J. A. Gerhard

463 total citations
20 papers, 332 citations indexed

About

J. A. Gerhard is a scholar working on Computational Theory and Mathematics, Management Science and Operations Research and Artificial Intelligence. According to data from OpenAlex, J. A. Gerhard has authored 20 papers receiving a total of 332 indexed citations (citations by other indexed papers that have themselves been cited), including 20 papers in Computational Theory and Mathematics, 9 papers in Management Science and Operations Research and 6 papers in Artificial Intelligence. Recurrent topics in J. A. Gerhard's work include semigroups and automata theory (17 papers), Advanced Algebra and Logic (15 papers) and Fuzzy and Soft Set Theory (9 papers). J. A. Gerhard is often cited by papers focused on semigroups and automata theory (17 papers), Advanced Algebra and Logic (15 papers) and Fuzzy and Soft Set Theory (9 papers). J. A. Gerhard collaborates with scholars based in Canada. J. A. Gerhard's co-authors include Mario Petrich and has published in prestigious journals such as Theoretical Computer Science, Pacific Journal of Mathematics and Journal of Algebra.

In The Last Decade

J. A. Gerhard

20 papers receiving 248 citations

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
J. A. Gerhard Canada	9	291	128	54	41	34	20	332
E. Fried Hungary	10	240 0.8×	74 0.6×	103 1.9×	65 1.6×	69 2.0×	31	332
H. E. Scheiblich United States	10	360 1.2×	160 1.3×	25 0.5×	34 0.8×	112 3.3×	18	382
Marlow Anderson United States	8	144 0.5×	48 0.4×	87 1.6×	58 1.4×	73 2.1×	21	229
Alexander Abian United States	8	108 0.4×	29 0.2×	125 2.3×	19 0.5×	97 2.9×	70	254
Domenico Freni Italy	9	169 0.6×	235 1.8×	177 3.3×	29 0.7×	57 1.7×	32	330
William H. Cornish Australia	11	366 1.3×	178 1.4×	193 3.6×	81 2.0×	75 2.2×	34	438
Sydney Bulman‐Fleming Canada	12	404 1.4×	82 0.6×	143 2.6×	105 2.6×	116 3.4×	48	443
Todd Feil United States	7	125 0.4×	41 0.3×	66 1.2×	53 1.3×	60 1.8×	13	199
Samuel Wolfenstein France	4	217 0.7×	68 0.5×	228 4.2×	36 0.9×	154 4.5×	7	403
Igor Dolinka Serbia	11	277 1.0×	63 0.5×	67 1.2×	50 1.2×	130 3.8×	61	312

Countries citing papers authored by J. A. Gerhard

Since Specialization

Citations

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

Fields of papers citing papers by J. A. Gerhard

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of J. A. Gerhard

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

All Works

Sort: Min cites: Since: Top N: Style:

20 of 20 papers shown

Gerhard, J. A. & Mario Petrich. (1994). Unification in free distributive lattices. Theoretical Computer Science. 126(2). 237–257. 1 indexed citations

Gerhard, J. A. & Mario Petrich. (1989). The Malcev product of quasivarieties of normal bands. Archiv der Mathematik. 52(2). 140–148. 1 indexed citations

Gerhard, J. A. & Mario Petrich. (1989). Varieties of Bands Revisited. Proceedings of the London Mathematical Society. s3-58(2). 323–350. 44 indexed citations

Gerhard, J. A. & Mario Petrich. (1988). Certain characterizations of varieties of bands. Proceedings of the Edinburgh Mathematical Society. 31(2). 301–319. 5 indexed citations

Gerhard, J. A. & Mario Petrich. (1986). Free bands and free *-bands. Glasgow Mathematical Journal. 28(2). 161–179. 9 indexed citations

Gerhard, J. A. & Mario Petrich. (1985). All varieties of regular orthogroups. Semigroup Forum. 31(1). 311–351. 14 indexed citations

Gerhard, J. A. & Mario Petrich. (1985). Free Involutorial Completely Simple Semigroups. Canadian Journal of Mathematics. 37(2). 271–295. 2 indexed citations

Gerhard, J. A.. (1983). Free completely regular semigroups I. Representation. Journal of Algebra. 82(1). 135–142. 8 indexed citations

Gerhard, J. A.. (1983). Free completely regular semigroups II. Word problem. Journal of Algebra. 82(1). 143–156. 5 indexed citations

10.

Gerhard, J. A. & Mario Petrich. (1983). Word problems for free objects in certain varieties of completely regular semigroups. Pacific Journal of Mathematics. 104(2). 351–359. 25 indexed citations

11.

Gerhard, J. A. & Mario Petrich. (1981). The Word Problem for Orthogroups. Canadian Journal of Mathematics. 33(4). 893–900. 8 indexed citations

12.

Gerhard, J. A.. (1978). The word problem for semigroups satisfying x³ = x. Mathematical Proceedings of the Cambridge Philosophical Society. 84(1). 11–19. 5 indexed citations

13.

Gerhard, J. A.. (1977). Semigroups with an idempotent power II the lattice of equational subclasses of [(xy)2 = xy]. Semigroup Forum. 14(1). 375–388. 6 indexed citations

14.

Gerhard, J. A.. (1977). Semigroups with an idempotent power I word problems. Semigroup Forum. 14(1). 137–141. 2 indexed citations

15.

Gerhard, J. A.. (1974). Injectives in equational classes of idempotent semigroups. Semigroup Forum. 9(1). 36–53. 6 indexed citations

16.

Gerhard, J. A.. (1972). Some subdirectly irreducible idempotent semigroups. Semigroup Forum. 5(1). 362–369. 5 indexed citations

17.

Gerhard, J. A.. (1971). The number of polynomials of idempotent semigroups. Journal of Algebra. 18(3). 366–376. 7 indexed citations

18.

Gerhard, J. A., et al.. (1971). Semivarieties of Idempotent Semigroups. Proceedings of the London Mathematical Society. s3-22(4). 667–680. 12 indexed citations

19.

Gerhard, J. A.. (1971). Subdirectly irreducible idempotent semigroups. Pacific Journal of Mathematics. 39(3). 669–676. 52 indexed citations

20.

Gerhard, J. A.. (1970). The lattice of equational classes of idempotent semigroups. Journal of Algebra. 15(2). 195–224. 115 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