[Club2] Invitation: A Consistent Foundation for Isabelle/HOL @ Tue Aug 18, 2015 13:30 - 14:30 (Club2)

[julianbrunner at gmail.com]

You have been invited to the following event.

Title: A Consistent Foundation for Isabelle/HOL
Speaker: Ondřej Kunčar
Type: ITP Rehearsal Talk
Abstract: The interactive theorem prover Isabelle/HOL is based on the well  
understood Higher-Order Logic (HOL), which is widely believed to be  
consistent (and provably consistent in set theory by a standard semantic  
argument). However, Isabelle/HOL brings its own personal touch to HOL:  
overloaded constant definitions, used to achieve Haskell-like type classes  
in the user space. These features are a delight for the users, but  
unfortunately are not easy to get right as an extension of HOL—they have a  
history of inconsistent behavior. It has been an open question under which  
criteria overloaded constant definitions and type definitions can be  
combined together while still guaranteeing consistency. This talk presents  
a solution to this problem: non-overlapping definitions and termination of  
the definition-dependency relation (tracked not only through constants but  
also through types) ensures relative consistency of Isabelle/HOL.
When: Tue Aug 18, 2015 13:30 – 14:30 Berlin
Where: MI 00.09.038 (Turing)
Calendar: Club2
Who:
     * julianbrunner at gmail.com - creator
     * club2 at mailbroy.informatik.tu-muenchen.de

Event details:  
https://www.google.com/calendar/event?action=VIEW&eid=OWU0YjQyY2tsa2J1ZmtrNW9sbWdsNGVndmMgY2x1YjJAbWFpbGJyb3kuaW5mb3JtYXRpay50dS1tdWVuY2hlbi5kZQ&tok=NTIjc2U2ZWJlM3RvZmY0Y2g1bm11bmlibTVtOThAZ3JvdXAuY2FsZW5kYXIuZ29vZ2xlLmNvbWU0MmY3NGExZjIzMDNmMzcxN2I4YTFlM2M1MWM3MmZjMDg2ZjA1Njc&ctz=Europe/Berlin&hl=en

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