Manuel Ojanguren

1.0k total citations
41 papers, 576 citations indexed

About

Manuel Ojanguren is a scholar working on Geometry and Topology, Mathematical Physics and Algebra and Number Theory. According to data from OpenAlex, Manuel Ojanguren has authored 41 papers receiving a total of 576 indexed citations (citations by other indexed papers that have themselves been cited), including 27 papers in Geometry and Topology, 15 papers in Mathematical Physics and 14 papers in Algebra and Number Theory. Recurrent topics in Manuel Ojanguren's work include Algebraic Geometry and Number Theory (16 papers), Advanced Algebra and Geometry (12 papers) and Algebraic structures and combinatorial models (12 papers). Manuel Ojanguren is often cited by papers focused on Algebraic Geometry and Number Theory (16 papers), Advanced Algebra and Geometry (12 papers) and Algebraic structures and combinatorial models (12 papers). Manuel Ojanguren collaborates with scholars based in Switzerland, India and France. Manuel Ojanguren's co-authors include Max-Albert Knus, Jean-Louis Colliot-Thélène, R. Sridharan, Ivan Panin, R. Parimala, V. Suresh, Martin Kneser, Kirill Zainoulline and Michel Kervaire and has published in prestigious journals such as Lecture notes in mathematics, Inventiones mathematicae and Proceedings of the American Mathematical Society.

In The Last Decade

Manuel Ojanguren

33 papers receiving 442 citations

Peers

Manuel Ojanguren

GT

ANT

MP

DMC

CTM

R. Sridharan India

Orlando E. Villamayor Spain

Holger P. Petersson Germany

H�l�ne Esnault Germany

Dock Sang Rim United States

Ted Chinburg United States

Daniel Zelinsky United States

Brad Shelton United States

Jacques Lewin United States

Kaan Akın United States

R. Sridharan India

Manuel Ojanguren

465 ×1.0

GT

416 ×1.4

ANT

238 ×0.8

MP

64 ×0.8

DMC

91 ×1.3

CTM

Citations per year, relative to Manuel Ojanguren Manuel Ojanguren (= 1×) peers R. Sridharan

Countries citing papers authored by Manuel Ojanguren

Since Specialization

Citations

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

Fields of papers citing papers by Manuel Ojanguren

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Manuel Ojanguren

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

1.

Ojanguren, Manuel. (2018). Da Wallis a Ramanujan, in compagnia di R.W. Gosper. Expositiones Mathematicae. 36(3-4). 325–342.

2.

Colliot-Thélène, Jean-Louis, Manuel Ojanguren, & R. Parimala. (2002). Quadratic forms over fraction fields of two-dimensional Henselian rings and Brauer groups of related schemes. Infoscience (Ecole Polytechnique Fédérale de Lausanne). 16. 185–217. 22 indexed citations

3.

Ojanguren, Manuel, et al.. (2001). Concentración sérica de cortisol en tres franjas horarias en pacientes con enfermedad aguda no crítica. Medicina Clínica. 117(7). 254–256. 2 indexed citations

4.

Ojanguren, Manuel & Ivan Panin. (2001). Rationally trivial hermitian spaces are locally trivial. Mathematische Zeitschrift. 237(1). 181–198. 25 indexed citations

5.

Ojanguren, Manuel, et al.. (1995). Sur le troisième invariant d'une forme quadratique. K-Theory. 9(3). 233–244. 1 indexed citations

6.

Ojanguren, Manuel. (1990). The Witt group and the problem of Lüroth.. Infoscience (Ecole Polytechnique Fédérale de Lausanne). 3 indexed citations

7.

Ojanguren, Manuel & R. Parimala. (1990). Projective modules over real affine algebras. Mathematische Annalen. 287(1). 181–184. 4 indexed citations

8.

Ojanguren, Manuel, R. Parimala, & R. Sridharan. (1987). Anisotropic quadratic spaces over the plane. HIV Medicine. 11(3). 465–489.

9.

Ojanguren, Manuel, et al.. (1987). The Witt group of a real surface. Infoscience (Ecole Polytechnique Fédérale de Lausanne). 11. 445–463.

10.

Kneser, Martin, Max-Albert Knus, Manuel Ojanguren, R. Parimala, & R. Sridharan. (1986). Composition of quaternary quadratic forms. Compositio Mathematica. 60(2). 133–150. 8 indexed citations

11.

Ojanguren, Manuel, R. Parimala, & R. Sridharan. (1983). Indecomposable quadratic bundles of rank 4n over the real affine plane. Inventiones mathematicae. 71(3). 643–653. 3 indexed citations

12.

Knus, Max-Albert, Manuel Ojanguren, & R. Parimala. (1982). Positive-definite quadratic bundles over the plane. Commentarii Mathematici Helvetici. 57(1). 400–411. 4 indexed citations

13.

Ojanguren, Manuel. (1980). Quadratic forms over regular rings. Journal of the Indian Mathematical Society. 44. 109–116. 26 indexed citations

14.

Ojanguren, Manuel. (1978). Formes quadratiques sur les algèbres de polynômes. Infoscience (Ecole Polytechnique Fédérale de Lausanne). 287(9). 11 indexed citations

15.

Knus, Max-Albert & Manuel Ojanguren. (1975). A norm for modules and algebras. Mathematische Zeitschrift. 142(1). 33–45. 6 indexed citations

16.

Ojanguren, Manuel, et al.. (1974). A Mayer-Vietoris sequence for the Brauer group. Journal of Pure and Applied Algebra. 5(3). 345–360. 18 indexed citations

17.

Knus, Max-Albert & Manuel Ojanguren. (1974). Théorie de la Descente et Algèbres d'Azumaya. Lecture notes in mathematics. 163 indexed citations

18.

Ojanguren, Manuel, et al.. (1972). Sur quelques applications de la théorie de la descente à l’étude du groupe de Brauer. Commentarii Mathematici Helvetici. 47(1). 532–542. 1 indexed citations

19.

Ojanguren, Manuel & R. Sridharan. (1971). Cancellation of Azumaya algebras. Journal of Algebra. 18(4). 501–505. 40 indexed citations

20.

Ojanguren, Manuel & R. Sridharan. (1969). A note on purely inseparable extensions. Commentarii Mathematici Helvetici. 44(1). 457–461.

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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