Coercive subtyping in lambda-free logical frameworks
Paper in proceeding, 2009

We show how coercive subtyping may be added to a lambda-free logical framework, by constructing the logical framework TF<, an extension of the lambda-free logical framework TF with coercive subtyping. Instead of coercive application, TF< makes use of a typecasting operation. We develop the metatheory of the resulting framework, including providing some general conditions under which typecasting in an object theory with coercive subtyping is decidable. We show how TF< may be embedded in the logical framework LF, and hence how results about LF may be deduced from results about TF< .

Type theory



Coercive subtyping

Lambda-free logical framework


Robin Adams

Chalmers, Computer Science and Engineering (Chalmers), Computing Science (Chalmers)

978-1-60558-529-1 (ISBN)

Fourth International Workshop on Logical Frameworks and Meta-Languages: Theory and Practice, LFMTP 09
Montreal, Canada,

Subject Categories

Algebra and Logic

Computer Science

Areas of Advance

Information and Communication Technology


Basic sciences



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