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Faculty of Mathematics

 

Professor of Foundations of Mathematics

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

Publications

Factorization theorems for geometric morphisms. I
PT Johnstone
– Cahiers de Topologie et Géométrie Différentielle
(1981)
22,
3
Open maps of toposes
PT JOHNSTONE
– manuscripta mathematica
(1980)
31,
217
THE GLEASON COVER OF A TOPOS .1.
PT JOHNSTONE
– Journal of Pure and Applied Algebra
(1980)
19,
171
Automorphisms of $Ømega $
PT Johnstone
– Algebra Universalis
(1979)
9,
1
ON A TOPOLOGICAL TOPOS
PT JOHNSTONE
– PROCEEDINGS OF THE LONDON MATHEMATICAL SOCIETY
(1979)
38,
237
Conditions related to De Morgan’s law
PT Johnstone
(1979)
753,
479
Formally real local rings, and infinitesimal stability
A Kock
(1979)
30,
123
A syntactic approach to Diers’ localizable categories
PT Johnstone
(1979)
753,
466
Injectives in topoi. II. Connections with the axiom of choice
PT Johnstone, FEJ Linton, R Paré
(1979)
719,
207
Algebraic theories in toposes
PT Johnstone, GC Wraith
(1978)
661,
141
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Room

C0.01

Telephone

01223 337985