–15:45 | Sourav Pal Spectral set, complete spectral set and dilation for Banach space operators |
Marcel Scherer Arveson's Hyperrigidity Conjecture: Partial Results and a New Counterexample |
| 15:50–16:10 | Nitin Tomar Dilation on an annulus, $K$-spectral set and interplay with certain varieties in the biball |
Paweł Pietrzycki Hyperrigidity and the property of rigidity at zero |
| 16:10–16:40 | Coffee break | |
| Chair: Zenon Jabłoński | Chair: Jacek Chmieliński | |
| 16:40–17:00 | Mark Elin Non-linear resolvents in the unit ball of a Banach space |
Sebastian Foks Absolute continuity of polynomially bounded tuples |
| 17:05–17:25 | Radomił Baran Contractive realization of rational functions on multiply connected domains |
Lav Kumar Singh Yet another F-space sample |
| 17:30–17:50 | David Shoikhet Old and new in complex dynamical systems |
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| July 22, Tuesday Conference Hall A al. Mickiewicza 21 Plenary Session |
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| Chair: Javad Mashreghi | ||
| 09:00–09:40 | Maria Cristina Câmara Maximal functions, factorisation of symbols and multipliers between Toeplitz kernels |
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| 09:50–10:30 | Zenon Jabłoński B‑Operators and Their Properties |
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| 10:30–11:00 | Coffee break | |
| Chair: Catalin Badea | ||
| 11:00–11:40 | Jongrak Lee Hyponormal Toeplitz operators on the Drury‑Arveson spaces |
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| 11:50–12:30 | Raul Curto Semi‑hyponormality of Commuting Pairs of Hilbert Space Operators |
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| 12:30–15:00 | Lunch | |
| July 22, Tuesday al. Mickiewicza 21 Parallel Sessions |
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| Time | Session A (Hall A) Chair: Jongrak Lee |
Session B (Hall B) Chair: Mieczysław Mastyło |
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| 15:00–15:20 | Jacek Chmieliński Approximate orthogonality in operator spaces |
Jan Stochel When is a CPD Operator Similar to a Subnormal Operator? |
| 15:25–15:45 | Pratibha Verma A Mathematical Study of Multi-Spatial and Multi-Fractional Damped Nonlinear Wave Models |
Chafiq Benhida On Bernstein functions |
| 15:50–16:10 | Patryk Pagacz The Taylor spectrum of pairs of isometries |
Piotr Pikul Weighted shifts on directed trees: the joint backward extensions |
| 16:10–16:40 | Coffee break | |
| Chair: Chafiq Benhida | Chair: Marcin Moszyński | |
| 16:40–17:00 | Carlos Carteiro Inclusion relations and multipliers between Toeplitz kernels and model spaces |
Petr Blaschke Uniqueness of H‑harmonic Moebius invariant inner products on the ball |
| 17:00–17:20 | Saee Joshi Completely hyperexpansive operators with finite rank defect operator and de Branges‑Rovnyak spaces |
Márcio Valente Fredholm criteria for singular integral operators with continuous coefficients on variable Lebesgue spaces |
| July 23, Wednesday Conference Hall A al. Mickiewicza 21 Plenary Session |
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| Chair: Hugo Woerdeman | ||
| 09:00–09:40 | Mieczysław Mastyło Projection constants for Banach spaces of polynomials |
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| 09:50–10:30 | Sandra Pott A dyadic approach to the space Hlog |
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| 10:30–11:00 | Coffee break | |
| Chair: Vladimír Müller | ||
| 11:00–11:40 | George Exner Some new approaches to Bernstein and completely monotone functions, and some consequences |
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| 11:50–12:30 | William Ross The Hardy Operator |
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| 12:30–15:00 | Lunch | |
| 15:00–22:00 | Excursion and Dinner | |
| July 24, Thursday al. Mickiewicza 21 Parallel Sessions |
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| Session A (Hall A) | Session B (Hall B) | |
|---|---|---|
| Chair: Sandra Pott | Chair: George Exner | |
| 09:00–09:20 | Jani Virtanen Asymptotics of block Toeplitz determinants with piecewise continuous symbols |
Paweł Mleczko Toeplitz operators between distinct Hardy spaces |
| 09:25–09:45 | Marcin Moszyński Block Jacobi matrices and self-adjoint finitely cyclic operators |
Bartosz Łanucha On de Branges-Rovnyak Spaces and Their Properties |
| 09:50–10:10 | Lech Zielinski Second-order approximation of large eigenvalues of the quantum Rabi model |
Raul Quiroga-Barranco A Hardy space on the unit cotangent bundle of the sphere and its operators |
| 10:15–10:35 | Grzegorz Świderski On positive Jacobi matrices with compact inverses |
Daniel Beltita One-parameter operator groups on Hardy spaces |
| 10:35–11:05 | Coffee break | |
| July 24, Thursday Conference Hall A al. Mickiewicza 21 Plenary Session |
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| Chair: William Ross | ||
| 11:05–11:45 | Vladimír Müller On the essential numerical range in Banach spaces |
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| 11:55–12:35 | Hugo Woerdeman Strictly Stable Hurwitz Polynomials and their Determinantal Representations |
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| 12:35– | Lunch | |