Peter Johnstone

3.6k total citations
76 papers, 1.5k citations indexed

About

Peter Johnstone is a scholar working on Geometry and Topology, Computational Theory and Mathematics and Mathematical Physics. According to data from OpenAlex, Peter Johnstone has authored 76 papers receiving a total of 1.5k indexed citations (citations by other indexed papers that have themselves been cited), including 33 papers in Geometry and Topology, 29 papers in Computational Theory and Mathematics and 26 papers in Mathematical Physics. Recurrent topics in Peter Johnstone's work include Homotopy and Cohomology in Algebraic Topology (25 papers), Advanced Topology and Set Theory (20 papers) and Advanced Algebra and Logic (17 papers). Peter Johnstone is often cited by papers focused on Homotopy and Cohomology in Algebraic Topology (25 papers), Advanced Topology and Set Theory (20 papers) and Advanced Algebra and Logic (17 papers). Peter Johnstone collaborates with scholars based in United Kingdom, United States and Canada. Peter Johnstone's co-authors include A. Carboni, J. M. E. Hyland, Andrew M. Pitts, André Joyal, Ieke Moerdijk, Arūnas Juška, Richard Pozzuto, John Power, Richard J. Wood and Robert Paré and has published in prestigious journals such as Fuzzy Sets and Systems, Lecture notes in mathematics and Theoretical Computer Science.

In The Last Decade

Peter Johnstone

71 papers receiving 1.2k citations

Peers

Peter Johnstone

MP

CTM

GT

AI

ANT

F. William Lawvere United States

J. Lambek Canada

H. Jerome Keisler United States

Fred Richman United States

Joachim Lambek Canada

Bernhard Banaschewski Canada

Achim Jung United Kingdom

Douglas Bridges New Zealand

Anders Kock Denmark

D. S. Passman United States

F. William Lawvere United States

Peter Johnstone

572 ×0.8

MP

710 ×1.1

CTM

481 ×0.8

GT

601 ×1.0

AI

267 ×0.7

ANT

Citations per year, relative to Peter Johnstone Peter Johnstone (= 1×) peers F. William Lawvere

Countries citing papers authored by Peter Johnstone

Since Specialization

Citations

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

Fields of papers citing papers by Peter Johnstone

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Peter Johnstone

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

1.

Johnstone, Peter. (2017). Functoriality of modified realizability. Tbilisi Mathematical Journal. 10(3). 1 indexed citations

2.

Borceux, Francis, Dominique Bourn, & Peter Johnstone. (2006). Initial normal covers in bi-Heyting toposes. Archivum Mathematicum. 42(4). 335–356. 4 indexed citations

3.

Johnstone, Peter. (2005). Complemented sublocales and open maps. Annals of Pure and Applied Logic. 137(1-3). 240–255. 3 indexed citations

4.

Johnstone, Peter, et al.. (2001). On the structure of categories of coalgebras. Theoretical Computer Science. 260(1-2). 87–117. 29 indexed citations

5.

Johnstone, Peter, et al.. (1998). Classifying toposes for first-order theories. Annals of Pure and Applied Logic. 91(1). 33–58. 10 indexed citations

6.

Johnstone, Peter. (1997). Cartesian monads on toposes. Journal of Pure and Applied Algebra. 116(1-3). 199–220. 9 indexed citations

7.

Johnstone, Peter, et al.. (1997). Classifying Toposes for First Order Theories. BRICS Report Series. 4(20). 1 indexed citations

8.

Johnstone, Peter. (1994). Variations on the bagdomain theme. Theoretical Computer Science. 136(1). 3–20. 5 indexed citations

9.

Jibladze, Mamuka & Peter Johnstone. (1991). The frame of fibrewise closed nuclei. French digital mathematics library (Numdam). 32(2). 99–112. 3 indexed citations

10.

Johnstone, Peter. (1991). The ‘closed subgroup theorem’ for localic herds and pregroupoids. Journal of Pure and Applied Algebra. 70(1-2). 97–106. 16 indexed citations

11.

Johnstone, Peter. (1989). A constructive “Closed subgroup theorem” for localic groups and groupoids. French digital mathematics library (Numdam). 30(1). 3–23. 14 indexed citations

12.

Johnstone, Peter. (1989). A topos-theorist looks at dilators. Journal of Pure and Applied Algebra. 58(3). 235–249. 3 indexed citations

13.

Johnstone, Peter. (1989). Affine categories and naturally Mal'cev categories. Journal of Pure and Applied Algebra. 61(3). 251–256. 37 indexed citations

14.

Johnstone, Peter. (1988). A simple proof that localic subgroups are closed. French digital mathematics library (Numdam). 29(2). 157–161. 2 indexed citations

15.

Johnstone, Peter & André Joyal. (1982). Continuous categories and exponentiable toposes. Journal of Pure and Applied Algebra. 25(3). 255–296. 32 indexed citations

16.

Johnstone, Peter. (1981). The gleason cover of a topos, II. Journal of Pure and Applied Algebra. 22(3). 229–247. 18 indexed citations

17.

Hyland, J. M. E., Peter Johnstone, & Andrew M. Pitts. (1980). Tripos theory. Mathematical Proceedings of the Cambridge Philosophical Society. 88(2). 205–232. 59 indexed citations

18.

Johnstone, Peter. (1979). On a Topological Topos. Proceedings of the London Mathematical Society. s3-38(2). 237–271. 37 indexed citations

19.

Johnstone, Peter, et al.. (1978). Indexed Categories and Their Applications. Lecture notes in mathematics. 38 indexed citations

20.

Johnstone, Peter. (1974). The associated sheaf functor in an elementary topos. Journal of Pure and Applied Algebra. 4(2). 231–242. 3 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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