Raffael Hagger
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100
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Postdoctoral Research Assistant
Office
Room 213Building location
MathematicsPublications
- Chandler-Wilde, S. , Hagger, R. , Perfekt, K. , Virtanen, J. (2023) On the spectrum of the double-layer operator on locally-dilation-invariant Lipschitz domains. Numerische Mathematik , 153 pp. 653-699. ISSN: 0029-599X | doi: https://dx.doi.org/10.1007/s00211-023-01353-z
- Hagger, R. , Liu, C. , Taskinen, J. , Virtanen, J. (2022) Toeplitz operators on the unit ball with locally integrable symbols. Integral Equations and Operator Theory , 94 (2). ISSN: 1420-8989 | doi: https://dx.doi.org/10.1007/s00020-022-02695-3
- Ehrhardt, T. , Hagger, R. , Virtanen, J. (2021) Bounded and compact Toeplitz+Hankel matrices. Studia Mathematica , 2021 (260). pp. 103-120. ISSN: 0039-3223 | doi: https://dx.doi.org/10.4064/sm200806-6-10
- Hagger, R. and Virtanen, J. (2021) Compact Hankel operators with bounded symbols. Journal of Operator Theory , 86 (2). pp. 317-329. ISSN: 1841-7744 | doi: https://dx.doi.org/10.7900/jot.2020apr27.2276
- Hagger, R. (2019) A product expansion for Toeplitz operators on the Fock space. Proceedings of the American Mathematical Society , 147 (11). pp. 4823-4833. ISSN: 0002-9939 | doi: https://dx.doi.org/10.1090/proc/14661
- Bauer, W. , Hagger, R. , Vasilevski, N. (2019) Algebras of Toeplitz operators on the n-dimensional unit ball. Complex Analysis and Operator Theory , 13 (2). pp. 493-524. ISSN: 1661-8262 | doi: https://dx.doi.org/10.1007/s11785-018-0837-y
- Hagger, R. (2019) Limit operators, compactness and essential spectra on bounded symmetric domains. Journal of Mathematical Analysis and Applications , 470 (1). pp. 470-499. ISSN: 0022-247X | doi: https://dx.doi.org/10.1016/j.jmaa.2018.10.016
- Fulsche, R. and Hagger, R. (2019) Fredholmness of Toeplitz operators on the Fock space. Complex Analysis and Operator Theory , 13 (2). pp. 375-403. ISSN: 1661-8262 | doi: https://dx.doi.org/10.1007/s11785-018-0803-8
- Bauer, W. , Coburn, L. , Hagger, R. (2018) Toeplitz quantization on Fock space. Journal of Functional Analysis , 274 (12). pp. 3531-3551. ISSN: 0022-1236 | doi: https://dx.doi.org/10.1016/j.jfa.2018.01.001
- Hagger, R. (2017) The essential spectrum of Toeplitz operators on the unit ball. Integral Equations and Operator Theory , 89 (4). pp. 519-556. ISSN: 1420-8989 | doi: https://dx.doi.org/10.1007/s00020-017-2399-1
- Bauer, W. , Hagger, R. , Vasilevski, N. (2017) Uniform continuity and quantization on bounded symmetric domains. Journal of the London Mathematical Society , 96 (2). pp. 345-366. ISSN: 1469-7750 | doi: https://dx.doi.org/10.1112/jlms.12069
- Chandler-Wilde, S. and Hagger, R. (2017) On symmetries of the Feinberg-Zee random hopping matrix. In: Maz'ya, V. , Natroshvili, D. , Shargorodsky, E. , Wendland, W. , (eds.) Recent Trends in Operator Theory and Partial Differential Equations: the Roland Duduchava Anniversary Volume. Operator Theory: Advances and Applications , 258. Birkhauser , Basel. ISBN: 9783319470771
- Hagger, R. (2016) On the spectrum and numerical range of tridiagonal random operators. Journal of Spectral Theory , 6 (2). pp. 215-266. ISSN: 1664-039X | doi: https://dx.doi.org/10.4171/JST/124
- Hagger, R. , Lindner, M. , Seidel, M. (2015) Essential pseudospectra and essential norms of band-dominated operators. Journal of Mathematical Analysis and Applications , 437 (1). pp. 255-291. ISSN: 0022-247X | doi: https://dx.doi.org/10.1016/j.jmaa.2015.11.060
- Hagger, R. (2015) The eigenvalues of tridiagonal sign matrices are dense in the spectra of periodic tridiagonal sign operators. Journal of Functional Analysis , 269 (5). pp. 1563-1570. ISSN: 0022-1236 | doi: https://dx.doi.org/10.1016/j.jfa.2015.01.019
- Hagger, R. (2015) Symmetries of the Feinberg-Zee random hopping matrix. Random Matrices: Theory and Applications , 4 (4). ISSN: 2010-3271 | doi: https://dx.doi.org/10.1142/S2010326315500161