FYI
---------- Forwarded message ----------
From: Steve Linton <[EMAIL PROTECTED]>
Date: Nov 9, 2007 3:49 AM
Subject: Re: Fwd: [sage-support] Issue with interface to Gap in 2.8.12
To: David Joyner <[EMAIL PROTECTED]>
Distinction between Print and View is the issue here. Viw truncates, Print
does not.
Try
gap> PermList([1000,999..1]);
and compare
gap> Print(PermList([1000,999..1]),"\n");
Steve
On Thu, 8 Nov 2007 21:01:00 -0400
"David Joyner" <[EMAIL PROTECTED]> wrote:
> Hi Steve:
> I'm wondering if you can shed light on this question of how
> GAP prints large permutations. Is SAGE parsing GAP's
> output incorrectly?
> - David
>
> ---------- Forwarded message ----------
> From: Carlo Hämäläinen <[EMAIL PROTECTED]>
> Date: Nov 8, 2007 8:24 PM
> Subject: [sage-support] Issue with interface to Gap in 2.8.12
> To: sage-support@googlegroups.com
>
>
>
> Hi,
>
> Is there a limit on the size of permutations with the Gap interface? I
> managed to get an error today which seems to be due to Gap putting
> "(...)" at the end of a line. Here's the error:
>
> <type 'exceptions.TypeError'>: Gap produced error output
> Syntax error: expression expected in
> /home/carlo/.sage//temp/t40/13158//interf\
> ace//tmp line 1
> $sage3:=(1,2,8,30,43,13,3)(4,18,56,140,145,59,19)(5,23,69,162,167,72,24)(6,11,\
> 33,86,114,46,16)(7,12,34,87,115,47,17)(9,35,96,208,146,61,21)(10,38,103,220,16\
> 8,74,27)(14,22,58,141,252,124,48)(15,26,71,163,264,131,51)(20,62,150,284,288,1\
> 53,63)(25,75,172,306,310,175,76)(28,41,94,190,234,122,54)(29,42,95,191,235,123\
> ,55)(31,88,192,281,149,67,37)(32,91,199,303,171,81,40)(36,98,211,237,241,213,9\
> 9)(39,105,223,244,248,225,106)(44,50,68,144,277,236,116)(45,53,80,166,299,243,\
> 119)(49,126,255,197,193,258,127)(52,133,267,204,200,270,134)(57,142,278,232,28\
> 9,155,65)(60,66,152,285,185,282,147)(64,156,292,319,333,295,157)(70,164,300,23\
> 3,311,177,79)(73,78,174,307,188,304,169)(77,178,314,322,336,315,179)(82,110,20\
> 6,298,280,250,138)(83,111,207,276,302,251,139)(...);;
>
> \
>
> \
>
> \
>
> \
>
> \
>
> \
>
> \
>
> \
>
> \
> ^
>
> executing Read("/home/carlo/.sage//temp/t40/13158//interface//tmp");
>
>
>
> Here's the code to reproduce it:
>
> def p3Group(p):
> assert is_prime(p)
>
> F = gap.new("FreeGroup(3)")
>
> a = F.gen(1)
> b = F.gen(2)
> c = F.gen(3)
>
> rels = []
> rels.append( a**Integer(p) )
> rels.append( b**Integer(p) )
> rels.append( c**Integer(p) )
> rels.append( a*b*((b*a*c)**Integer(-1)) )
> rels.append( c*a*((a*c)**Integer(-1)) )
> rels.append( c*b*((b*c)**Integer(-1)) )
>
> N = gap.NormalClosure(F, gap.Subgroup(F, rels))
> niso = gap.NaturalHomomorphismByNormalSubgroupNC(F, N)
>
> a = PermutationGroupElement(gap.Image(niso, a))
>
> # This works:
> p3Group(5)
>
> # This blows up:
> p3Group(7)
>
>
--
Steve Linton School of Computer Science &
Centre for Interdisciplinary Research in Computational Algebra
University of St Andrews Tel +44 (1334) 463269
http://www.cs.st-and.ac.uk/~sal Fax +44 (1334) 463278
--~--~---------~--~----~------------~-------~--~----~
To post to this group, send email to sage-support@googlegroups.com
To unsubscribe from this group, send email to [EMAIL PROTECTED]
For more options, visit this group at
http://groups.google.com/group/sage-support
URLs: http://sage.math.washington.edu/sage/ and http://sage.scipy.org/sage/
-~----------~----~----~----~------~----~------~--~---
