Torsten Ehrhardt

993 total citations
48 papers, 361 citations indexed

About

Torsten Ehrhardt is a scholar working on Applied Mathematics, Mathematical Physics and Computational Theory and Mathematics. According to data from OpenAlex, Torsten Ehrhardt has authored 48 papers receiving a total of 361 indexed citations (citations by other indexed papers that have themselves been cited), including 25 papers in Applied Mathematics, 23 papers in Mathematical Physics and 18 papers in Computational Theory and Mathematics. Recurrent topics in Torsten Ehrhardt's work include Holomorphic and Operator Theory (19 papers), Matrix Theory and Algorithms (16 papers) and Spectral Theory in Mathematical Physics (11 papers). Torsten Ehrhardt is often cited by papers focused on Holomorphic and Operator Theory (19 papers), Matrix Theory and Algorithms (16 papers) and Spectral Theory in Mathematical Physics (11 papers). Torsten Ehrhardt collaborates with scholars based in Germany, United States and Netherlands. Torsten Ehrhardt's co-authors include Bernd Silbermann, Estelle Basor, Harm Bart, Frank‐Olme Speck, Ilya M. Spitkovsky, Karla Rost, Alexei Yu. Karlovich, Dario A. Bini, C. V. M. van der Mee and Leiba Rodman and has published in prestigious journals such as SHILAP Revista de lepidopterología, Communications in Mathematical Physics and Communications on Pure and Applied Mathematics.

In The Last Decade

Torsten Ehrhardt

41 papers receiving 327 citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Torsten Ehrhardt Germany 11 212 196 118 84 79 48 361
Naum Krupnik Israel 10 350 1.7× 267 1.4× 124 1.1× 40 0.5× 89 1.1× 26 502
Peter D Dragnev United States 9 166 0.8× 95 0.5× 76 0.6× 52 0.6× 26 0.3× 40 317
B. V. Rajarama Bhat India 11 78 0.4× 215 1.1× 50 0.4× 49 0.6× 124 1.6× 39 341
Yu‐Qiu Zhao China 11 200 0.9× 58 0.3× 50 0.4× 72 0.9× 42 0.5× 50 291
Leonid Golinskiĭ Ukraine 11 277 1.3× 215 1.1× 173 1.5× 25 0.3× 34 0.4× 48 395
Attila Máté United States 15 490 2.3× 131 0.7× 153 1.3× 37 0.4× 73 0.9× 31 581
J. Bustoz United States 9 335 1.6× 71 0.4× 64 0.5× 49 0.6× 115 1.5× 28 430
Clemens Markett Germany 12 366 1.7× 128 0.7× 63 0.5× 24 0.3× 102 1.3× 42 473
Maurice Duits Sweden 12 108 0.5× 101 0.5× 48 0.4× 147 1.8× 16 0.2× 26 251
Р. С. Исмагилов Russia 10 148 0.7× 189 1.0× 63 0.5× 16 0.2× 36 0.5× 77 351

Countries citing papers authored by Torsten Ehrhardt

Since Specialization
Citations

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

Fields of papers citing papers by Torsten Ehrhardt

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Torsten Ehrhardt

This figure shows the co-authorship network connecting the top 25 collaborators of Torsten Ehrhardt. A scholar is included among the top collaborators of Torsten Ehrhardt 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 Torsten Ehrhardt. Torsten Ehrhardt 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.
Ehrhardt, Torsten & Karla Rost. (2024). Inversion formulas for Toeplitz-plus-Hankel matrices. Linear Algebra and its Applications. 697. 420–442.
2.
Basor, Estelle, et al.. (2022). Asymptotics of Bordered Toeplitz Determinants and Next-to-Diagonal Ising Correlations. Journal of Statistical Physics. 187(1). 1 indexed citations
3.
Basor, Estelle, Albrecht Böttcher, Torsten Ehrhardt, & Craig A. Tracy. (2022). Toeplitz Operators and Random Matrices. 1 indexed citations
4.
Bart, Harm, Torsten Ehrhardt, & Bernd Silbermann. (2020). How Small Can a Sum of Idempotents Be?. Integral Equations and Operator Theory. 92(1).
5.
Bart, Harm, Torsten Ehrhardt, & Bernd Silbermann. (2019). Unions of rank/trace complete preorders. Linear Algebra and its Applications. 570. 181–224. 1 indexed citations
6.
Bart, Harm, Torsten Ehrhardt, & Bernd Silbermann. (2015). Sums of idempotents and logarithmic residues in zero pattern matrix algebras. Linear Algebra and its Applications. 498. 262–316. 6 indexed citations
7.
Bart, Harm, Torsten Ehrhardt, & Bernd Silbermann. (2014). Approximately finite-dimensional Banach algebras are spectrally regular. Linear Algebra and its Applications. 470. 185–199. 2 indexed citations
8.
Basor, Estelle & Torsten Ehrhardt. (2013). Fredholm and invertibility theory for a special class of Toeplitz + Hankel operators. Journal of Spectral Theory. 3(2). 171–214. 9 indexed citations
9.
Ehrhardt, Torsten & Karla Rost. (2012). Resultant matrices and inversion of Bezoutians. Linear Algebra and its Applications. 439(3). 621–639. 6 indexed citations
10.
Bart, Harm, Torsten Ehrhardt, & Bernd Silbermann. (2012). Logarithmic residues, Rouché’s theorem, and spectral regularity: The C∗-algebra case. Indagationes Mathematicae. 23(4). 816–847. 3 indexed citations
11.
Ehrhardt, Torsten & Karla Rost. (2012). On the kernel structure of generalized resultant matrices. Indagationes Mathematicae. 23(4). 1053–1069. 2 indexed citations
12.
Ehrhardt, Torsten & Bernd Silbermann. (2012). Banach algebras of quasi-triangular operators are spectrally regular. Linear Algebra and its Applications. 439(3). 577–583. 1 indexed citations
13.
Ehrhardt, Torsten, Steffen Roch, & Bernd Silbermann. (2010). A Strong Szegö–Widom Limit Theorem for operators with almost periodic diagonal. Journal of Functional Analysis. 260(1). 30–75.
14.
Bart, Harm, Torsten Ehrhardt, & Bernd Silbermann. (2009). Trace conditions for regular spectral behavior of vector-valued analytic functions. Linear Algebra and its Applications. 430(8-9). 1945–1965. 5 indexed citations
15.
Ehrhardt, Torsten. (2005). Dyson's Constant in the Asymptotics of the Fredholm Determinant of the Sine Kernel. Communications in Mathematical Physics. 262(2). 317–341. 40 indexed citations
16.
Ehrhardt, Torsten. (2003). Invertibility theory for Toeplitz plus Hankel operators and singular integral operators with flip. Journal of Functional Analysis. 208(1). 64–106. 26 indexed citations
17.
Ehrhardt, Torsten & Frank‐Olme Speck. (2002). Transformation techniques towards the factorization of non-rational 2×2 matrix functions. Linear Algebra and its Applications. 353(1-3). 53–90. 20 indexed citations
18.
Ehrhardt, Torsten & C. V. M. van der Mee. (2002). Canonical factorization of continuous functions on the 𝑑-torus. Proceedings of the American Mathematical Society. 131(3). 801–813. 6 indexed citations
19.
Basor, Estelle & Torsten Ehrhardt. (2001). . Mathematische Nachrichten. 228(1). 5–45. 1 indexed citations
20.
Ehrhardt, Torsten & Bernd Silbermann. (1997). Toeplitz Determinants with One Fisher–Hartwig Singularity. Journal of Functional Analysis. 148(1). 229–256. 28 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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