Robert J. Zimmer

3.2k total citations · 1 hit paper
87 papers, 1.8k citations indexed

About

Robert J. Zimmer is a scholar working on Mathematical Physics, Geometry and Topology and Applied Mathematics. According to data from OpenAlex, Robert J. Zimmer has authored 87 papers receiving a total of 1.8k indexed citations (citations by other indexed papers that have themselves been cited), including 66 papers in Mathematical Physics, 47 papers in Geometry and Topology and 19 papers in Applied Mathematics. Recurrent topics in Robert J. Zimmer's work include Advanced Algebra and Geometry (33 papers), Geometric and Algebraic Topology (25 papers) and Advanced Operator Algebra Research (25 papers). Robert J. Zimmer is often cited by papers focused on Advanced Algebra and Geometry (33 papers), Geometric and Algebraic Topology (25 papers) and Advanced Operator Algebra Research (25 papers). Robert J. Zimmer collaborates with scholars based in United States, Israel and Canada. Robert J. Zimmer's co-authors include Garrett Stuck, Amos Nevo, Alexander Lubotzky, David Fisher, Benson Farb, Ralf Spatzier, Michael Cowling, François Labourie, Kevin Corlette and Calvin C. Moore and has published in prestigious journals such as Annals of Mathematics, Transactions of the American Mathematical Society and Inventiones mathematicae.

In The Last Decade

Robert J. Zimmer

77 papers receiving 1.4k citations

Hit Papers

Ergodic Theory and Semisimple Groups 1984 2026 1998 2012 1984 100 200 300 400 500
What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

  1. Ergodic Theory and Semisimple Groups
    1984 520 citations Robert J. Zimmer profile →

Peers

Robert J. Zimmer
M. S. Raghunathan India
S. J. Patterson Germany
Mark Mahowald United States
Pierre de la Harpe Switzerland
Roger Godement France
J. M. G. Fell United States
Benson Farb United States
Henri Gillet United States
Ichirō Satake Japan
Yves Benoist France
M. S. Raghunathan India
Robert J. Zimmer
Citations per year, relative to Robert J. Zimmer Robert J. Zimmer (= 1×) peers M. S. Raghunathan

Countries citing papers authored by Robert J. Zimmer

Since Specialization
Citations

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

Fields of papers citing papers by Robert J. Zimmer

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Robert J. Zimmer. 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 Robert J. Zimmer. The network helps show where Robert J. Zimmer may publish in the future.

Co-authorship network of co-authors of Robert J. Zimmer

This figure shows the co-authorship network connecting the top 25 collaborators of Robert J. Zimmer. A scholar is included among the top collaborators of Robert J. Zimmer 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 Robert J. Zimmer. Robert J. Zimmer 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.
Zimmer, Robert J., et al.. (2009). Poljoprivredna tehnika u ratarstvu.
2.
Doran, Robert S., Calvin C. Moore, & Robert J. Zimmer. (2008). Group representations, ergodic theory, and mathematical physics : a tribute to George W. Mackey : AMS special session honoring the memory of George W. Mackey, January 7-8, 2007, New Orleans, Louisiana. American Mathematical Society eBooks. 1 indexed citations
3.
Zimmer, Robert J. & Dave Witte Morris. (2008). Ergodic Theory, Groups, and Geometry. 6 indexed citations
4.
Nevo, Amos & Robert J. Zimmer. (2005). Entropy of Stationary Measures and Bounded Tangential de-Rham Cohomology of Semisimple Lie Group Actions. Geometriae Dedicata. 115(1). 181–199.
5.
Zimmer, Robert J.. (2004). Entropy and Arithmetic Quotients for Simple Automorphism Groups of Geometric Manifolds. Geometriae Dedicata. 107(1). 47–56. 2 indexed citations
6.
Lubotzky, Alexander & Robert J. Zimmer. (2001). Arithmetic structure of fundamental groups and actions of semisimple Lie groups. Topology. 40(4). 851–869. 9 indexed citations
7.
Zimmer, Robert J.. (1994). Discrete Groups and Non-Riemannian Homogeneous Spaces. Journal of the American Mathematical Society. 7(1). 159–159. 1 indexed citations
8.
Spatzier, Ralf & Robert J. Zimmer. (1991). Fundamental groups of negatively curved manifolds and actions of semisimple groups. Topology. 30(4). 591–601. 23 indexed citations
9.
Zimmer, Robert J.. (1989). Representations of fundamental groups of manifolds with a semisimple transformation group. Journal of the American Mathematical Society. 2(2). 201–213. 22 indexed citations
10.
Zimmer, Robert J.. (1989). Representations of Fundamental Groups of Manifolds with a Semisimple Transformation Group. Journal of the American Mathematical Society. 2(2). 201–201. 4 indexed citations
11.
Lubotzky, Alexander & Robert J. Zimmer. (1989). Variants of Kazhdan’s property for subgroups of semisimple groups. Israel Journal of Mathematics. 66(1-3). 289–299. 28 indexed citations
12.
Zimmer, Robert J.. (1987). Amenable actions and dense subgroups of Lie groups. Journal of Functional Analysis. 72(1). 58–64. 12 indexed citations
13.
Zimmer, Robert J.. (1982). Ergodic theory, group representations, and rigidity. Bulletin of the American Mathematical Society. 6(3). 383–417. 18 indexed citations
14.
Zimmer, Robert J.. (1981). An algebraic group associated to an ergodic diffeomorphism. Compositio Mathematica. 43(1). 59–69. 5 indexed citations
15.
Zimmer, Robert J., et al.. (1981). A Contingency Approach to Specializing an Industrial Sales Force. Journal of Personal Selling and Sales Management. 1(2). 27–35. 2 indexed citations
16.
Zimmer, Robert J.. (1978). Amenable Pairs of Groups and Ergodic Actions and the Associated von Neumann Algebras. Transactions of the American Mathematical Society. 243. 271–271. 1 indexed citations
17.
Zimmer, Robert J.. (1978). Amenable ergodic group actions and an application to Poisson boundaries of random walks. Journal of Functional Analysis. 27(3). 350–372. 117 indexed citations
18.
Zimmer, Robert J.. (1977). Normal ergodic actions. Journal of Functional Analysis. 25(3). 286–305. 7 indexed citations
19.
Zimmer, Robert J.. (1977). Hyperfinite factors and amenable ergodic actions. Inventiones mathematicae. 41(1). 23–31. 55 indexed citations
20.
Zimmer, Robert J.. (1976). Compact nilmanifold extensions of ergodic actions. Transactions of the American Mathematical Society. 223(0). 397–406. 6 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.

Explore authors with similar magnitude of impact

Breakdown of academic impact, for papers by M. S. Raghunathan Breakdown of academic impact, for papers by S. J. Patterson Breakdown of academic impact, for papers by Mark Mahowald Breakdown of academic impact, for papers by Pierre de la Harpe Breakdown of academic impact, for papers by Roger Godement Breakdown of academic impact, for papers by J. M. G. Fell Breakdown of academic impact, for papers by Benson Farb Breakdown of academic impact, for papers by Henri Gillet Breakdown of academic impact, for papers by Ichirō Satake Breakdown of academic impact, for papers by Yves Benoist
Rankless by CCL
2026