Re: [Bug-apl] Problem with modulo arithmetic on Gaussian integers

[Frederick Pitts]

Juergen,

        I did a 'make clean' followed by 'make' and 'make install'.  I
obtained the same result that caused me to report the problem.

        The version of gnu-apl I'm using is svn rev 933.  From the
banner in your email, I see you're testing with code from your personal
svn.  Is it possible the changes you recently made to (ComplexCell.hh
and FloatCell.hh) are not yet in the svn from which I clone?

Regards,

Fred

On Tue, 2017-04-25 at 22:05 +0200, Juergen Sauermann wrote:
> Hi Fred,
> 
> actually it does on my machine:
> 
>                     ______ _   __ __  __    ___     ____   __ 
>                    / ____// | / // / / /   /   |   / __ \ / / 
>                   / / __ /  |/ // / / /   / /| |  / /_/ // /  
>                  / /_/ // /|  // /_/ /   / ___ | / ____// /___
>                  \____//_/ |_/ \____/   /_/  |_|/_/    /_____/
>                                        
>                  Welcome to GNU APL version 1.7 / 12784:12785M
>                                        
>                 Copyright (C) 2008-2016  Dr. Jürgen Sauermann
>                        Banner by FIGlet: www.figlet.org
>                                        
>                 This program comes with ABSOLUTELY NO WARRANTY;
>                           for details run: apl --gpl.
>                                        
>      This program is free software, and you are welcome to
> redistribute it
>          according to the GNU Public License (GPL) version 3 or
> later.
>                                        
>       23J1 25J25 ÷ 3J1
> 7J¯2 10J5
> 
>       3J1 | 23J1 25J25
> 0 0
> 
> 
> However, if I remember correctly then some of the changes that I made
> lately were in
> header files (ComplexCell.hh and FloatCell.hh). If you did
> ./configure without options, then
> your build is probably is a 'fast' one, which may not have detected
> header file changes.
> 
> Please try make clean at the top level and rebuild GNU APL to see if
> the problem persists.
> 
> Best Regards,
> Jürgen Sauermann
> 
> 
> 
> On 04/25/2017 09:30 PM, Frederick Pitts wrote:
> > Jeurgen,
> > 
> >    A greatest common divisor of 23J1 and 25J25 is 3J1.
> > Complex division by of 23J1 and 25J25 by 3J1 yields Gaussian
> > integers
> > 
> >       23J1 25J25 ÷ 3J1
> > 7J¯2 10J5
> > 
> > but mod 3J1 of the same numbers does not consistently yield zeroes
> > 
> >       3J1 | 23J1 25J25
> > 3J1 0
> > 
> > I can provide numerous other examples of this problem if needed.
> > 
> > Regards,
> > 
> > Fred
> > 
> > 
> > 
> > 
>