Greg Hjorth

1.4k total citations
59 papers, 620 citations indexed

About

Greg Hjorth is a scholar working on Geometry and Topology, Mathematical Physics and Computational Theory and Mathematics. According to data from OpenAlex, Greg Hjorth has authored 59 papers receiving a total of 620 indexed citations (citations by other indexed papers that have themselves been cited), including 49 papers in Geometry and Topology, 32 papers in Mathematical Physics and 32 papers in Computational Theory and Mathematics. Recurrent topics in Greg Hjorth's work include Advanced Topology and Set Theory (46 papers), Computability, Logic, AI Algorithms (29 papers) and Mathematical Dynamics and Fractals (10 papers). Greg Hjorth is often cited by papers focused on Advanced Topology and Set Theory (46 papers), Computability, Logic, AI Algorithms (29 papers) and Mathematical Dynamics and Fractals (10 papers). Greg Hjorth collaborates with scholars based in United States, Australia and New Zealand. Greg Hjorth's co-authors include Alexander S. Kechris, André Nies, Alain Louveau, Randall Dougherty, Simon Thomas, Jörg Brendle, Antonio Montalbán, Sławomir Solecki, Bakh Khoussainov and Kai Hauser and has published in prestigious journals such as Transactions of the American Mathematical Society, Proceedings of the American Mathematical Society and Journal of the American Mathematical Society.

In The Last Decade

Greg Hjorth

57 papers receiving 563 citations

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
Greg Hjorth United States	13	539	399	325	95	47	59	620
Franklin D. Tall Canada	14	553 1.0×	330 0.8×	309 1.0×	248 2.6×	31 0.7×	70	636
Mirna Džamonja United Kingdom	11	276 0.5×	191 0.5×	160 0.5×	53 0.6×	21 0.4×	59	322
Martin Goldstern Austria	10	252 0.5×	107 0.3×	234 0.7×	70 0.7×	28 0.6×	43	319
Peter Nyikos United States	13	482 0.9×	318 0.8×	222 0.7×	228 2.4×	46 1.0×	73	561
Jörg Brendle Japan	13	381 0.7×	183 0.5×	264 0.8×	145 1.5×	10 0.2×	57	409
Bohuslav Balcar Czechia	11	321 0.6×	179 0.4×	203 0.6×	148 1.6×	17 0.4×	40	396
J. B. Wagoner United States	13	289 0.5×	395 1.0×	167 0.5×	149 1.6×	42 0.9×	35	491
Moti Gitik Israel	14	607 1.1×	373 0.9×	453 1.4×	181 1.9×	16 0.3×	73	647
Matthew Foreman United States	15	662 1.2×	434 1.1×	499 1.5×	149 1.6×	13 0.3×	51	733
Alan H. Mekler Canada	12	291 0.5×	135 0.3×	250 0.8×	124 1.3×	25 0.5×	54	403

Countries citing papers authored by Greg Hjorth

Since Specialization

Citations

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

Fields of papers citing papers by Greg Hjorth

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Greg Hjorth

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

Hjorth, Greg. (2008). Selection theorems and treeability. Proceedings of the American Mathematical Society. 136(10). 3647–3653. 8 indexed citations

Hjorth, Greg. (2006). A lemma for cost attained. Annals of Pure and Applied Logic. 143(1-3). 87–102. 14 indexed citations

Hjorth, Greg. (2006). The Furstenberg lemma characterizes amenability. Proceedings of the American Mathematical Society. 134(10). 3061–3069. 1 indexed citations

Hjorth, Greg, et al.. (2005). Free continuous actions on zero-dimensional spaces. Topology and its Applications. 153(7). 1116–1131. 8 indexed citations

Hjorth, Greg & Alexander S. Kechris. (2005). Rigidity theorems for actions of product groups and countable Borel equivalence relations. Memoirs of the American Mathematical Society. 177(833). 0–0. 37 indexed citations

Hjorth, Greg. (2002). Cardinalities in the projective hierarchy. Journal of Symbolic Logic. 67(4). 1351–1372. 1 indexed citations

Hjorth, Greg. (2002). The isomorphism relation on countable torsion free abelian groups. Fundamenta Mathematicae. 175(3). 241–257. 22 indexed citations

Hjorth, Greg. (2001). A boundedness lemma for iterations. Journal of Symbolic Logic. 66(3). 1058–1072. 1 indexed citations

Hjorth, Greg. (2000). Actions by the classical Banach spaces. Journal of Symbolic Logic. 65(1). 392–420. 16 indexed citations

10.

Hjorth, Greg & Alexander S. Kechris. (2000). The complexity of the classification of Riemann surfaces and complex manifolds. Illinois Journal of Mathematics. 44(1). 3 indexed citations

11.

Hjorth, Greg. (1999). Classification and Orbit Equivalence Relations. Mathematical surveys and monographs. 107 indexed citations

12.

Hjorth, Greg, Alexander S. Kechris, & Alain Louveau. (1998). Borel equivalence relations induced by actions of the symmetric group. Annals of Pure and Applied Logic. 92(1). 63–112. 27 indexed citations

13.

Hjorth, Greg. (1998). Cameron's Cofinitary Group Conjecture. Journal of Algebra. 200(2). 439–448. 3 indexed citations

14.

Hjorth, Greg & Alexander S. Kechris. (1997). New Dichotomies for Borel Equivalence Relations. Bulletin of Symbolic Logic. 3(3). 329–346. 25 indexed citations

15.

Hauser, Kai & Greg Hjorth. (1997). Strong cardinals in the core model. Annals of Pure and Applied Logic. 83(2). 165–198. 6 indexed citations

16.

Hjorth, Greg. (1996). Two Applications of Inner Model Theory to the Study of Sets. Bulletin of Symbolic Logic. 2(1). 94–107. 3 indexed citations

17.

Hjorth, Greg & Alexander S. Kechris. (1996). Borel equivalence relations and classifications of countable models. Annals of Pure and Applied Logic. 82(3). 221–272. 52 indexed citations

18.

Hjorth, Greg. (1995). A dichotomy for the definable universe. Journal of Symbolic Logic. 60(4). 1199–1207. 12 indexed citations

19.

Brendle, Jörg, et al.. (1995). Regularity properties for dominating projective sets. Annals of Pure and Applied Logic. 72(3). 291–307. 12 indexed citations

20.

Hjorth, Greg. (1994). Π 1 1 Wellfounded Relations.. Notre Dame Journal of Formal Logic. 35. 542–549. 1 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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