From: Phil Clayton <phil.clayton@lineone.net>
Subject: Re: SPARK
Date: Sat, 15 May 2010 11:43:05 -0700 (PDT)
Date: 2010-05-15T11:43:05-07:00 [thread overview]
Message-ID: <cb9febe9-f623-42bf-9c24-225191f32355@c11g2000vbe.googlegroups.com> (raw)
In-Reply-To: op.vcq9yrdhule2fv@garhos
On May 15, 5:41 pm, Yannick Duchêne (Hibou57)
<yannick_duch...@yahoo.fr> wrote:
>
> --# assert ((Part * 100) <= (Whole * 100)) ->
> --# (((Part * 100) / Whole) <= ((Whole * 100) / Whole));
>
> It was not able to prove it. Do I miss something or does it simply means
> the simplifier does not know about a rule which seems basic to me, that is
> (A <= B) -> ((A / C) <= (B / C)) ? ... which is still valid for integer
> arithmetic.
This isn't valid for all values of A, B and C: consider C = -1. It
would be sufficient to know 0 < C, so perhaps sufficient information
needs to be propagated to show 0 < Whole ?
Phil C.
next prev parent reply other threads:[~2010-05-15 18:43 UTC|newest]
Thread overview: 61+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-05-12 22:55 SPARK Yannick Duchêne (Hibou57)
2010-05-13 0:52 ` SPARK Yannick Duchêne (Hibou57)
2010-05-13 3:06 ` SPARK Yannick Duchêne (Hibou57)
2010-05-13 9:28 ` SPARK stefan-lucks
2010-05-13 16:48 ` SPARK Yannick Duchêne (Hibou57)
2010-05-15 13:09 ` SPARK Peter C. Chapin
2010-05-14 22:55 ` SPARK Yannick Duchêne (Hibou57)
2010-05-13 4:00 ` SPARK Yannick Duchêne (Hibou57)
2010-05-13 16:54 ` SPARK Yannick Duchêne (Hibou57)
2010-05-13 17:15 ` SPARK Rod Chapman
2010-05-13 19:43 ` SPARK Yannick Duchêne (Hibou57)
2010-05-13 20:05 ` SPARK Rod Chapman
2010-05-13 21:43 ` SPARK Yannick Duchêne (Hibou57)
2010-05-14 14:47 ` SPARK Yannick Duchêne (Hibou57)
2010-05-14 1:20 ` SPARK Yannick Duchêne (Hibou57)
2010-05-14 4:15 ` SPARK Yannick Duchêne (Hibou57)
2010-05-14 8:17 ` SPARK Phil Thornley
2010-05-14 9:32 ` SPARK Rod Chapman
2010-05-14 14:20 ` SPARK Yannick Duchêne (Hibou57)
2010-05-14 3:07 ` SPARK Yannick Duchêne (Hibou57)
2010-05-14 3:26 ` SPARK Yannick Duchêne (Hibou57)
2010-05-14 8:11 ` SPARK Phil Thornley
2010-05-14 14:28 ` SPARK Yannick Duchêne (Hibou57)
2010-05-14 21:45 ` SPARK Yannick Duchêne (Hibou57)
2010-05-15 16:41 ` SPARK Yannick Duchêne (Hibou57)
2010-05-15 18:00 ` SPARK Yannick Duchêne (Hibou57)
2010-05-15 18:14 ` SPARK Yannick Duchêne (Hibou57)
2010-05-15 19:08 ` SPARK Yannick Duchêne (Hibou57)
2010-05-15 20:23 ` SPARK Yannick Duchêne (Hibou57)
2010-05-16 18:13 ` SPARK Peter C. Chapin
2010-05-17 0:59 ` SPARK Yannick Duchêne (Hibou57)
2010-05-16 18:17 ` SPARK Phil Thornley
2010-05-17 1:24 ` SPARK Yannick Duchêne (Hibou57)
2010-05-15 18:43 ` Phil Clayton [this message]
2010-05-15 19:12 ` SPARK Yannick Duchêne (Hibou57)
2010-05-15 21:02 ` SPARK Phil Clayton
2010-05-15 22:48 ` SPARK Yannick Duchêne (Hibou57)
2010-05-16 1:48 ` SPARK Yannick Duchêne (Hibou57)
2010-05-16 1:53 ` SPARK Yannick Duchêne (Hibou57)
2010-05-16 5:28 ` SPARK Yannick Duchêne (Hibou57)
2010-05-18 18:01 ` SPARK Yannick Duchêne (Hibou57)
2010-05-19 8:09 ` SPARK Phil Thornley
2010-05-19 20:38 ` SPARK Simon Wright
2010-05-19 21:27 ` SPARK Yannick Duchêne (Hibou57)
2010-05-20 6:21 ` SPARK Simon Wright
2010-05-20 6:58 ` SPARK Yannick Duchêne (Hibou57)
2010-05-20 21:51 ` SPARK Simon Wright
2010-05-19 21:35 ` SPARK Yannick Duchêne (Hibou57)
-- strict thread matches above, loose matches on Subject: below --
2009-06-10 9:47 SPARK Robert Matthews
2004-08-18 23:46 timeouts Brian May
2004-08-19 3:40 ` timeouts Steve
2004-08-22 4:18 ` timeouts Brian May
2004-08-22 12:54 ` timeouts Jeff C,
2004-08-26 1:28 ` timeouts Brian May
2004-08-26 13:34 ` timeouts Steve
2004-08-26 14:02 ` timeouts Georg Bauhaus
2004-08-26 23:03 ` SPARK Brian May
2004-08-27 10:11 ` SPARK Georg Bauhaus
2001-08-08 9:46 SPARK Soeren.Henssel-Rasmussen
2001-08-08 20:04 ` SPARK McDoobie
2001-08-06 16:49 SPARK programmer
2001-08-07 7:04 ` SPARK Hambut
2001-08-07 7:18 ` SPARK Hambut
2001-08-07 8:37 ` SPARK Peter Amey
2001-08-07 14:42 ` SPARK McDoobie
2001-08-09 12:36 ` SPARK Peter Amey
2001-08-14 3:14 ` SPARK Prof Karl Kleine
2001-08-14 10:25 ` SPARK Rod Chapman
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