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Department of Pure Mathematics and Mathematical Statistics

Professor of Foundations of Mathematics

Research Interests: Category theory, in particular topos theory and connections with logic

Publications

A remark on: “Wallman compactification of locales” [Houston J. Math. \bf 10 (1984), no. 2, 201–206; MR744904] by P. T. Johnstone
XR Sun, W He
– Journal of Mathematical Research and Exposition
(2008)
28,
605
Another condition equivalent to de morgan's law
PT JOHNSTONE
– Communications in Algebra
(2007)
7,
1309
Quasitoposes, quasiadhesive categories and artin glueing
PT Johnstone, S Lack, P Sobocinski
– ALGEBRA AND COALGEBRA IN COMPUTER SCIENCE, PROCEEDINGS
(2007)
4624,
312
Preframe presentations present
P JOHNSTONE, S VICKERS
– LECTURE NOTES IN MATHEMATICS
(2006)
1488,
193
Initial normal covers in bi-Heyting toposes
PT Johnstone, F Borceux, D Bourn
– Arch. Math. (Brno)
(2006)
42,
335
Complemented sublocales and open maps
PT Johnstone
– Annals of Pure and Applied Logic
(2006)
137,
240
On solubility of sublocales
PT Johnstone
– Topology Proceedings
(2005)
29,
527
Corrigenda for Connected limits, familial representability and Artin glueing
A Carboni, P Johnstone
– Mathematical Structures in Computer Science
(2004)
14,
185
A note on the semiabelian variety of Heyting semilattices
P Johnstone
(2004)
43,
317
Sketches of an elephant: A topos theory compendium, vols. 1-2
PT Johnstone
(2002)
43-44,
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Room

C1.07

Telephone

01223 337985