Heinz Langer

5.0k total citations
141 papers, 2.3k citations indexed

About

Heinz Langer is a scholar working on Mathematical Physics, Computational Theory and Mathematics and Applied Mathematics. According to data from OpenAlex, Heinz Langer has authored 141 papers receiving a total of 2.3k indexed citations (citations by other indexed papers that have themselves been cited), including 93 papers in Mathematical Physics, 75 papers in Computational Theory and Mathematics and 51 papers in Applied Mathematics. Recurrent topics in Heinz Langer's work include Spectral Theory in Mathematical Physics (75 papers), Matrix Theory and Algorithms (46 papers) and Advanced Mathematical Modeling in Engineering (33 papers). Heinz Langer is often cited by papers focused on Spectral Theory in Mathematical Physics (75 papers), Matrix Theory and Algorithms (46 papers) and Advanced Mathematical Modeling in Engineering (33 papers). Heinz Langer collaborates with scholars based in Germany, Austria and Netherlands. Heinz Langer's co-authors include M. Г. Крейн, Christiane Tretter, Aad Dijksma, Branko Najman, Branko Ćurgus, R. Mennicken, A. Markus, F. V. Atkinson, А. А. Шкаликов and V. Matsaev and has published in prestigious journals such as Communications in Mathematical Physics, Journal of Magnetism and Magnetic Materials and Journal of Mathematical Analysis and Applications.

In The Last Decade

Heinz Langer

138 papers receiving 1.9k citations

Peers

Heinz Langer

CTM

SNP

AMPO

W. N. Everitt United Kingdom

Joachim Weidmann Germany

Anton Zettl United States

Leonard Gross United States

F. V. Atkinson Canada

M. A. Naĭmark United States

R. Seeley United States

Harry Hochstadt United States

B. M. Levitan Israel

M. S. P. Eastham United Kingdom

W. N. Everitt United Kingdom

Heinz Langer

1.7k ×1.1

1.0k ×0.9

CTM

1.2k ×1.4

405 ×1.2

SNP

164 ×0.7

AMPO

Citations per year, relative to Heinz Langer Heinz Langer (= 1×) peers W. N. Everitt

Countries citing papers authored by Heinz Langer

Since Specialization

Citations

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

Fields of papers citing papers by Heinz Langer

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Heinz Langer

This figure shows the co-authorship network connecting the top 25 collaborators of Heinz Langer. A scholar is included among the top collaborators of Heinz Langer 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 Heinz Langer. Heinz Langer is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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20 of 20 papers shown

Alpay, Daniel, Aad Dijksma, & Heinz Langer. (2006). Jℓ-unitary factorization and the Schur algorithm for Nevanlinna functions in an indefinite setting. Linear Algebra and its Applications. 419(2-3). 675–709. 2 indexed citations

Bátkai, András, Paul Binding, Aad Dijksma, Rostyslav Hryniv, & Heinz Langer. (2005). Spectral problems for operator matrices. University of Groningen research database (University of Groningen / Centre for Information Technology). 22 indexed citations

Binding, Paul, Heinz Langer, & Manfred Möller. (2004). Oscillation results for Sturm–Liouville problems with an indefinite weight function. Journal of Computational and Applied Mathematics. 171(1-2). 93–101. 5 indexed citations

Gohberg, Israel, Heinz Langer, & Peter Lancaster. (2002). Linear operators and matrices : the Peter Lancaster anniversary volume. CERN Document Server (European Organization for Nuclear Research). 2 indexed citations

Binding, Paul, Rostyslav Hryniv, Heinz Langer, & Branko Najman. (2001). Elliptic Eigenvalue Problems with Eigenparameter Dependent Boundary Conditions. Journal of Differential Equations. 174(1). 30–54. 19 indexed citations

Adamjan, Vadim, Heinz Langer, & Christiane Tretter. (2001). Existence and Uniqueness of Contractive Solutions of Some Riccati Equations. Journal of Functional Analysis. 179(2). 448–473. 22 indexed citations

Adamjan, Vadim, Heinz Langer, & Matthias Langer. (2001). A Spectral Theory for a λ-Rational Sturm–Liouville Problem. Journal of Differential Equations. 171(2). 315–345. 14 indexed citations

Langer, Heinz & Annemarie Luger. (2000). A class of 2 * 2 - matrix functions. Glasnik Matematicki. 35(1). 149–160. 5 indexed citations

Langer, Heinz, André C. M. Ran, & Dirk Temme. (1997). Nonnegative solutions of algebraic Riccati equations. Linear Algebra and its Applications. 261(1-3). 317–352. 5 indexed citations

10.

Böttcher, Albrecht, Aad Dijksma, Heinz Langer, et al.. (1995). Lectures on Operator Theory and Its Applications. American Mathematical Society eBooks. 33 indexed citations

11.

Gohberg, Israel, et al.. (1995). Operator Theory and Boundary Eigenvalue Problems : International Workshop in Vienna, July 27-30, 1993. Birkhäuser-Verlag eBooks. 1 indexed citations

12.

Ćurgus, Branko & Heinz Langer. (1989). A Krein space approach to symmetric ordinary differential operators with an indefinite weight function. Journal of Differential Equations. 79(1). 31–61. 88 indexed citations

13.

Langer, Heinz & Branko Najman. (1985). Some interlacing results for indefinite Hermitian matrices. Linear Algebra and its Applications. 69. 131–154. 5 indexed citations

14.

Langer, Heinz, et al.. (1980). A class of infinitesimal generators of one- dimensional Markov processes II. Invariant measures. Journal of the Mathematical Society of Japan. 32(1). 3 indexed citations

15.

Крейн, M. Г. & Heinz Langer. (1978). Über einige Fortsetzungsprobleme, die eng mit der Theorie hermitescher Operatoren im Raume Πκ zusammenhängen. II. Verallgemeinerte Resolventen, u-Resolventen und ganze Operatoren. Journal of Functional Analysis. 30(3). 390–447. 38 indexed citations

16.

Langer, Heinz, et al.. (1977). Some remarks on a paper by W. N. Everitt. Proceedings of the Royal Society of Edinburgh Section A Mathematics. 78(1-2). 71–79. 3 indexed citations

17.

Langer, Heinz. (1976). A class of infinitesimal generators of one-dimensional Markov processes. Journal of the Mathematical Society of Japan. 28(2). 8 indexed citations

18.

Langer, Heinz. (1975). Invariant subspaces for a class of operators in spaces with indefinite metric. Journal of Functional Analysis. 19(3). 232–241. 9 indexed citations

19.

Langer, Heinz. (1974). Über eine Klasse polynomialer Scharen selbstadjungierter Operatoren im Hilbertraum. II. Journal of Functional Analysis. 16(2). 221–234. 15 indexed citations

20.

Langer, Heinz. (1973). Über eine Klasse polynomialer Scharen selbstadjungierter Operatoren im Hilbertraum. Journal of Functional Analysis. 12(1). 13–29. 17 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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