Félix Ulmer

1.4k total citations
25 papers, 707 citations indexed

About

Félix Ulmer is a scholar working on Computational Theory and Mathematics, Geometry and Topology and Discrete Mathematics and Combinatorics. According to data from OpenAlex, Félix Ulmer has authored 25 papers receiving a total of 707 indexed citations (citations by other indexed papers that have themselves been cited), including 13 papers in Computational Theory and Mathematics, 9 papers in Geometry and Topology and 8 papers in Discrete Mathematics and Combinatorics. Recurrent topics in Félix Ulmer's work include Polynomial and algebraic computation (12 papers), Finite Group Theory Research (8 papers) and Algebraic Geometry and Number Theory (7 papers). Félix Ulmer is often cited by papers focused on Polynomial and algebraic computation (12 papers), Finite Group Theory Research (8 papers) and Algebraic Geometry and Number Theory (7 papers). Félix Ulmer collaborates with scholars based in France, United States and Germany. Félix Ulmer's co-authors include Delphine Boucher, Michael F. Singer, Willi Geiselmann, Jacques-Arthur Weil, Patrick Solé, Marius van der Put, Mark van Hoeij, Pierre Loidreau, Barry Trager and Jacques Calmet and has published in prestigious journals such as Theoretical Computer Science, Journal of Algebra and Journal of Pure and Applied Algebra.

In The Last Decade

Félix Ulmer

23 papers receiving 643 citations

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
Félix Ulmer France	13	388	313	208	197	193	25	707
Pantelimon Stănică United States	15	700 1.8×	220 0.7×	411 2.0×	63 0.3×	115 0.6×	121	920
Tamás Szőnyi Hungary	16	525 1.4×	193 0.6×	447 2.1×	191 1.0×	635 3.3×	75	945
Ilia Krasikov Israel	12	171 0.4×	191 0.6×	132 0.6×	68 0.3×	78 0.4×	71	563
Dragomir Ž. Ðoković Canada	15	183 0.5×	179 0.6×	189 0.9×	350 1.8×	151 0.8×	120	784
Pingzhi Yuan China	15	413 1.1×	184 0.6×	372 1.8×	229 1.2×	238 1.2×	108	853
Manuel Kauers Austria	18	201 0.5×	460 1.5×	88 0.4×	127 0.6×	210 1.1×	79	822
John Brillhart United States	16	378 1.0×	309 1.0×	95 0.5×	278 1.4×	155 0.8×	77	1.1k
W. H. Mills United States	15	244 0.6×	153 0.5×	305 1.5×	162 0.8×	310 1.6×	32	659
N. L. Biggs United Kingdom	17	155 0.4×	283 0.9×	179 0.9×	204 1.0×	323 1.7×	34	718
Neil J. Calkin United States	11	137 0.4×	240 0.8×	56 0.3×	121 0.6×	177 0.9×	48	504

Countries citing papers authored by Félix Ulmer

Since Specialization

Citations

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

Fields of papers citing papers by Félix Ulmer

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Félix Ulmer

This figure shows the co-authorship network connecting the top 25 collaborators of Félix Ulmer. A scholar is included among the top collaborators of Félix Ulmer 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 Félix Ulmer. Félix Ulmer 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

Boucher, Delphine & Félix Ulmer. (2013). Self-dual skew codes and factorization of skew polynomials. Journal of Symbolic Computation. 60. 47–61. 12 indexed citations

Boucher, Delphine & Félix Ulmer. (2012). Linear codes using skew polynomials with automorphisms and derivations. Designs Codes and Cryptography. 70(3). 405–431. 51 indexed citations

Boucher, Delphine & Félix Ulmer. (2008). Coding with skew polynomial rings. Journal of Symbolic Computation. 44(12). 1644–1656. 103 indexed citations

Loray, Frank, Marius van der Put, & Félix Ulmer. (2008). The Lamé family of connections on the projective line. Annales de la faculté des sciences de Toulouse Mathématiques. 17(2). 371–409. 5 indexed citations

Loidreau, Pierre, et al.. (2008). Skew codes of prescribed distance or rank. Designs Codes and Cryptography. 50(3). 267–284. 15 indexed citations

Boucher, Delphine, Willi Geiselmann, & Félix Ulmer. (2007). Skew-cyclic codes. Applicable Algebra in Engineering Communication and Computing. 18(4). 379–389. 126 indexed citations

Ulmer, Félix. (2005). Note on algebraic solutions of differential equations with known finite Galois group. Applicable Algebra in Engineering Communication and Computing. 16(4). 205–218.

Ulmer, Félix. (2003). Liouvillian solutions of third order differential equations. Journal of Symbolic Computation. 36(6). 855–889. 9 indexed citations

Singer, Michael F., et al.. (2002). Linear Differential Operators for Polynomial Equations. Journal of Symbolic Computation. 34(5). 355–398. 16 indexed citations

10.

Put, Marius van der & Félix Ulmer. (2000). Differential Equations and Finite Groups. Journal of Algebra. 226(2). 920–966. 15 indexed citations

11.

Hoeij, Mark van, et al.. (1999). Liouvillian Solutions of Linear Differential Equations of Order Three and Higher. Journal of Symbolic Computation. 28(4-5). 589–609. 30 indexed citations

12.

Singer, Michael F. & Félix Ulmer. (1997). Linear differential equations and products of linear forms. Journal of Pure and Applied Algebra. 117-118. 549–563. 14 indexed citations

13.

Ulmer, Félix, et al.. (1997). Constructing a third-order linear differential equation. Theoretical Computer Science. 187(1-2). 3–6. 4 indexed citations

14.

Ulmer, Félix & Jacques-Arthur Weil. (1996). Note on Kovacic's Algorithm. Journal of Symbolic Computation. 22(2). 179–200. 50 indexed citations

15.

Ulmer, Félix & Jacques-Arthur Weil. (1995). Note on Kovacic's algorithm. ACM SIGSAM Bulletin. 29(2). 10–11. 4 indexed citations

16.

Singer, Michael F. & Félix Ulmer. (1995). Necessary conditions for liouvillian solutions of (third order) linear differential equations. Applicable Algebra in Engineering Communication and Computing. 6(1). 1–22. 31 indexed citations

17.

Ulmer, Félix. (1994). Irreducible Linear Differential Equations of Prime Order. Journal of Symbolic Computation. 18(4). 385–401. 4 indexed citations

18.

Singer, Michael F. & Félix Ulmer. (1993). Galois Groups of Second and Third Order Linear Differential Equations. Journal of Symbolic Computation. 16(1). 9–36. 71 indexed citations

19.

Singer, Michael F. & Félix Ulmer. (1993). Liouvillian and Algebraic Solutions of Second and Third Order Linear Differential Equations. Journal of Symbolic Computation. 16(1). 37–73. 49 indexed citations

20.

Singer, Michael F. & Félix Ulmer. (1992). Liouvillian solutions of third order linear differential equations. 57–62. 4 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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