Hubert Kalf

965 total citations
38 papers, 509 citations indexed

About

Hubert Kalf is a scholar working on Mathematical Physics, Computational Theory and Mathematics and Applied Mathematics. According to data from OpenAlex, Hubert Kalf has authored 38 papers receiving a total of 509 indexed citations (citations by other indexed papers that have themselves been cited), including 35 papers in Mathematical Physics, 16 papers in Computational Theory and Mathematics and 15 papers in Applied Mathematics. Recurrent topics in Hubert Kalf's work include Spectral Theory in Mathematical Physics (34 papers), Numerical methods in inverse problems (15 papers) and Advanced Mathematical Modeling in Engineering (10 papers). Hubert Kalf is often cited by papers focused on Spectral Theory in Mathematical Physics (34 papers), Numerical methods in inverse problems (15 papers) and Advanced Mathematical Modeling in Engineering (10 papers). Hubert Kalf collaborates with scholars based in Germany, Japan and United States. Hubert Kalf's co-authors include M. S. P. Eastham, Johann Walter, W. N. Everitt, Rainer Hempel, Andréas Hinz, Vinod Kumar, Clemens Markett, Lance L. Littlejohn, Volker Arnold and Ira Herbst and has published in prestigious journals such as Communications on Pure and Applied Mathematics, Transactions of the American Mathematical Society and Archive for Rational Mechanics and Analysis.

In The Last Decade

Hubert Kalf

38 papers receiving 451 citations

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name h Career Trend Papers Cites
Hubert Kalf Germany 13 417 214 178 97 80 38 509
Hagen Neidhardt Germany 15 437 1.0× 271 1.3× 143 0.8× 120 1.2× 81 1.0× 80 571
Isabelle Catto France 10 191 0.5× 114 0.5× 136 0.8× 86 0.9× 62 0.8× 16 331
Richard Lavine United States 12 313 0.8× 112 0.5× 80 0.4× 122 1.3× 112 1.4× 20 387
Konstantin A. Makarov United States 13 347 0.8× 195 0.9× 101 0.6× 104 1.1× 118 1.5× 53 474
Giandomenico Orlandi Italy 11 163 0.4× 101 0.5× 205 1.2× 52 0.5× 104 1.3× 38 402
Plamen Djakov United States 16 563 1.4× 251 1.2× 356 2.0× 43 0.4× 130 1.6× 40 652
Ари Лаптев United Kingdom 16 700 1.7× 407 1.9× 441 2.5× 91 0.9× 74 0.9× 88 884
Mouez Dimassi France 7 428 1.0× 169 0.8× 98 0.6× 128 1.3× 213 2.7× 28 557
Konstantin Pankrashkin France 11 376 0.9× 198 0.9× 95 0.5× 101 1.0× 102 1.3× 54 464
Richard Bolstein United States 4 241 0.6× 165 0.8× 198 1.1× 52 0.5× 72 0.9× 7 390

Countries citing papers authored by Hubert Kalf

Since Specialization
Citations

This map shows the geographic impact of Hubert Kalf'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 Hubert Kalf with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Hubert Kalf more than expected).

Fields of papers citing papers by Hubert Kalf

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Hubert Kalf. 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 Hubert Kalf. The network helps show where Hubert Kalf may publish in the future.

Co-authorship network of co-authors of Hubert Kalf

This figure shows the co-authorship network connecting the top 25 collaborators of Hubert Kalf. A scholar is included among the top collaborators of Hubert Kalf based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Hubert Kalf. Hubert Kalf is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

20 of 20 papers shown
1.
Kalf, Hubert, et al.. (2015). The dirac operator with mass m0 ≥ 0 : Non-existence of zero modes and of threshold eigenvalues. Documenta Mathematica. 20(2015). 37–64. 2 indexed citations
2.
Kalf, Hubert, et al.. (2015). The Dirac operator with mass $m_0 \ge 0$: non-existence of zero modes and of threshold eigenvalues. Documenta Mathematica. 20. 37–64. 1 indexed citations
3.
Everitt, W. N. & Hubert Kalf. (2006). The Bessel differential equation and the Hankel transform. Journal of Computational and Applied Mathematics. 208(1). 3–19. 43 indexed citations
4.
Everitt, W. N., Hubert Kalf, Lance L. Littlejohn, & Clemens Markett. (2006). Fourth-order Bessel equation: eigenpackets and a generalized Hankel transform†. Integral Transforms and Special Functions. 17(12). 845–862. 5 indexed citations
5.
Kalf, Hubert & Karl Michael Schmidt. (2004). Spectral stability of the Coulomb–Dirac Hamiltonian with anomalous magnetic moment. Journal of Differential Equations. 205(2). 408–423. 1 indexed citations
6.
Kalf, Hubert, et al.. (2003). Absence of eigenvalues of Dirac operators with potentials diverging at in‐finity. Mathematische Nachrichten. 259(1). 19–41. 10 indexed citations
7.
Kalf, Hubert, et al.. (1998). On the essential self-adjointness of Schrödinger operators with locally integrable potentials. Proceedings of the Royal Society of Edinburgh Section A Mathematics. 128(1). 95–106. 6 indexed citations
8.
Arnold, Volker, et al.. (1997). Separated Dirac operators and asymptotically constant linear systems. Mathematical Proceedings of the Cambridge Philosophical Society. 121(1). 141–146. 7 indexed citations
9.
Kalf, Hubert. (1995). On the expansion of a function in terms of spherical harmonics in arbitrary dimensions. Bulletin of the Belgian Mathematical Society - Simon Stevin. 2(4). 19 indexed citations
10.
Kalf, Hubert. (1992). On E. E. Levi’s method of constructing a fundamental solution for second-order elliptic equations. Rendiconti del Circolo Matematico di Palermo Series 2. 41(2). 251–294. 8 indexed citations
11.
Kalf, Hubert, et al.. (1990). Subsoluton estimates and Harnack's inequality for Schrödinger operators.. Journal für die reine und angewandte Mathematik (Crelles Journal). 1990(404). 118–134. 14 indexed citations
12.
Kalf, Hubert. (1984). A note on the domain characterization of certain Schrödinger operators with strongly singular potentials. Proceedings of the Royal Society of Edinburgh Section A Mathematics. 97. 125–130. 5 indexed citations
13.
Kalf, Hubert & Vinod Kumar. (1983). On the absence of positive eigenvalues of Schrödinger operators with long range potentials. Transactions of the American Mathematical Society. 275(1). 215–229. 7 indexed citations
14.
Kalf, Hubert, et al.. (1983). On the Absence of Positive Eigenvalues of Schrodinger Operators with Long Range Potentials. Transactions of the American Mathematical Society. 275(1). 215–215. 3 indexed citations
15.
Kalf, Hubert. (1977). Non-existence of eigenvalues of Schrödinger operators. Proceedings of the Royal Society of Edinburgh Section A Mathematics. 79(1-2). 157–172. 8 indexed citations
16.
Kalf, Hubert, et al.. (1975). On positive eigenvalues of one‐body schrödinger operators: Remarks on papers by agmon and simon. Communications on Pure and Applied Mathematics. 28(6). 747–752. 6 indexed citations
17.
Kalf, Hubert. (1974). Remarks on some dirichlet type results for semibounded Sturm-Liouville operators. Mathematische Annalen. 210(3). 197–205. 21 indexed citations
18.
Kalf, Hubert. (1972). On the characterization of the Friedrichs extension of ordinary or elliptic differential operators with a strongly singular potential. Journal of Functional Analysis. 10(2). 230–250. 21 indexed citations
19.
Kalf, Hubert & Johann Walter. (1972). Strongly singular potentials and essential self-adjointness of singular elliptic operators in C0∞(Rn⧹{0}). Journal of Functional Analysis. 10(1). 114–130. 52 indexed citations
20.
Kalf, Hubert. (1972). A limit-point criterion for separated Dirac operators and a little known result on Riccati's equation. Mathematische Zeitschrift. 129(1). 75–82. 7 indexed citations

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.

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