Joachim Weidmann

3.1k total citations · 2 hit papers
30 papers, 1.9k citations indexed

About

Joachim Weidmann is a scholar working on Mathematical Physics, Computational Theory and Mathematics and Statistical and Nonlinear Physics. According to data from OpenAlex, Joachim Weidmann has authored 30 papers receiving a total of 1.9k indexed citations (citations by other indexed papers that have themselves been cited), including 23 papers in Mathematical Physics, 14 papers in Computational Theory and Mathematics and 6 papers in Statistical and Nonlinear Physics. Recurrent topics in Joachim Weidmann's work include Spectral Theory in Mathematical Physics (21 papers), Matrix Theory and Algorithms (9 papers) and Advanced Mathematical Modeling in Engineering (7 papers). Joachim Weidmann is often cited by papers focused on Spectral Theory in Mathematical Physics (21 papers), Matrix Theory and Algorithms (9 papers) and Advanced Mathematical Modeling in Engineering (7 papers). Joachim Weidmann collaborates with scholars based in Germany, United States and Croatia. Joachim Weidmann's co-authors include Karl Gustafson, W. N. Everitt, Günter Stolz, Konrad Jörgens, Paul B. Bailey, Anton Zettl, Krešimir Veselić, M. Giertz, Hagen Neidhardt and Johannes F. Brasche and has published in prestigious journals such as Communications on Pure and Applied Mathematics, Lecture notes in mathematics and Journal of Mathematical Analysis and Applications.

In The Last Decade

Joachim Weidmann

30 papers receiving 1.7k citations

Hit Papers

Linear Operators in Hilbert Spaces 1980 2026 1995 2010 1980 1987 200 400 600
What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

  1. Linear Operators in Hilbert Spaces
    1980 664 citations Joachim Weidmann Graduate texts in mathematics profile →
  2. Spectral Theory of Ordinary Differential Operators
    1987 497 citations Joachim Weidmann Lecture notes in mathematics profile →

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Joachim Weidmann Germany 16 1.4k 732 659 412 334 30 1.9k
Heinz Langer Germany 24 1.5k 1.1× 1.1k 1.6× 909 1.4× 350 0.8× 251 0.8× 141 2.3k
B. M. Levitan Israel 15 1.4k 1.0× 765 1.0× 900 1.4× 430 1.0× 158 0.5× 52 2.1k
M. A. Naĭmark United States 6 902 0.6× 624 0.9× 684 1.0× 262 0.6× 172 0.5× 16 1.7k
Michael Loss United States 25 1.5k 1.1× 755 1.0× 1.4k 2.1× 460 1.1× 471 1.4× 80 2.7k
M. Sh. Birman Russia 19 1.0k 0.7× 807 1.1× 517 0.8× 129 0.3× 149 0.4× 56 1.6k
W. N. Everitt United Kingdom 28 1.7k 1.2× 1.0k 1.4× 1.2k 1.9× 405 1.0× 164 0.5× 147 2.3k
Leonard Gross United States 22 1.4k 1.0× 551 0.8× 1.3k 2.0× 296 0.7× 209 0.6× 51 2.5k
Peter D. Hislop United States 18 1.1k 0.8× 546 0.7× 291 0.4× 496 1.2× 412 1.2× 79 1.7k
Raphaël Høegh-Krohn Norway 25 2.0k 1.4× 572 0.8× 602 0.9× 1.1k 2.6× 1.1k 3.3× 70 3.2k
Ira Herbst United States 26 1.6k 1.1× 516 0.7× 442 0.7× 835 2.0× 1.1k 3.3× 65 2.6k

Countries citing papers authored by Joachim Weidmann

Since Specialization
Citations

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

Fields of papers citing papers by Joachim Weidmann

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Joachim Weidmann

This figure shows the co-authorship network connecting the top 25 collaborators of Joachim Weidmann. A scholar is included among the top collaborators of Joachim Weidmann 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 Joachim Weidmann. Joachim Weidmann 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.
Weidmann, Joachim. (2003). Lineare Operatoren in Hilberträumen. 25 indexed citations
2.
Weidmann, Joachim. (2000). Lineare Operatoren in Hilberträumen. 70 indexed citations
3.
Weidmann, Joachim. (1996). Uniform Nonsubordinacy and the Absolutely Continuous Spectrum. Analysis. 16(1). 89–100. 4 indexed citations
4.
Stolz, Günter, et al.. (1995). One-dimensional Schrödinger operators with local point interactions.. Journal für die reine und angewandte Mathematik (Crelles Journal). 1995(467). 169–186. 32 indexed citations
5.
Brasche, Johannes F., Hagen Neidhardt, & Joachim Weidmann. (1993). On the point spectrum of self-adjoint extensions. Mathematische Zeitschrift. 214(1). 343–355. 12 indexed citations
6.
Stolz, Günter, et al.. (1989). Expansions in generalized eigenfunctions of selfadjoint operators. Mathematische Zeitschrift. 202(3). 397–408. 22 indexed citations
7.
Weidmann, Joachim. (1987). Spectral Theory of Ordinary Differential Operators. Lecture notes in mathematics. 497 indexed citations breakdown →
8.
9.
Weidmann, Joachim. (1984). Stetige Abhängigkeit der Eigenwerte und Eigenfunktionen elliptischer Differentialoperatoren vom Gebiet.. MATHEMATICA SCANDINAVICA. 54. 51–51. 24 indexed citations
10.
Weidmann, Joachim. (1980). Linear Operators in Hilbert Spaces. Graduate texts in mathematics. 664 indexed citations breakdown →
11.
Veselić, Krešimir & Joachim Weidmann. (1974). Asymptotic estimates of wave functions and the existence of wave operators. Journal of Functional Analysis. 17(1). 61–77. 10 indexed citations
12.
Everitt, W. N., M. Giertz, & Joachim Weidmann. (1973). Some remarks on a separation and limit-point criterion of second-order, ordinary differential expressions. Mathematische Annalen. 200(4). 335–346. 33 indexed citations
13.
Jörgens, Konrad & Joachim Weidmann. (1973). Spectral Properties of Hamiltonian Operators. Lecture notes in mathematics. 45 indexed citations
14.
Weidmann, Joachim. (1971). Oszillationsmethoden f�r Systeme gew�hnlicher Differentialgleichungen. Mathematische Zeitschrift. 119(4). 349–373. 63 indexed citations
15.
Weidmann, Joachim. (1970). Carlemanoperatoren. manuscripta mathematica. 2(1). 1–38. 10 indexed citations
16.
Gustafson, Karl & Joachim Weidmann. (1969). On the essential spectrum. Journal of Mathematical Analysis and Applications. 25(1). 121–127. 78 indexed citations
17.
Weidmann, Joachim. (1968). Strong Carleman operators are of Hilbert-Schmidt type. Bulletin of the American Mathematical Society. 74(4). 735–737. 3 indexed citations
18.
Weidmann, Joachim. (1967). The virial theorem and its application to the spectral theory of Schrödinger operators. Bulletin of the American Mathematical Society. 73(3). 452–456. 62 indexed citations
19.
Weidmann, Joachim. (1966). On the continuous spectrum of schrödinger operators. Communications on Pure and Applied Mathematics. 19(1). 107–110. 20 indexed citations
20.
Weidmann, Joachim. (1965). Ein Satz �ber nukleare Operatoren im Hilbertraum. Mathematische Annalen. 158(2). 69–78. 2 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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