*To*: Gottfried Barrow <gottfried.barrow at gmx.com>*Subject*: Re: [isabelle] How do I write the sequent |- P in Isar using theorem*From*: Makarius <makarius at sketis.net>*Date*: Mon, 1 Jul 2013 21:54:51 +0200 (CEST)*Cc*: cl-isabelle-users at lists.cam.ac.uk*In-reply-to*: <51CF3A8E.7000805@gmx.com>*References*: <51CE8C40.6020808@gmx.com> <51CF3A8E.7000805@gmx.com>*User-agent*: Alpine 2.00 (LNX 1167 2008-08-23)

On Sat, 29 Jun 2013, Gottfried Barrow wrote:

There's a 3 page section in isar-ref.pdf titled "The sequent caclulus", page201, which I guess will help me eventually figure it out.It says, For certain proofs in classical logic, it can not be called natural. The sequent calculus, a generalization of natural deduction, is easier to automate.

Makarius

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