Re: numtoperm and Factorial Number System

Bill Allombert on Wed, 10 Oct 2012 17:27:09 +0200

[Date Prev] [Date Next] [Thread Prev] [Thread Next] [Date Index] [Thread Index]

Re: numtoperm and Factorial Number System

To: pari-users@pari.math.u-bordeaux.fr
Subject: Re: numtoperm and Factorial Number System
From: Bill Allombert <Bill.Allombert@math.u-bordeaux1.fr>
Date: Wed, 10 Oct 2012 17:27:02 +0200
Delivery-date: Wed, 10 Oct 2012 17:27:09 +0200
In-reply-to: <20121007100421.GA3794@math.u-bordeaux1.fr>
Mail-followup-to: pari-users@pari.math.u-bordeaux.fr
References: <5070C51D.4000805@gmail.com> <20121007100421.GA3794@math.u-bordeaux1.fr>
User-agent: Mutt/1.5.20 (2009-06-14)

On Sun, Oct 07, 2012 at 12:04:21PM +0200, Karim Belabas wrote:
> * Mathieu Carbou [2012-10-07 01:56]:
> [...]
> > I was wondering why in PARI the numtoperm does not match the Nth
> > permutation in the factorial number system ?
> 
> No particular reason. The code was submitted (by Ilya Zakharevich) and
> included essentially "as is".

I just created a git branch 'bill-numtoperm_lex' that changes Ilya code
minimally to use lexicographic ordering.

Cheers,
Bill.

References:
- numtoperm abd Factorial Number System
  - From: Mathieu Carbou <mathieu.carbou@gmail.com>
- Re: numtoperm and Factorial Number System
  - From: Karim Belabas <Karim.Belabas@math.u-bordeaux1.fr>

Prev by Date: Re: numtoperm abd Factorial Number System
Next by Date: Multiple assignment
Previous by thread: Re: numtoperm and Factorial Number System
Next by thread: Re: numtoperm abd Factorial Number System
Index(es):
- Date
- Thread