Helmut Röhrl

661 total citations
32 papers, 428 citations indexed

About

Helmut Röhrl is a scholar working on Geometry and Topology, Applied Mathematics and Algebra and Number Theory. According to data from OpenAlex, Helmut Röhrl has authored 32 papers receiving a total of 428 indexed citations (citations by other indexed papers that have themselves been cited), including 14 papers in Geometry and Topology, 12 papers in Applied Mathematics and 11 papers in Algebra and Number Theory. Recurrent topics in Helmut Röhrl's work include Advanced Differential Equations and Dynamical Systems (6 papers), Rings, Modules, and Algebras (6 papers) and Algebraic Geometry and Number Theory (4 papers). Helmut Röhrl is often cited by papers focused on Advanced Differential Equations and Dynamical Systems (6 papers), Rings, Modules, and Algebras (6 papers) and Algebraic Geometry and Number Theory (4 papers). Helmut Röhrl collaborates with scholars based in United States and Germany. Helmut Röhrl's co-authors include Saunders MacLane, David K. Harrison, Samuel Eilenberg, Alfred Aeppli, Eugenio Calabi, Ulrich Oberst, Sebastian Walcher and Jay P. Fillmore and has published in prestigious journals such as Transactions of the American Mathematical Society, Journal of Differential Equations and Bulletin of the American Mathematical Society.

In The Last Decade

Helmut Röhrl

26 papers receiving 337 citations

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
Helmut Röhrl United States	13	246	187	147	131	62	32	428
Walter Roelcke Germany	10	257 1.0×	336 1.8×	189 1.3×	83 0.6×	51 0.8×	24	474
Ichirô Amemiya Japan	11	101 0.4×	162 0.9×	105 0.7×	92 0.7×	107 1.7×	29	361
N. Th. Varopoulos France	13	148 0.6×	293 1.6×	115 0.8×	247 1.9×	79 1.3×	29	484
David M. Topping United States	10	101 0.4×	289 1.5×	340 2.3×	140 1.1×	192 3.1×	19	497
Raphaël Salem	2	89 0.4×	207 1.1×	43 0.3×	111 0.8×	111 1.8×	4	343
J. Marshall Ash United States	11	105 0.4×	136 0.7×	57 0.4×	227 1.7×	50 0.8×	82	415
J. Bustoz United States	9	79 0.3×	71 0.4×	115 0.8×	335 2.6×	64 1.0×	28	430
Arthur A. Sagle United States	8	202 0.8×	62 0.3×	208 1.4×	38 0.3×	47 0.8×	17	285
Yu. S. Samoĭlenko Ukraine	12	175 0.7×	298 1.6×	248 1.7×	99 0.8×	82 1.3×	61	414
Robert J. Blattner United States	12	456 1.9×	351 1.9×	473 3.2×	63 0.5×	75 1.2×	18	666

Countries citing papers authored by Helmut Röhrl

Since Specialization

Citations

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

Fields of papers citing papers by Helmut Röhrl

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Helmut Röhrl

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

Röhrl, Helmut & Sebastian Walcher. (1997). Projections of Polynomial Vector Fields and the Poincaré Sphere. Journal of Differential Equations. 139(1). 22–40. 5 indexed citations

Röhrl, Helmut, et al.. (1996). Convexity theories 0 fin. foundations. Publicacions Matemàtiques. 40. 469–496. 2 indexed citations

Röhrl, Helmut, et al.. (1992). Totally convex algebras. Commentationes Mathematicae Universitatis Carolinae. 33(2). 205–235. 1 indexed citations

Röhrl, Helmut, et al.. (1990). Congruence relations on totally convex spaces. Communications in Algebra. 18(5). 1469–1496. 6 indexed citations

Röhrl, Helmut. (1977). Algebras and differential equations. Nagoya Mathematical Journal. 68. 59–122. 16 indexed citations

Oberst, Ulrich & Helmut Röhrl. (1970). Flat and coherent functors. Journal of Algebra. 14(1). 91–105. 29 indexed citations

Röhrl, Helmut. (1969). A Categorical setting for Determinants and Traces. Nagoya Mathematical Journal. 34. 35–76. 2 indexed citations

Eilenberg, Samuel, David K. Harrison, Saunders MacLane, & Helmut Röhrl. (1966). Proceedings of the Conference on Categorical Algebra. CERN Document Server (European Organization for Nuclear Research). 90 indexed citations

Aeppli, Alfred, Eugenio Calabi, & Helmut Röhrl. (1965). PROCEEDINGS OF THE CONFERENCE ON COMPLEX ANALYSIS, MINNEAPOLIS 1964.. Defense Technical Information Center (DTIC). 11 indexed citations

10.

Röhrl, Helmut. (1963). A note on the map H1(X,Gw)→H1(X,Gc) for certain complex manifolds. Topology. 2(3). 247–252. 5 indexed citations

11.

Röhrl, Helmut. (1963). Unbounded Coverings of Riemann Surfaces and Extensions of Rings of Meromorphic Functions. Transactions of the American Mathematical Society. 107(2). 320–320. 13 indexed citations

12.

Röhrl, Helmut. (1962). Holomorphic fiber bundles over Riemann surfaces. Bulletin of the American Mathematical Society. 68(3). 125–160. 19 indexed citations

13.

Röhrl, Helmut. (1961). On holomorphic families of fiber bundles over the Riemannian sphere. Kyoto journal of mathematics. 33(3). 14 indexed citations

14.

Röhrl, Helmut. (1957). Das Riemann-Hilbertsche Problem der Theorie der linearen Differentialgleichungen. Mathematische Annalen. 133(5). 472–472. 29 indexed citations

15.

Röhrl, Helmut. (1953). Fabersche Entwicklungen und die Sätze von Weierstrasz und Mittag-Leffler aufRiemannschen Flächen endlichen Geschlechts. Archiv der Mathematik. 4(4). 298–307. 3 indexed citations

16.

Röhrl, Helmut. (1952). Über Differentialsysteme, welche aus multiplikativen Klassen mit exponentiellen Singularitäten entspringen. III. Mathematische Annalen. 125(1). 448–466. 2 indexed citations

17.

Röhrl, Helmut. (1952). Die Elementartheoreme der Funktionenklassen auf geschlossenen Riemannschen Flächen. Mathematische Nachrichten. 7(2). 65–84. 5 indexed citations

18.

Röhrl, Helmut. (1951). Über Differentialsysteme, welche aus multiplikativen Klassen mit exponentiellen Singularitäten entspringen. II. Mathematische Annalen. 124(1). 187–218. 1 indexed citations

19.

Röhrl, Helmut. (1951). Über Differentialsysteme, welche aus multiplikativen Klassen mit exponentiellen Singularitäten entspringen. I. Mathematische Annalen. 123(1). 53–75. 5 indexed citations

20.

Röhrl, Helmut. (1951). Funktionenklassen auf geschlossenen Riemannschen Flächen. Mathematische Nachrichten. 6(6). 355–384. 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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