[Club2] Invitation: Nonprimitive Corecursion in Isabelle/HOL @ Thu Jul 16, 2015 14:00 - 15:00 (Club2)

[julianbrunner at gmail.com]

You have been invited to the following event.

Title: Nonprimitive Corecursion in Isabelle/HOL
Speaker: Aymeric Bouzy

Abstract:
Codatatypes can be used to model possibly infinite data. They have been  
introduced in Isabelle/HOL in 2013. Since 2014, there has been a  
"primcorec" command as well, for defining primitively corecursive  
functions. We implement a foundational framework for corecursion  
support, "corec", that offers a lot more syntactic flexibility. In  
particular, it allows corecursion under "friendly" operations. The  
command "corec" results in much shorter, more natural definitions: for  
example, the part of Traytel's "Coinductive_Languages" entry in the Archive  
of Formal Proofs that defines regular operations can be shrunk to 12% of  
its size, without the need to introduce intermediate constants, and without  
writing a single proof line.
When: Thu Jul 16, 2015 14:00 - 15:00 Berlin
Where: MI 00.09.038 (Turing)
Calendar: Club2
Who:
     * Julian Brunner - creator
     * club2 at mailbroy.informatik.tu-muenchen.de
     * Aymeric Bouzy

Event details:  
https://www.google.com/calendar/event?action=VIEW&eid=aDM5bjRzczY1MGt1cGptZWY2cThybHRkcWsgY2x1YjJAbWFpbGJyb3kuaW5mb3JtYXRpay50dS1tdWVuY2hlbi5kZQ&tok=NTIjc2U2ZWJlM3RvZmY0Y2g1bm11bmlibTVtOThAZ3JvdXAuY2FsZW5kYXIuZ29vZ2xlLmNvbTA3Zjk4MzVhODcwMThlYTg5M2JmZmExNWQxYjNkMDhjOTIxNTJiNzM&ctz=Europe/Berlin&hl=en

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