Joyce O’Halloran

407 total citations
19 papers, 250 citations indexed

About

Joyce O’Halloran is a scholar working on Algebra and Number Theory, Control and Systems Engineering and Geometry and Topology. According to data from OpenAlex, Joyce O’Halloran has authored 19 papers receiving a total of 250 indexed citations (citations by other indexed papers that have themselves been cited), including 9 papers in Algebra and Number Theory, 7 papers in Control and Systems Engineering and 6 papers in Geometry and Topology. Recurrent topics in Joyce O’Halloran's work include Advanced Topics in Algebra (7 papers), Stability and Control of Uncertain Systems (6 papers) and Finite Group Theory Research (5 papers). Joyce O’Halloran is often cited by papers focused on Advanced Topics in Algebra (7 papers), Stability and Control of Uncertain Systems (6 papers) and Finite Group Theory Research (5 papers). Joyce O’Halloran collaborates with scholars based in United States, Germany and Ireland. Joyce O’Halloran's co-authors include Fritz Grunewald, D. Hinrichsen and Alice Fialowski and has published in prestigious journals such as Systems & Control Letters, SIAM Journal on Control and Optimization and American Journal of Mathematics.

In The Last Decade

Joyce O’Halloran

17 papers receiving 232 citations

Peers

Joyce O’Halloran
П. А. Крылов Russia
Yu. P. Razmyslov Russia
H. F. Kreimer United States
James K. Deveney United States
Tavan T. Trent United States
Mark Wildon United Kingdom
Adil Yaqub United States
Lee Klingler United States
K. Varadarajan Canada
Paolo Zanardo Italy
П. А. Крылов Russia
Joyce O’Halloran
Citations per year, relative to Joyce O’Halloran Joyce O’Halloran (= 1×) peers П. А. Крылов

Countries citing papers authored by Joyce O’Halloran

Since Specialization
Citations

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

Fields of papers citing papers by Joyce O’Halloran

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Joyce O’Halloran. 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 Joyce O’Halloran. The network helps show where Joyce O’Halloran may publish in the future.

Co-authorship network of co-authors of Joyce O’Halloran

This figure shows the co-authorship network connecting the top 25 collaborators of Joyce O’Halloran. A scholar is included among the top collaborators of Joyce O’Halloran 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 Joyce O’Halloran. Joyce O’Halloran is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

19 of 19 papers shown
1.
O’Halloran, Joyce, et al.. (2019). Active Learning in Computer-based College Algebra. PRIMUS. 30(4). 458–474. 9 indexed citations
2.
Hinrichsen, D. & Joyce O’Halloran. (2003). On the orbit closure problem for matrix pencils and controllable singular systems. i and ii. 1324–1325.
3.
Hinrichsen, D. & Joyce O’Halloran. (2002). A note on the degeneration of systems under pencil equivalence. 1 and 2. 1431–1432.
4.
O’Halloran, Joyce, et al.. (2002). GROEBNER BASES FOR CONSTRUCTIBLE SETS. Communications in Algebra. 30(11). 5479–5483. 6 indexed citations
5.
Hinrichsen, D. & Joyce O’Halloran. (2002). Limits under high gain proportional (and derivative) feedback. 3. 2730–2734. 2 indexed citations
6.
Hinrichsen, D. & Joyce O’Halloran. (1997). Limits of generalized state space systems under proportional and derivative feedback. Mathematics of Control Signals and Systems. 10(2). 97–124. 4 indexed citations
7.
Hinrichsen, D. & Joyce O’Halloran. (1995). A pencil approach to high gain feedback and generalized state space systems. Kybernetika. 31(2). 109–139. 11 indexed citations
8.
Grunewald, Fritz & Joyce O’Halloran. (1993). Deformations of Lie Algebras. Journal of Algebra. 162(1). 210–224. 17 indexed citations
9.
Hinrichsen, D. & Joyce O’Halloran. (1992). Orbit closures of singular matrix pencils. Journal of Pure and Applied Algebra. 81(2). 117–137. 19 indexed citations
10.
Hinrichsen, D. & Joyce O’Halloran. (1990). A Complete Characterization of Orbit Closures of Controllable Singular Systems under Restricted System Equivalence. SIAM Journal on Control and Optimization. 28(3). 602–623. 13 indexed citations
11.
Hinrichsen, D. & Joyce O’Halloran. (1990). Orbit closures of matrix pencils and system limits under high gain feedback. 1 and 2. 55–60 vol.1. 4 indexed citations
12.
Fialowski, Alice & Joyce O’Halloran. (1990). A Comparison of Deformations and Orbit Closure. Communications in Algebra. 18(12). 4121–4140. 17 indexed citations
13.
Grunewald, Fritz & Joyce O’Halloran. (1988). Varieties of nilpotent Lie algebras of dimension less than six. Journal of Algebra. 112(2). 315–325. 82 indexed citations
14.
Grunewald, Fritz & Joyce O’Halloran. (1988). A characterization of orbit closure and applications. Journal of Algebra. 116(1). 163–175. 39 indexed citations
15.
O’Halloran, Joyce. (1987). A simple proof of the gerstenhaber-hesselink theorem for nilpotent matrices. Communications in Algebra. 15(10). 2017–2023. 2 indexed citations
16.
O’Halloran, Joyce. (1987). Feedback equivalence of constant linear systems. Systems & Control Letters. 8(3). 241–246. 10 indexed citations
17.
Grunewald, Fritz & Joyce O’Halloran. (1985). Nilpotent groups and unipotent algebraic groups. Journal of Pure and Applied Algebra. 37. 299–313. 5 indexed citations
18.
O’Halloran, Joyce. (1983). A vanishing theorem for the cohomology of borel subgroups. Communications in Algebra. 11(14). 1603–1606. 3 indexed citations
19.
O’Halloran, Joyce. (1981). Weyl Modules and the Cohomology of Chevalley Groups. American Journal of Mathematics. 103(2). 399–399. 7 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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