Seppo Hassi
Impact in
- Mathematical Physics top 0.5%
- Spectral Theory in Mathematical Physics
- Numerical methods in inverse problems
- Applied Mathematics top 0.5%
- Holomorphic and Operator Theory
- Differential Equations and Boundary Problems
- Mathematical Analysis and Transform Methods
Papers in
-
- Spectral Theory in Mathematical Physics 90
- Numerical methods in inverse problems 13
-
- Matrix Theory and Algorithms 52
- Advanced Mathematical Modeling in Engineering 19
- Co-authors
- Henk de Snoo (54 shared papers)H. S. V. de Snoo (22 shared papers)M. M. Malamud (8 shared papers)Vladimir Derkach (10 shared papers)Jussi Behrndt (13 shared papers)Henrik Winkler (13 shared papers)Zoltán Sebestyén (4 shared papers)Volodymyr Derkach (6 shared papers)
- Journals
- Mathematische Nachrichten (7 papers)Integral Equations and Operator Theory (6 papers)Proceedings of the American Mathematical Society (6 papers)Proceedings of the Royal Society of Edinburgh Section A Mathematics (4 papers)Journal of Functional Analysis (3 papers)
- Partner nations
- FinlandNetherlandsUkraine
In The Last Decade
Seppo Hassi
97 papers receiving 1.4k citations
Peers
Comparison fields: 5 of 47
- Mathematical Physics 1.2k
- Applied Mathematics 821
- Computational Theory and Mathematics 873
- Numerical Analysis 153
- Algebra and Number Theory 99
Countries citing papers authored by Seppo Hassi
This map shows the geographic impact of Seppo Hassi's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Seppo Hassi with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Seppo Hassi more than expected).
Fields of papers citing papers by Seppo Hassi
This network shows the impact of papers produced by Seppo Hassi. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Seppo Hassi. The network helps show where Seppo Hassi may publish in the future.
Co-authors
The 19 scholars most cited alongside Seppo Hassi, linked wherever they have co-authored with each other. Click a name or a connecting line to browse the papers they share.
All Works
Showing the 20 most-cited of 105 papers — load more, or switch the sort, to bring in the rest.
| # | Work | ||
|---|---|---|---|
| 1 | Oper. Theory Adv. Appl. | 2006 | 281 |
| 2 | 2006 | 94 | |
| 3 | 2020 | 90 | |
| 4 | 2009 | 59 | |
| 5 | 2000 | 58 | |
| 6 | 2009 | 45 | |
| 7 | 2004 | 38 | |
| 8 | 2001 | 37 | |
| 9 | One-dimensional graph perturbations of selfadjoint relations | 1997 | 36 |
| 10 | 1994 | 35 | |
| 11 | 2009 | 33 | |
| 12 | A general factorization approach to the extension theory of nonnegative operators and relations | 2007 | 32 |
| 13 | 2003 | 24 | |
| 14 | 2006 | 23 | |
| 15 | 2007 | 23 | |
| 16 | 2011 | 22 | |
| 17 | Some interpolation problems of Nevanlinna-Pick type | 1998 | 22 |
| 18 | 2008 | 20 | |
| 19 | 2006 | 18 | |
| 20 | 2005 | 17 |
About Seppo Hassi
Seppo Hassi is a scholar working on Mathematical Physics, Computational Theory and Mathematics, Applied Mathematics, Numerical Analysis and Statistical and Nonlinear Physics, having authored 105 papers that have together received 1.5k indexed citations. Recurring topics across this work include Spectral Theory in Mathematical Physics (90 papers), Matrix Theory and Algorithms (52 papers), Holomorphic and Operator Theory (44 papers), Advanced Mathematical Modeling in Engineering (19 papers), Differential Equations and Boundary Problems (15 papers), Numerical methods in inverse problems (13 papers), Differential Equations and Numerical Methods (12 papers) and Quantum chaos and dynamical systems (6 papers). The work is most often cited by research in Mathematical Physics (1.2k citations), Applied Mathematics (821 citations), Computational Theory and Mathematics (873 citations), Numerical Analysis (153 citations) and Algebra and Number Theory (99 citations). Seppo Hassi has collaborated with scholars based in Finland, Netherlands and Ukraine. Frequent co-authors include Henk de Snoo, H. S. V. de Snoo, M. M. Malamud, Vladimir Derkach, Jussi Behrndt, Henrik Winkler, Zoltán Sebestyén, Volodymyr Derkach, Franciszek Hugon Szafraniec and Adrian Sandovici. Their work appears in journals such as Mathematische Nachrichten, Integral Equations and Operator Theory, Proceedings of the American Mathematical Society, Proceedings of the Royal Society of Edinburgh Section A Mathematics and Journal of Functional Analysis.
Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.