Christian Bargetz
Tel.: +43 512 507 53873
Fax: +43 512 507 53899
E-Mail: christian.bargetz [at] uibk.ac.at
Technikerstraße 13, 7.OG, Zi.-Nr.: 727
A-6020 Innsbruck
Aktuelle Lehrveranstaltungen • Forschungsinteressen • Publikationen und Preprints • Konferenzen
Aktuelle Lehrveranstaltungen
Sprechstunde
Nach Terminvereinbarung (per E-Mail).
Lehrveranstaltungen im Sommersemester 2024
- VO/3 Partielle Differentialgleichungen
Montag, 09:15 - 10:00, Hörsaal F
Dienstag, 10.15 - 11:45, Hörsaal E - PS/2 Partielle Differentialgleichungen,
Montag, 10.15 - 11.45, Hörsaal F - VU/4 Grundlagen und Kernkompetenzen 1: Funktionalanalysis (gemeinsam mit Tommaso Russo),
Montag, 13:45 - 15:15, Hörsaal F
Mittwoch, 12:00 - 13:30, Hörsaal C
Themenvorschläge für Bachelorarbeiten
- Extension operators for smooth and Lipschitz functions
Informationen zum Ablauf des Bachelorseminars
Forschungsinteressen
- Nichtlineare Funktionalanalysis: Iterative (Projektions-)Methoden in Hilbert und Banachräumen, Generische Eigenschaften nichtexpansiver Abbildungen
- Theorie lokalkonvexer Räume: Fréchet-Räume, Folgenraumdarstellungen, topologische Tensorprodukte
- Verallgemeinerte Funktionen: vektorwertige Distributionen
Publikationen
Preprints zu meinen neueren Publikationen finden Sie auf arXiv.
Preprints
- C. Bargetz, M. Dymond und K. Pirk: On extremal nonexpansive mappings. Preprint (arXiv:2409.04292)
- C. Bargetz, J. Kąkol und D. Sobota: Continuous operators from spaces of Lipschitz functions. Preprint (arXiv:2405.09930)
Zeitschriftenartikel
- C. Bargetz, F. Luggin und T. Russo: Tilings of the Hyperbolic Space and Lipschitz Functions. Canadian Journal of Mathematics. Published online 2024:1-21. DOI: 10.4153/S0008414X24000804, arXiv:2402.04201
- C. Bargetz, A. Bartoš, W. Kubiś, und F. Luggin: Homogeneous isosceles-free spaces. Rev. Real Acad. Cienc. Exactas Fis. Nat. Ser. A-Mat. 118, 118 (2024). 10.1007/s13398-024-01587-y, arXiv:2305.03163
- C. Bargetz und F. Luggin: Observations on the metric projection in finite dimensional Banach spaces. Appl. Set-Valued Anal. Optim. 6 (2024), 41-52, DOI: 10.23952/asvao.6.2024.1.04, arXiv:2305.19908
- C. Bargetz, J. Kąkol, and D. Sobota, On complemented copies of the space \(c_0\) in spaces \(C_p(X,E)\), Math. Nachr. 297(2): 644-656. 2024. DOI: 10.1002/mana.202300026, arxiv:2107.03211
- C. Bargetz, S. Reich und D. Thimm, Generic properties of nonexpansive mappings on unbounded domains. J. Math. Anal. Appl. 526(1): Article 127179, 2023. DOI: 10.1016/j.jmaa.2023.127179, arXiv:2204.10279
- C. Bargetz, E. A. Nigsch und N. Ortner, Projective descriptions of spaces of functions and distributions. Math. Nachr. 296(3): 915-937, 2023 DOI: 10.1002/mana.202100526, arxiv:2109.14448
- C. Bargetz, E. Medjic, and K. Pirk: On generic convergence of successive approximations of mappings with convex and compact point images. Monatsh. Math. 202: 659–683, 2023. DOI: 10.1007/s00605-022-01813-y, arXiv:2211.02298
- C. Bargetz, A. Debrouwere, E. A. Nigsch: Sequence space representations for spaces of smooth functions and distributions via Wilson bases. Proc. Amer. Math. Soc. 150: 3841-3852, 2022, DOI: 10.1090/proc/15895, arxiv:2107.00245
- C. Bargetz, M. Dymond, E. Medjic and S. Reich: On the existence of fixed points for typical nonexpansive mappings on spaces with positive curvature. Topol. Methods Nonlinear Anal. 57(2): 621–634, 2021, DOI: 10.12775/TMNA.2020.040, arXiv:2004.02567
- C. Bargetz, E. A. Nigsch und N. Ortner: A simpler description of the \(\kappa\)-topologies on the spaces \(\mathscr{D}_{L^p}\), \(L^p\), \(\mathscr{M}^1\). Mathematische Nachrichten. 293(9): 1691–1706, 2020, DOI: 10.1002/mana.201900109, arXiv:1711.06577
- C. Bargetz, J. Klemenc, S. Reich und N. Skorokhod: On angles, projections and iterations. Linear Algebra Appl. 603 (2020): 41–56, DOI: 10.1016/j.laa.2020.05.023, arXiv:2004.07540
- C. Bargetz und E. Medjic: On the rate of convergence of iterated Bregman projections and of the alternating algorithm. J. Math. Anal. Appl. 481(1): Article 123482, 2020, DOI: 10.1016/j.jmaa.2019.123482, arXiv:1905.00605
- C. Bargetz und S. Reich: Generic Convergence of Sequences of Successive Approximations in Banach Spaces. Pure and Applied Functional Analysis 4(3): 477–493, 2019, arXiv:1903.10924, Link
- C. Bargetz, V. I. Kolobov, S. Reich, R. Zalas: Linear Convergence Rates for Extrapolated Fixed Point Algorithms. Optimization 68(1): 163–195, 2019, DOI: 10.1080/02331934.2018.1512109, arXiv:1805.03932
- C. Bargetz und N. Ortner: Kernel Identities and Vectorial Regularizations. Monatsh. Math. 186(2): 201–214, 2018, DOI: 10.1007/s00605-017-1076-4, arXiv:1509.07630
- C. Bargetz, S. Reich and R. Zalas: Convergence Properties of Dynamic String Averaging Projection Methods in the Presence of Perturbations. Numerical Algorithms 77(1): 185–209, 2018, DOI: 10.1007/s11075-017-0310-4, arXiv:1703.07803
- C. Bargetz und S.-A. Wegner: Pivot duality of universal interpolation and extrapolation spaces. Journal of Mathematical Analysis and Applications, 460(1): 321–331, 2018, DOI: 10.1016/j.jmaa.2017.11.042, arXiv:1604.00763
- C. Bargetz, M. Dymond und S. Reich: Porosity Results for Sets of Strict Contractions on Geodesic Metric Spaces. Topol. Methods Nonlinear Anal. 50(1):89–124, 2017, DOI: 10.12775/TMNA.2017.013, arXiv:1602.05230
- C. Bargetz, E. A. Nigsch, and N. Ortner: Convolvability and regularization of distributions. Annali di Matematica 196(6): 2239–2251, 2017, DOI: 10.1007/s10231-017-0662-3, arXiv:1505.04599
- C. Bargetz, J. Kąkol und W. Kubiś: A separable Fréchet space of almost universal disposition. J. Funct. Anal. 272(5): 1876–1891, 2017, DOI: 10.1016/j.jfa.2016.09.019, arXiv:1603.06361
- C. Bargetz und M. Dymond: σ-Porosity of the set of strict contractions in a space of non-expansive mappings. Israel J. Math. 214(1): 235–244, 2016, DOI: 10.1007/s11856-016-1372-z, arXiv:1505.07656
- C. Bargetz: Completing the Valdivia–Vogt tables of sequence-space representations of spaces of smooth functions and distributions. Monatsh. Math. 177(1): 1–14, 2015. DOI: 10.1007/s00605-014-0650-2
- C. Bargetz: Explicit representations of spaces of smooth functions and distributions. J. Math. Anal. Appl. 424: 149–1505. 2015 DOI: 10.1016/j.jmaa.2014.12.009
- C. Bargetz und N. Ortner: Solution to the Cauchy problem for quasi-hyperbolic systems by vector-valued convolution. Appl. Anal. 94(11): 2355–2369, 2015. DOI: 10.1080/00036811.2014.985213
- C. Bargetz und N. Ortner: Characterization of L. Schwartz' convolutor and multiplier spaces \(\mathcal{O}_{C}'\) and \(\mathcal{O}_M\) by the short-time Fourier transform. Revista de la Real Academia de Ciencias Exactas, Fisicas y Naturales. Serie A. Matematicas. 108 (2): 833–847, 2014. DOI: 10.1007/s13398-013-0144-4
- C. Bargetz: Commutativity of the Valdivia–Vogt table of representations of function spaces. Mathematische Nachrichten 287(1): 10–22, 2014. DOI: 10.1002/mana.201200258
- C. Bargetz und N. Ortner: Convolution of vector-valued distributions: A survey and comparison. Dissertationes Mathematicae 495: 51 pp.,2013. DOI: 10.4064/dm495-0-1
- C. Bargetz: A sequence space representation of L. Schwartz' space \(\mathcal{O}_C\). Archiv der Mathematik 98(4): 317-326, 2012. DOI: 10.1007/s00013-012-0373-3
- C. Bargetz: Convolution of Distribution-Valued Functions. Applications. Revista Colombiana de Matemáticas 45(1): 51-80, 2011. Link
Abschlussarbeiten
- C. Bargetz: Topological Tensor Products and the Convolution of Vector-Valued Distributions. Dissertation. Universität Innsbruck. 2012. Betreuer: ao.Univ.-Prof. Norbert Ortner
- C. Bargetz: Impulsive Solutions of Differential Behaviors. Diplomarbeit. Universität Innsbruck, 2008. Betreuer: o.Univ.-Prof. Ulrich Oberst
Projekte
Abgeschlossene Projekte
- Generische Eigenschaften nichtexpansiver Abbildungen (FWF P 32523, Projektseite)
- Banachräume stetiger und Lipschitz-Funktionen (FWF-GA ČR joint project, I 4570, Projektwebseite)
- Iterative Projection Methods in Banach Spaces, Tiroler Wissenschaftsförderung (Projektwebseite)
Konferenzen
Geplante Konferenzteilnahmen
- Analysis Seminar Innsbruck 2024, 24.-27. September 2024
Besuchte Konferenzen
2024 | Banach spaces for analysts. A conference in honor of Professor Przemysław Wojtaszczyk. Będlewo, 14.-19. Juli 2024 |
2023 | Conference on Generic Structures, Bedlewo, 23.-27. Oktober 2023 |
Bremen-Hamburg2-Kiel Seminar, Hamburg, 14. Juli 2023 |
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50th Winter School in Abstract Analysis, Sněžné, 7.-14. Jänner 2023 |
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2022 | International Conference on Generalized Functions, GF2022, 19.-23. September 2022 |
DMV Annual Meeting 2022, FU Berlin, 12.-16. September 2022 | |
36th Summer Topology Conference, 18.-22. Juli 2022, Wien | |
2021 | DMV-ÖMG Annual Conference 2021, University of Passau, 27. September–1. Oktober 2021 |
13th International ISAAC Congress, Ghent University@Zoom, 2.–6. August 2021 | |
2020 |
DMV Jahrestagung 2020, 14.–17. September 2020 |
48th Winter School in Abstract Analysis. Section Analysis. Svratka, 11.–18. Januar 2020 | |
2019 | Analysis Seminar Innsbruck, 15.–17. November 2019 |
Workshop WDI2, Passau, 11. Oktober 2019 | |
ÖMG Conference 2019, Dornbirn, Austria, 16.–20. September 2019 | |
12th ISAAC Congress, University of Aveiro, Portugal, 29. July–2.August 2019 | |
Selected topics in stochastic geometry, Spring School, TU Darmstadt, 25. Februar–1. März 2019 |
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47th Winter School in Abstract Analysis. Section Analysis. Svratka, 12.–19. Jänner 2019 | |
2018 | CSASC 2018–Joint Meeting of the Czech, Slovenian, Austrian, Slovak and Catalan Mathematical Societies Bratislava, Slovakia, 11.–14. September, 2018 |
International Conference on Generalized Functions GF2018, Novi Sad, Serbia, 27.–31. August, 2018 (link) |
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Workshop on Nonlinear Analysis and Optimization, The Technion, Haifa, 20. August 2018 (link) | |
Paweł Domański Memorial Conference, Będlewo, Poland, 1.–7. Juli 2018 | |
Analysis Seminar, Traunkirchen, Austria, 8.–10. Juni, 2018 (Link) |
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Workshop: Wien – Innsbruck – Novi Sad, Innsbruck, 11.–14. Februar 2018 | |
46th Winter School in Abstract Analysis. Section Analysis. Svratka, 13.–20. Jänner 2018 | |
2017 | Conference on Non Linear Functional Analysis, Valencia, 17–20 October 2017 (Link) |
19th ÖMG Congress and Annual DMV Meeting, Paris-Lodron University of Salzburg, 11–15 September 2017 (Link) | |
7th German-Polish Conference on Optimization, 27 August 2017 - 1 September 2017, Będlewo (Link) | |
Septièmes journées Besançon-Neuchâtel d’analyse fonctionnelle. 20-23 juin 2017, Besançon (Link) | |
Workshop on Nonlinear Analysis and Optimization, The Technion, Haifa, 7. Februar 2017 (Link) |
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45th Winter School in Abstract Analysis. Section Analysis. Svratka, 14.–21. Jänner 2017 | |
2016 | Analysis Seminar Innsbruck 2016, 4.–6. November 2016 (Link) |
44th Winter School in Abstract Analysis. Section Analysis. Svratka, 16.–23. Jänner 2016 |
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2015 | Relations Between Banach Space Theory and Geometric Measure Theory, Warwick, 8. –12. Juni 2015 (Link) |
Workshop on Functional Analysis Valencia 2015 on the occasion of the 60th birthday of José Bonet, Valencia, 15. –19. Juni 2015 (Link) |
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49. Jahrestagung der Gesellschaft für Didaktik der Mathematik, Basel, 9.–13. Feber 2015 |
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43rd Winter School in Abstract Analysis. Section Analysis. Svratka, 10.–17. Jänner 2015 | |
2014 |
Analysis Seminar Innsbruck 2014, 24. – 26. Oktober 2014 (Link) |
Joint Meeting of the German Mathematical Society (DMV) and the Polish Mathematical Society (PTM), Poznań, 17.–20. September 2014 (Link) |
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Young Functional Analysts' Meeting 2014, Debrecen, 11.–13. April 2014 | |
42nd Winter School in Abstract Analysis. Section Analysis. Svratka, 11.–18. Jänner 2014 | |
2013 | Analysis Seminar Innsbruck 2013, 29. November – 1. December 2013 (Link) |
18th ÖMG Congress and Annual DMV Meeting University of Innsbruck, 23.–27. September 2013 (Link) | |
Workshop on Functional Analysis Valencia 2013 on the occasion of the 60th birthday of Andreas Defant (Link) | |
2012 | Functional Analysis: Applications to Complex Analysis and Partial Differential Equations 2012 organized in honor of Dietmar Vogt on the occasion of his 70th birthday (Link) |
37th Annual International Conference on Improving University Teaching Innsbruck, Austria 2012 |
Skripten (in der Studia erhältlich)
- C. Bargetz und M. Dymond: Lipschitz Mappings and geometric properties of Banach Spaces. Sommersemester 2017
- C. Bargetz: Lineare Algebra und Analytische Geometrie 2. Sommersemester 2017
- C. Bargetz: Distributionentheorie und Anwendungen. Sommersemester 2012