This Element is an exposition of second- and higher-order logic and type theory. It begins with a presentation of the syntax and semantics of classical second-order logic, pointing up the contrasts with first-order logic. This leads to a discussion of higher-order logic based on the concept of a type. The second Section contains an account of the origins and nature of type theory, and its relationship to set theory. Section 3 introduces Local Set Theory (also known as higher-order intuitionistic logic), an important form of type theory based on intuitionistic logic. In Section 4 number of contemporary forms of type theory are described, all of which are based on the so-called 'doctrine of propositions as types'. We conclude with an Appendix in which the semantics for Local Set Theory - based on category theory - is outlined.
By:
John L. Bell (University of Western Ontario) Imprint: Cambridge University Press Country of Publication: United Kingdom Edition: New edition Dimensions:
Height: 228mm,
Width: 152mm,
Spine: 5mm
Weight: 140g ISBN:9781108986908 ISBN 10: 1108986900 Series:Elements in Philosophy and Logic Pages: 75 Publication Date:31 March 2022 Audience:
General/trade
,
ELT Advanced
Format:Paperback Publisher's Status: Active
1. Second- Order Logic and Higher-Order Logic; 2. Type Theory and its Origins; 3. Local set theory; 4. Newer Forms of Type Theory Based on the Doctrine of 'Propositions as Types'; Appendix; The Semantics of Local Set Theory/Intuitionistic Higher-Order Logic.