From: Christophe Raffalli <christophe.raffalli@univ-savoie.fr>
To: Christophe Raffalli <christophe.raffalli@univ-savoie.fr>
Cc: Thomas Gazagnaire <thomas.gazagnaire@irisa.fr>,
caml-list <caml-list@inria.fr>
Subject: Re: [Caml-list] Integral solutions of rational linear equations
Date: Wed, 30 Nov 2005 10:06:46 +0100 [thread overview]
Message-ID: <438D6BA6.5070201@univ-savoie.fr> (raw)
In-Reply-To: <438D67A2.4050500@univ-savoie.fr>
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Christophe Raffalli a écrit :
> Thomas Gazagnaire a écrit :
>
>>Hello,
>>
>>in my one of my Ocaml programs, I need to find all integers solutions of
>>a rational equation systems. This algo uses Gauss reduction and Hermite
>>normal form, and need to know if a rational is an integer or not (ie. I
>>don't want to use numerical approximation : (1/3) * 3 is an integer but
>>0,333333*3 we don't know). I didn't find any integer algebra package for
>>ocaml, so I tried to implement Gauss elimination (easy) and Hermite
>>normal form (more difficult...). But I didn't implement optimized
>>version of these algorithms...
>>
>>So my question is : do you know if exists a native ocaml module or an
>>interface with a C library which is able to do integer/rational matrix
>>manipulation (essentialy the Hermite normal form) in an efficient way ?
>>
>
>
> you did not look very hard ? OCaml is distributed with the bignum
> library in standard which does both int and rationnal ...
>
Sorry, I did not read the matrix word ...
Thks to the one who made me notice ...
>>_______________________________________________
>>Caml-list mailing list. Subscription management:
>>http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list
>>Archives: http://caml.inria.fr
>>Beginner's list: http://groups.yahoo.com/group/ocaml_beginners
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>
>
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next prev parent reply other threads:[~2005-11-30 9:06 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-09-02 12:02 Unsafe features Florian Weimer
2005-09-03 9:24 ` [Caml-list] " Damien Bobillot
2005-09-03 9:40 ` Florian Weimer
2005-09-03 11:19 ` Jon Harrop
2005-09-03 12:07 ` yoann padioleau
2005-09-03 14:28 ` Florian Weimer
2005-09-03 14:35 ` yoann padioleau
2005-09-03 14:47 ` Florian Weimer
2005-09-03 14:51 ` Florian Weimer
2005-09-03 14:55 ` yoann padioleau
2005-09-04 1:58 ` Jacques Garrigue
2005-09-03 9:29 ` Erik de Castro Lopo
2005-11-29 18:46 ` Integral solutions of rational linear equations Thomas Gazagnaire
2005-11-30 8:32 ` [Caml-list] " Sebastian Egner
2005-11-30 8:49 ` Christophe Raffalli
2005-11-30 9:06 ` Christophe Raffalli [this message]
2005-11-30 9:08 ` Christophe Raffalli
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