From: Dmitry A. Kazakov <mailbox@dmitry-kazakov.de>
Subject: Re: Interval arithmetic in Ada?
Date: Mon, 22 Apr 2002 14:04:28 +0200
Date: 2002-04-22T14:04:28+02:00 [thread overview]
Message-ID: <p7u7cugveo1vhmf89fbn08nkobjjckjl09@4ax.com> (raw)
In-Reply-To: mailman.1019467021.24710.comp.lang.ada@ada.eu.org
On Mon, 22 Apr 2002 11:13:10 +0200 (MET DST), "Grein, Christoph"
<christoph.grein@eurocopter.com> wrote:
>This was the Ada 83 floating point model.
Hmm. Interval arithmetic is defined on intervals of numbers as opposed
to single numbers. It goes approximately like this:
[a,b] + [c,d] = [a+c, b+d]
[a,b] * [c,d] = [min (ac, ad, bc, bd), max (ac, ad, bc, bd)]
...
Usually it is used for numeric computations with an automatic control
over calculation errors. It is also tightly related with the
possibility theory, fuzzy numbers etc. It is relatively
straightforward, but firstly I do not want to reinvent wheel and
secondly it requires precise control over rounding. I feel myself not
very confident with Annexes A.5 and G.
---
Regards,
Dmitry Kazakov
www.dmitry-kazakov.de
next prev parent reply other threads:[~2002-04-22 12:04 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-04-22 9:13 Interval arithmetic in Ada? Grein, Christoph
2002-04-22 12:04 ` Dmitry A. Kazakov [this message]
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2002-04-22 13:21 Grein, Christoph
2002-04-22 17:43 ` Robert Dewar
2002-04-22 9:04 Dmitry A. Kazakov
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