*To*: cl-isabelle-users at lists.cam.ac.uk, Lars Noschinski <noschinl at in.tum.de>*Subject*: Re: [isabelle] Simpler theorem statements, and proofs for them [Re: Started auction theory toolbox; announcement, next steps, and questions]*From*: Florian Haftmann <florian.haftmann at informatik.tu-muenchen.de>*Date*: Thu, 22 Nov 2012 18:41:05 +0100*In-reply-to*: <50AE5C0F.3080802@in.tum.de>*Organization*: TU Munich*References*: <50916DB3.4030707@cs.bham.ac.uk> <B342CF2B-EEC3-4932-A98D-193702F57A14@cam.ac.uk> <5091CE53.6020006@cs.bham.ac.uk> <C76381F2-5127-48DF-B198-DE2B3AABEAB1@cam.ac.uk> <50AE3314.8060002@cs.bham.ac.uk> <alpine.LNX.2.00.1211221732160.24280@macbroy21.informatik.tu-muenchen.de> <50AE5C0F.3080802@in.tum.de>*User-agent*: Mozilla/5.0 (X11; Linux i686; rv:17.0) Gecko/17.0 Thunderbird/17.0

>> (In contrast HOL --> and ! are old-fashioned/cumbersome, where Pure >> ==> and !! would do the job better.) > > Is there actually a drawback when using == instead of = or is it a mere > matter of style? I like using Pure equality because it saves me a level > of parentheses when I have a binder on the right hand side. It is simpler: a) Uniformity definition foo :: … where "foo … = …" vs. primrec foo :: … where "foo … = …" | … | "foo … = …" vs. fun(ction) foo :: … where "foo … = …" | … | "foo … = …" b) Less symbols Why care about »foo« anyway? Florian -- PGP available: http://home.informatik.tu-muenchen.de/haftmann/pgp/florian_haftmann_at_informatik_tu_muenchen_de

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**References**:**[isabelle] Simpler theorem statements, and proofs for them [Re: Started auction theory toolbox; announcement, next steps, and questions]***From:*Christoph LANGE

**Re: [isabelle] Simpler theorem statements, and proofs for them [Re: Started auction theory toolbox; announcement, next steps, and questions]***From:*Lawrence Paulson

**Re: [isabelle] Simpler theorem statements, and proofs for them [Re: Started auction theory toolbox; announcement, next steps, and questions]***From:*Christoph LANGE

**Re: [isabelle] Simpler theorem statements, and proofs for them [Re: Started auction theory toolbox; announcement, next steps, and questions]***From:*Makarius

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