[sage-support] Re: Segmentation fault in singular multi-polynomial factor() function
Dominique Laurain wrote:
I usually factor small polynomials...but this time I got a
Segmentation fault for a bigger one...is it ok to get that error (no
control of enough memory or processor task force to get the result) ?
Maybe I want t much :-) ... over the quota.?
Dominique
Project-id: 6429970e-5a78-4aee-a6b1-af1e80542481
Location:f71dab5b-f40c-48db-a3d2-eefe6ec55f01
hostname : compute2dc2
Run in SAGE python cell:
# Segmentation fault in singular factorization
u,v,w = var('u,v,w')
f(u,v,w) = 16*u^4*v^6*w^2 + 144*u^4*v^5*w^3 + 80*u^3*v^6*w^3 +
416*u^4*v^4*w^4 + 560*u^3*v^5*w^4 + 96*u^2*v^6*w^4 + 560*u^4*v^3*w^5 +
1296*u^3*v^4*w^5 + 368*u^2*v^5*w^5 + 16*u*v^6*w^5 + 384*u^4*v^2*w^6 +
1328*u^3*v^3*w^6 + 528*u^2*v^4*w^6 + 48*u*v^5*w^6 + 128*u^4*v*w^7 +
608*u^3*v^2*w^7 + 336*u^2*v^3*w^7 + 48*u*v^4*w^7 + 16*u^4*w^8 +
96*u^3*v*w^8 + 80*u^2*v^2*w^8 + 16*u*v^3*w^8 - 112*u^4*v^5*w^2 -
64*u^3*v^6*w^2 - 752*u^4*v^4*w^3 - 960*u^3*v^5*w^3 - 176*u^2*v^6*w^3 -
1648*u^4*v^3*w^4 - 3744*u^3*v^4*w^4 - 1344*u^2*v^5*w^4 - 64*u*v^6*w^4 -
1600*u^4*v^2*w^5 - 5744*u^3*v^3*w^5 - 3104*u^2*v^4*w^5 - 304*u*v^5*w^5 -
704*u^4*v*w^6 - 3840*u^3*v^2*w^6 - 3056*u^2*v^3*w^6 - 480*u*v^4*w^6 -
112*u^4*w^7 - 1008*u^3*v*w^7 - 1296*u^2*v^2*w^7 - 304*u*v^3*w^7 -
64*u^3*w^8 - 176*u^2*v*w^8 - 64*u*v^2*w^8 + 312*u^4*v^4*w^2 +
400*u^3*v^5*w^2 + 76*u^2*v^6*w^2 + 1540*u^4*v^3*w^3 + 3436*u^3*v^4*w^3 +
1360*u^2*v^5*w^3 + 72*u*v^6*w^3 + 2412*u^4*v^2*w^4 + 8788*u^3*v^3*w^4 +
5572*u^2*v^4*w^4 + 616*u*v^5*w^4 + 1500*u^4*v*w^5 + 8836*u^3*v^2*w^5 +
8524*u^2*v^3*w^5 + 1540*u*v^4*w^5 + 316*u^4*w^6 + 3484*u^3*v*w^6 +
5512*u^2*v^2*w^6 + 1548*u*v^3*w^6 + 400*u^3*w^7 + 1348*u^2*v*w^7 +
628*u*v^2*w^7 + 72*u^2*w^8 + 76*u*v*w^8 - 448*u^4*v^3*w^2 -
1004*u^3*v^4*w^2 - 420*u^2*v^5*w^2 - 24*u*v^6*w^2 - 1548*u^4*v^2*w^3 -
5672*u^3*v^3*w^3 - 3920*u^2*v^4*w^3 - 476*u*v^5*w^3 - 1544*u^4*v*w^4 -
9500*u^3*v^2*w^4 - 10280*u^2*v^3*w^4 - 2076*u*v^4*w^4 - 460*u^4*w^5 -
5696*u^3*v*w^5 - 10244*u^2*v^2*w^5 - 3280*u*v^3*w^5 - 1008*u^3*w^6 -
3884*u^2*v*w^6 - 2108*u*v^2*w^6 - 404*u^2*w^7 - 492*u*v*w^7 - 24*u*w^8 +
352*u^4*v^2*w^2 + 1304*u^3*v^3*w^2 + 952*u^2*v^4*w^2 + 124*u*v^5*w^2 +
764*u^4*v*w^3 + 4824*u^3*v^2*w^3 + 5604*u^2*v^3*w^3 + 1228*u*v^4*w^3 +
364*u^4*w^4 + 4836*u^3*v*w^4 + 9468*u^2*v^2*w^4 + 3332*u*v^3*w^4 +
1316*u^3*w^5 + 5568*u^2*v*w^5 + 3356*u*v^2*w^5 + 928*u^2*w^6 +
1252*u*v*w^6 + 124*u*w^7 - 144*u^4*v*w^2 - 928*u^3*v^2*w^2 -
1132*u^2*v^3*w^2 - 264*u*v^4*w^2 - 148*u^4*w^3 - 2056*u^3*v*w^3 -
4264*u^2*v^2*w^3 - 1608*u*v^3*w^3 - 940*u^3*w^4 - 4252*u^2*v*w^4 -
2764*u*v^2*w^4 - 1116*u^2*w^5 - 1624*u*v*w^5 - 264*u*w^6 + 24*u^4*w^2 +
344*u^3*v*w^2 + 744*u^2*v^2*w^2 + 296*u*v^3*w^2 + 348*u^3*w^3 +
1652*u^2*v*w^3 + 1136*u*v^2*w^3 + 740*u^2*w^4 + 1140*u*v*w^4 + 296*u*w^5
- 52*u^3*w^2 - 256*u^2*v*w^2 - 184*u*v^2*w^2 - 256*u^2*w^3 - 412*u*v*w^3
- 184*u*w^4 + 36*u^2*w^2 + 60*u*v*w^2 + 60*u*w^3 - 8*u*w^2
print Factor f : ,f.factor()
This is now fixed in Sage 6.3.beta4, released today.
-leif
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[sage-support] Re: Segmentation fault in singular multi-polynomial factor() function
OK+Thanks... I will check it when release will pop up in the cloud. -- You received this message because you are subscribed to the Google Groups sage-support group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To post to this group, send email to sage-support@googlegroups.com. Visit this group at http://groups.google.com/group/sage-support. For more options, visit https://groups.google.com/d/optout.
Re: [sage-support] Re: Segmentation fault in singular multi-polynomial factor() function
On Thu, Jun 19, 2014 at 10:45 AM, Dominique Laurain dominique.laurai...@orange.fr wrote: OK+Thanks... I will check it when release will pop up in the cloud. I'm planning to wait for the official Sage 6.3 release before updating the cloud. If you want to test sooner, let me know and I can drop a temporary build in /scratch on the same VM as one of your projects (let me know the project id). -- William -- You received this message because you are subscribed to the Google Groups sage-support group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To post to this group, send email to sage-support@googlegroups.com. Visit this group at http://groups.google.com/group/sage-support. For more options, visit https://groups.google.com/d/optout. -- William Stein Professor of Mathematics University of Washington http://wstein.org -- You received this message because you are subscribed to the Google Groups sage-support group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To post to this group, send email to sage-support@googlegroups.com. Visit this group at http://groups.google.com/group/sage-support. For more options, visit https://groups.google.com/d/optout.
[sage-support] Re: Segmentation fault in singular multi-polynomial factor() function
leif wrote: Volker Braun wrote: Reported at http://www.singular.uni-kl.de:8002/trac/ticket/621 Fix committed upstream: https://github.com/Singular/Sources/commit/28f4fe9464722511718050dfab7cd61d29898968 If somebody^TM opens a ticket (or has already done so), please cc me or post the ticket # here. I'll otherwise probably do so, and check whether the patch applies clean to our version (and is sufficient for it). /Of course/^TM the patch from the pull request isn't sufficient (as it isn't based on Singular 3.1.6); working on a larger patch right now... [i.e., currently testing it] -leif -- () The ASCII Ribbon Campaign /\ Help Cure HTML E-Mail -- You received this message because you are subscribed to the Google Groups sage-support group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To post to this group, send email to sage-support@googlegroups.com. Visit this group at http://groups.google.com/group/sage-support. For more options, visit https://groups.google.com/d/optout.
[sage-support] Re: Segmentation fault in singular multi-polynomial factor() function
leif wrote: leif wrote: If somebody^TM opens a ticket (or has already done so), please cc me or post the ticket # here. I'll otherwise probably do so, and check whether the patch applies clean to our version (and is sufficient for it). /Of course/^TM the patch from the pull request isn't sufficient (as it isn't based on Singular 3.1.6); working on a larger patch right now... [i.e., currently testing it] http://trac.sagemath.org/ticket/16462 Needs review. -leif -- () The ASCII Ribbon Campaign /\ Help Cure HTML E-Mail -- You received this message because you are subscribed to the Google Groups sage-support group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To post to this group, send email to sage-support@googlegroups.com. Visit this group at http://groups.google.com/group/sage-support. For more options, visit https://groups.google.com/d/optout.
[sage-support] Re: Segmentation fault in singular multi-polynomial factor() function
Volker Braun wrote: Reported at http://www.singular.uni-kl.de:8002/trac/ticket/621 Fix committed upstream: https://github.com/Singular/Sources/commit/28f4fe9464722511718050dfab7cd61d29898968 If somebody^TM opens a ticket (or has already done so), please cc me or post the ticket # here. I'll otherwise probably do so, and check whether the patch applies clean to our version (and is sufficient for it). -leif -- () The ASCII Ribbon Campaign /\ Help Cure HTML E-Mail -- You received this message because you are subscribed to the Google Groups sage-support group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To post to this group, send email to sage-support@googlegroups.com. Visit this group at http://groups.google.com/group/sage-support. For more options, visit https://groups.google.com/d/optout.
[sage-support] Re: Segmentation fault in singular multi-polynomial factor() function
Thanks leif for your help.. Since some weeks, I have a strange (final destination) feeling falling too much into deep software traps at office or at home... -- You received this message because you are subscribed to the Google Groups sage-support group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To post to this group, send email to sage-support@googlegroups.com. Visit this group at http://groups.google.com/group/sage-support. For more options, visit https://groups.google.com/d/optout.
[sage-support] Re: Segmentation fault in singular multi-polynomial factor() function
leif wrote: leif wrote: Dominique Laurain wrote: I usually factor small polynomials...but this time I got a Segmentation fault for a bigger one...is it ok to get that error (no control of enough memory or processor task force to get the result) ? Maybe I want t much :-) ... over the quota.? Certainly not a (out of) memory error; I can reproduce it with Sage 6.3.beta2, FWIW. The answer is instantaneous with Sage 5.7 and 5.8: :-) Factor f : 4*(v + w - 1)^3*(4*u^3*v^3 + 24*u^3*v^2*w + 20*u^3*v*w^2 + 4*u^3*w^3 + 20*u^2*v^3*w + 80*u^2*v^2*w^2 + 24*u^2*v*w^3 + 24*u*v^3*w^2 + 20*u*v^2*w^3 + 4*v^3*w^3 - 16*u^3*v^2 - 44*u^3*v*w - 16*u^3*w^2 - 16*u^2*v^3 - 132*u^2*v^2*w - 132*u^2*v*w^2 - 16*u^2*w^3 - 44*u*v^3*w - 132*u*v^2*w^2 - 44*u*v*w^3 - 16*v^3*w^2 - 16*v^2*w^3 + 18*u^3*v + 19*u^3*w + 52*u^2*v^2 + 151*u^2*v*w + 52*u^2*w^2 + 19*u*v^3 + 151*u*v^2*w + 151*u*v*w^2 + 18*u*w^3 + 18*v^3*w + 52*v^2*w^2 + 19*v*w^3 - 6*u^3 - 47*u^2*v - 48*u^2*w - 48*u*v^2 - 137*u*v*w - 47*u*w^2 + 13*u^2 - 6*v^3 - 47*v^2*w - 48*v*w^2 + 37*u*w + 13*v^2 - 6*w^3 + 37*u*v + 37*v*w + 13*w^2 - 9*u - 9*v - 9*w + 2)*u*w^2 P.S.: Works with Sage 6.1.1 as well: Factor f : 4*(4*u^3*v^3 + 24*u^3*v^2*w + 20*u^2*v^3*w + 20*u^3*v*w^2 + 80*u^2*v^2*w^2 + 24*u*v^3*w^2 + 4*u^3*w^3 + 24*u^2*v*w^3 + 20*u*v^2*w^3 + 4*v^3*w^3 - 16*u^3*v^2 - 16*u^2*v^3 - 44*u^3*v*w - 132*u^2*v^2*w - 44*u*v^3*w - 16*u^3*w^2 - 132*u^2*v*w^2 - 132*u*v^2*w^2 - 16*v^3*w^2 - 16*u^2*w^3 - 44*u*v*w^3 - 16*v^2*w^3 + 18*u^3*v + 52*u^2*v^2 + 19*u*v^3 + 19*u^3*w + 151*u^2*v*w + 151*u*v^2*w + 18*v^3*w + 52*u^2*w^2 + 151*u*v*w^2 + 52*v^2*w^2 + 18*u*w^3 + 19*v*w^3 - 6*u^3 - 47*u^2*v - 48*u*v^2 - 6*v^3 - 48*u^2*w - 137*u*v*w - 47*v^2*w - 47*u*w^2 - 48*v*w^2 - 6*w^3 + 13*u^2 + 37*u*v + 13*v^2 + 37*u*w + 37*v*w + 13*w^2 - 9*u - 9*v - 9*w + 2)*u*(v + w - 1)^3*w^2 FWIW, Singular has been upgraded from 3.1.5 (in Sage 6.1.1) to 3.1.6 (6.2 and later), so this might be an upstream regression. The .factor() function in the Sage library hasn't changed at all AFAICS, but other changes in Sage may have borked it as well, although the function which apparently causes the segfault, p_Copy(), is a Singular function. The Sage-Singular experts should investigate... -leif -- () The ASCII Ribbon Campaign /\ Help Cure HTML E-Mail -- You received this message because you are subscribed to the Google Groups sage-support group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To post to this group, send email to sage-support@googlegroups.com. Visit this group at http://groups.google.com/group/sage-support. For more options, visit https://groups.google.com/d/optout.
[sage-support] Re: Segmentation fault in singular multi-polynomial factor() function
Dominique Laurain wrote: Thanks leif for your help.. Since some weeks, I have a strange (final destination) feeling falling too much into deep software traps at office or at home... Work-around: Works in Sage 6.2 if you define f (i.e., u, v and w) the right way: sage: R.u,v,w=QQ[] sage: f = 16*u^4*v^6*w^2 + 144*u^4*v^5*w^3 + 80*u^3*v^6*w^3 + 416*u^4*v^4*w^4 + 560*u^3*v^5*w^4 + 96*u^2*v^6*w^4 + 560*u^4*v^3*w^5 + 1296*u^3*v^4*w^5 + 368*u^2*v^5*w^5 + 16*u*v^6*w^5 + 384*u^4*v^2*w^6 + 1328*u^3*v^3*w^6 + 528*u^2*v^4*w^6 + 48*u*v^5*w^6 + 128*u^4*v*w^7 + 608*u^3*v^2*w^7 + 336*u^2*v^3*w^7 + 48*u*v^4*w^7 + 16*u^4*w^8 + 96*u^3*v*w^8 + 80*u^2*v^2*w^8 + 16*u*v^3*w^8 - 112*u^4*v^5*w^2 - 64*u^3*v^6*w^2 - 752*u^4*v^4*w^3 - 960*u^3*v^5*w^3 - 176*u^2*v^6*w^3 - 1648*u^4*v^3*w^4 - 3744*u^3*v^4*w^4 - 1344*u^2*v^5*w^4 - 64*u*v^6*w^4 - 1600*u^4*v^2*w^5 - 5744*u^3*v^3*w^5 - 3104*u^2*v^4*w^5 - 304*u*v^5*w^5 - 704*u^4*v*w^6 - 3840*u^3*v^2*w^6 - 3056*u^2*v^3*w^6 - 480*u*v^4*w^6 - 112*u^4*w^7 - 1008*u^3*v*w^7 - 1296*u^2*v^2*w^7 - 304*u*v^3*w^7 - 64*u^3*w^8 - 176*u^2*v*w^8 - 64*u*v^2*w^8 + 312*u^4*v^4*w^2 + 400*u^3*v^5*w^2 + 76*u^2*v^6*w^2 + 1540*u^4*v^3*w^3 + 3436*u^3*v^4*w^3 + 1360*u^2*v^5*w^3 + 72*u*v^6*w^3 + 2412*u^4*v^2*w^4 + 8788*u^3*v^3*w^4 + 5572*u^2*v^4*w^4 + 616*u*v^5*w^4 + 1500*u^4*v*w^5 + 8836*u^3*v^2*w^5 + 8524*u^2*v^3*w^5 + 1540*u*v^4*w^5 + 316*u^4*w^6 + 3484*u^3*v*w^6 + 5512*u^2*v^2*w^6 + 1548*u*v^3*w^6 + 400*u^3*w^7 + 1348*u^2*v*w^7 + 628*u*v^2*w^7 + 72*u^2*w^8 + 76*u*v*w^8 - 448*u^4*v^3*w^2 - 1004*u^3*v^4*w^2 - 420*u^2*v^5*w^2 - 24*u*v^6*w^2 - 1548*u^4*v^2*w^3 - 5672*u^3*v^3*w^3 - 3920*u^2*v^4*w^3 - 476*u*v^5*w^3 - 1544*u^4*v*w^4 - 9500*u^3*v^2*w^4 - 10280*u^2*v^3*w^4 - 2076*u*v^4*w^4 - 460*u^4*w^5 - 5696*u^3*v*w^5 - 10244*u^2*v^2*w^5 - 3280*u*v^3*w^5 - 1008*u^3*w^6 - 3884*u^2*v*w^6 - 2108*u*v^2*w^6 - 404*u^2*w^7 - 492*u*v*w^7 - 24*u*w^8 + 352*u^4*v^2*w^2 + 1304*u^3*v^3*w^2 + 952*u^2*v^4*w^2 + 124*u*v^5*w^2 + 764*u^4*v*w^3 + 4824*u^3*v^2*w^3 + 5604*u^2*v^3*w^3 + 1228*u*v^4*w^3 + 364*u^4*w^4 + 4836*u^3*v*w^4 + 9468*u^2*v^2*w^4 + 3332*u*v^3*w^4 + 1316*u^3*w^5 + 5568*u^2*v*w^5 + 3356*u*v^2*w^5 + 928*u^2*w^6 + 1252*u*v*w^6 + 124*u*w^7 - 144*u^4*v*w^2 - 928*u^3*v^2*w^2 - 1132*u^2*v^3*w^2 - 264*u*v^4*w^2 - 148*u^4*w^3 - 2056*u^3*v*w^3 - 4264*u^2*v^2*w^3 - 1608*u*v^3*w^3 - 940*u^3*w^4 - 4252*u^2*v*w^4 - 2764*u*v^2*w^4 - 1116*u^2*w^5 - 1624*u*v*w^5 - 264*u*w^6 + 24*u^4*w^2 + 344*u^3*v*w^2 + 744*u^2*v^2*w^2 + 296*u*v^3*w^2 + 348*u^3*w^3 + 1652*u^2*v*w^3 + 1136*u*v^2*w^3 + 740*u^2*w^4 + 1140*u*v*w^4 + 296*u*w^5 - 52*u^3*w^2 - 256*u^2*v*w^2 - 184*u*v^2*w^2 - 256*u^2*w^3 - 412*u*v*w^3 - 184*u*w^4 + 36*u^2*w^2 + 60*u*v*w^2 + 60*u*w^3 - 8*u*w^2 sage: f.factor() (4) * u * w^2 * (v + w - 1)^3 * (4*u^3*v^3 + 24*u^3*v^2*w + 20*u^2*v^3*w + 20*u^3*v*w^2 + 80*u^2*v^2*w^2 + 24*u*v^3*w^2 + 4*u^3*w^3 + 24*u^2*v*w^3 + 20*u*v^2*w^3 + 4*v^3*w^3 - 16*u^3*v^2 - 16*u^2*v^3 - 44*u^3*v*w - 132*u^2*v^2*w - 44*u*v^3*w - 16*u^3*w^2 - 132*u^2*v*w^2 - 132*u*v^2*w^2 - 16*v^3*w^2 - 16*u^2*w^3 - 44*u*v*w^3 - 16*v^2*w^3 + 18*u^3*v + 52*u^2*v^2 + 19*u*v^3 + 19*u^3*w + 151*u^2*v*w + 151*u*v^2*w + 18*v^3*w + 52*u^2*w^2 + 151*u*v*w^2 + 52*v^2*w^2 + 18*u*w^3 + 19*v*w^3 - 6*u^3 - 47*u^2*v - 48*u*v^2 - 6*v^3 - 48*u^2*w - 137*u*v*w - 47*v^2*w - 47*u*w^2 - 48*v*w^2 - 6*w^3 + 13*u^2 + 37*u*v + 13*v^2 + 37*u*w + 37*v*w + 13*w^2 - 9*u - 9*v - 9*w + 2) (In your definition, f(u,v,w)=..., f is just a symbolic expression in the first place. It's still of course a bug that your way currently does no longer work.) -leif -- () The ASCII Ribbon Campaign /\ Help Cure HTML E-Mail -- You received this message because you are subscribed to the Google Groups sage-support group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To post to this group, send email to sage-support@googlegroups.com. Visit this group at http://groups.google.com/group/sage-support. For more options, visit https://groups.google.com/d/optout.
[sage-support] Re: Segmentation fault in singular multi-polynomial factor() function
leif wrote: Dominique Laurain wrote: Thanks leif for your help.. Since some weeks, I have a strange (final destination) feeling falling too much into deep software traps at office or at home... Work-around: Works in Sage 6.2 if you define f (i.e., u, v and w) the right way: Sorry, my bad, forget that... (I confused the windows and only *thought* I was using 6.2). Not very surprisingly, my version behaves exactly the same in Sage 6.2. :-/ (as it just shortcuts f.polynomial(QQ).factor() to f.factor()) -leif sage: R.u,v,w=QQ[] sage: f = 16*u^4*v^6*w^2 + 144*u^4*v^5*w^3 + 80*u^3*v^6*w^3 + 416*u^4*v^4*w^4 + 560*u^3*v^5*w^4 + 96*u^2*v^6*w^4 + 560*u^4*v^3*w^5 + 1296*u^3*v^4*w^5 + 368*u^2*v^5*w^5 + 16*u*v^6*w^5 + 384*u^4*v^2*w^6 + 1328*u^3*v^3*w^6 + 528*u^2*v^4*w^6 + 48*u*v^5*w^6 + 128*u^4*v*w^7 + 608*u^3*v^2*w^7 + 336*u^2*v^3*w^7 + 48*u*v^4*w^7 + 16*u^4*w^8 + 96*u^3*v*w^8 + 80*u^2*v^2*w^8 + 16*u*v^3*w^8 - 112*u^4*v^5*w^2 - 64*u^3*v^6*w^2 - 752*u^4*v^4*w^3 - 960*u^3*v^5*w^3 - 176*u^2*v^6*w^3 - 1648*u^4*v^3*w^4 - 3744*u^3*v^4*w^4 - 1344*u^2*v^5*w^4 - 64*u*v^6*w^4 - 1600*u^4*v^2*w^5 - 5744*u^3*v^3*w^5 - 3104*u^2*v^4*w^5 - 304*u*v^5*w^5 - 704*u^4*v*w^6 - 3840*u^3*v^2*w^6 - 3056*u^2*v^3*w^6 - 480*u*v^4*w^6 - 112*u^4*w^7 - 1008*u^3*v*w^7 - 1296*u^2*v^2*w^7 - 304*u*v^3*w^7 - 64*u^3*w^8 - 176*u^2*v*w^8 - 64*u*v^2*w^8 + 312*u^4*v^4*w^2 + 400*u^3*v^5*w^2 + 76*u^2*v^6*w^2 + 1540*u^4*v^3*w^3 + 3436*u^3*v^4*w^3 + 1360*u^2*v^5*w^3 + 72*u*v^6*w^3 + 2412*u^4*v^2*w^4 + 8788*u^3*v^3*w^4 + 5572*u^2*v^4*w^4 + 616*u*v^5*w^4 + 1500*u^4*v*w^5 + 8836*u^3*v^2*w^5 + 8524*u^2*v^3*w^5 + 1540*u*v^4*w^5 + 316*u^4*w^6 + 3484*u^3*v*w^6 + 5512*u^2*v^2*w^6 + 1548*u*v^3*w^6 + 400*u^3*w^7 + 1348*u^2*v*w^7 + 628*u*v^2*w^7 + 72*u^2*w^8 + 76*u*v*w^8 - 448*u^4*v^3*w^2 - 1004*u^3*v^4*w^2 - 420*u^2*v^5*w^2 - 24*u*v^6*w^2 - 1548*u^4*v^2*w^3 - 5672*u^3*v^3*w^3 - 3920*u^2*v^4*w^3 - 476*u*v^5*w^3 - 1544*u^4*v*w^4 - 9500*u^3*v^2*w^4 - 10280*u^2*v^3*w^4 - 2076*u*v^4*w^4 - 460*u^4*w^5 - 5696*u^3*v*w^5 - 10244*u^2*v^2*w^5 - 3280*u*v^3*w^5 - 1008*u^3*w^6 - 3884*u^2*v*w^6 - 2108*u*v^2*w^6 - 404*u^2*w^7 - 492*u*v*w^7 - 24*u*w^8 + 352*u^4*v^2*w^2 + 1304*u^3*v^3*w^2 + 952*u^2*v^4*w^2 + 124*u*v^5*w^2 + 764*u^4*v*w^3 + 4824*u^3*v^2*w^3 + 5604*u^2*v^3*w^3 + 1228*u*v^4*w^3 + 364*u^4*w^4 + 4836*u^3*v*w^4 + 9468*u^2*v^2*w^4 + 3332*u*v^3*w^4 + 1316*u^3*w^5 + 5568*u^2*v*w^5 + 3356*u*v^2*w^5 + 928*u^2*w^6 + 1252*u*v*w^6 + 124*u*w^7 - 144*u^4*v*w^2 - 928*u^3*v^2*w^2 - 1132*u^2*v^3*w^2 - 264*u*v^4*w^2 - 148*u^4*w^3 - 2056*u^3*v*w^3 - 4264*u^2*v^2*w^3 - 1608*u*v^3*w^3 - 940*u^3*w^4 - 4252*u^2*v*w^4 - 2764*u*v^2*w^4 - 1116*u^2*w^5 - 1624*u*v*w^5 - 264*u*w^6 + 24*u^4*w^2 + 344*u^3*v*w^2 + 744*u^2*v^2*w^2 + 296*u*v^3*w^2 + 348*u^3*w^3 + 1652*u^2*v*w^3 + 1136*u*v^2*w^3 + 740*u^2*w^4 + 1140*u*v*w^4 + 296*u*w^5 - 52*u^3*w^2 - 256*u^2*v*w^2 - 184*u*v^2*w^2 - 256*u^2*w^3 - 412*u*v*w^3 - 184*u*w^4 + 36*u^2*w^2 + 60*u*v*w^2 + 60*u*w^3 - 8*u*w^2 sage: f.factor() (4) * u * w^2 * (v + w - 1)^3 * (4*u^3*v^3 + 24*u^3*v^2*w + 20*u^2*v^3*w + 20*u^3*v*w^2 + 80*u^2*v^2*w^2 + 24*u*v^3*w^2 + 4*u^3*w^3 + 24*u^2*v*w^3 + 20*u*v^2*w^3 + 4*v^3*w^3 - 16*u^3*v^2 - 16*u^2*v^3 - 44*u^3*v*w - 132*u^2*v^2*w - 44*u*v^3*w - 16*u^3*w^2 - 132*u^2*v*w^2 - 132*u*v^2*w^2 - 16*v^3*w^2 - 16*u^2*w^3 - 44*u*v*w^3 - 16*v^2*w^3 + 18*u^3*v + 52*u^2*v^2 + 19*u*v^3 + 19*u^3*w + 151*u^2*v*w + 151*u*v^2*w + 18*v^3*w + 52*u^2*w^2 + 151*u*v*w^2 + 52*v^2*w^2 + 18*u*w^3 + 19*v*w^3 - 6*u^3 - 47*u^2*v - 48*u*v^2 - 6*v^3 - 48*u^2*w - 137*u*v*w - 47*v^2*w - 47*u*w^2 - 48*v*w^2 - 6*w^3 + 13*u^2 + 37*u*v + 13*v^2 + 37*u*w + 37*v*w + 13*w^2 - 9*u - 9*v - 9*w + 2) (In your definition, f(u,v,w)=..., f is just a symbolic expression in the first place. It's still of course a bug that your way currently does no longer work.) -leif -- () The ASCII Ribbon Campaign /\ Help Cure HTML E-Mail -- You received this message because you are subscribed to the Google Groups sage-support group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To post to this group, send email to sage-support@googlegroups.com. Visit this group at http://groups.google.com/group/sage-support. For more options, visit https://groups.google.com/d/optout.
[sage-support] Re: Segmentation fault in singular multi-polynomial factor() function
Upstream bug: $ sage -singular SINGULAR / Development A Computer Algebra System for Polynomial Computations / version 3-1-6 0 by: W. Decker, G.-M. Greuel, G. Pfister, H. Schoenemann \ Dec 2012 FB Mathematik der Universitaet, D-67653 Kaiserslautern\ ring r = 0,(u,v,w),dp; poly f = 16*u^4*v^6*w^2+144*u^4*v^5*w^3+80*u^3*v^6*w^3+416*u^4*v^4*w^4+560*u^3*v^5*w^4+96*u^2*v^6*w^4+560*u^4*v^3*w^5+1296*u^3*v^4*w^5+368*u^2*v^5*w^5+16*u*v^6*w^5+384*u^4*v^2*w^6+1328*u^3*v^3*w^6+528*u^2*v^4*w^6+48*u*v^5*w^6+128*u^4*v*w^7+608*u^3*v^2*w^7+336*u^2*v^3*w^7+48*u*v^4*w^7+16*u^4*w^8+96*u^3*v*w^8+80*u^2*v^2*w^8+16*u*v^3*w^8-112*u^4*v^5*w^2-64*u^3*v^6*w^2-752*u^4*v^4*w^3-960*u^3*v^5*w^3-176*u^2*v^6*w^3-1648*u^4*v^3*w^4-3744*u^3*v^4*w^4-1344*u^2*v^5*w^4-64*u*v^6*w^4-1600*u^4*v^2*w^5-5744*u^3*v^3*w^5-3104*u^2*v^4*w^5-304*u*v^5*w^5-704*u^4*v*w^6-3840*u^3*v^2*w^6-3056*u^2*v^3*w^6-480*u*v^4*w^6-112*u^4*w^7-1008*u^3*v*w^7-1296*u^2*v^2*w^7-304*u*v^3*w^7-64*u^3*w^8-176*u^2*v*w^8-64*u*v^2*w^8+312*u^4*v^4*w^2+400*u^3*v^5*w^2+76*u^2*v^6*w^2+1540*u^4*v^3*w^3+3436*u^3*v^4*w^3+1360*u^2*v^5*w^3+72*u*v^6*w^3+2412*u^4*v^2*w^4+8788*u^3*v^3*w^4+5572*u^2*v^4*w^4+616*u*v^5*w^4+1500*u^4*v*w^5+8836*u^3*v^2*w^5+8524*u^2*v^3*w^5+1540*u*v^4*w^5+316*u^4*w^6+3484*u^3*v*w^6+5512*u^2*v^2*w^6+1548*u*v^3*w^6+400*u^3*w^7+1348*u^2*v*w^7+628*u*v^2*w^7+72*u^2*w^8+76*u*v*w^8-448*u^4*v^3*w^2-1004*u^3*v^4*w^2-420*u^2*v^5*w^2-24*u*v^6*w^2-1548*u^4*v^2*w^3-5672*u^3*v^3*w^3-3920*u^2*v^4*w^3-476*u*v^5*w^3-1544*u^4*v*w^4-9500*u^3*v^2*w^4-10280*u^2*v^3*w^4-2076*u*v^4*w^4-460*u^4*w^5-5696*u^3*v*w^5-10244*u^2*v^2*w^5-3280*u*v^3*w^5-1008*u^3*w^6-3884*u^2*v*w^6-2108*u*v^2*w^6-404*u^2*w^7-492*u*v*w^7-24*u*w^8+352*u^4*v^2*w^2+1304*u^3*v^3*w^2+952*u^2*v^4*w^2+124*u*v^5*w^2+764*u^4*v*w^3+4824*u^3*v^2*w^3+5604*u^2*v^3*w^3+1228*u*v^4*w^3+364*u^4*w^4+4836*u^3*v*w^4+9468*u^2*v^2*w^4+3332*u*v^3*w^4+1316*u^3*w^5+5568*u^2*v*w^5+3356*u*v^2*w^5+928*u^2*w^6+1252*u*v*w^6+124*u*w^7-144*u^4*v*w^2-928*u^3*v^2*w^2-1132*u^2*v^3*w^2-264*u*v^4*w^2-148*u^4*w^3-2056*u^3*v*w^3-4264*u^2*v^2*w^3-1608*u*v^3*w^3-940*u^3*w^4-4252*u^2*v*w^4-2764*u*v^2*w^4-1116*u^2*w^5-1624*u*v*w^5-264*u*w^6+24*u^4*w^2+344*u^3*v*w^2+744*u^2*v^2*w^2+296*u*v^3*w^2+348*u^3*w^3+1652*u^2*v*w^3+1136*u*v^2*w^3+740*u^2*w^4+1140*u*v*w^4+296*u*w^5-52*u^3*w^2-256*u^2*v*w^2-184*u*v^2*w^2-256*u^2*w^3-412*u*v*w^3-184*u*w^4+36*u^2*w^2+60*u*v*w^2+60*u*w^3-8*u*w^2; factorize(f); Singular : signal 11 (v: 3160): current line:factorize(f); Segment fault/Bus error occurred at 2 because of 10202 (r:1402010493) please inform the authors trying to restart... -- You received this message because you are subscribed to the Google Groups sage-support group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To post to this group, send email to sage-support@googlegroups.com. Visit this group at http://groups.google.com/group/sage-support. For more options, visit https://groups.google.com/d/optout.
[sage-support] Re: Segmentation fault in singular multi-polynomial factor() function
Reported at http://www.singular.uni-kl.de:8002/trac/ticket/621 -- You received this message because you are subscribed to the Google Groups sage-support group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To post to this group, send email to sage-support@googlegroups.com. Visit this group at http://groups.google.com/group/sage-support. For more options, visit https://groups.google.com/d/optout.
[sage-support] Re: Segmentation fault in singular multi-polynomial factor() function
leif wrote: Dominique Laurain wrote: I usually factor small polynomials...but this time I got a Segmentation fault for a bigger one...is it ok to get that error (no control of enough memory or processor task force to get the result) ? Maybe I want t much :-) ... over the quota.? Certainly not a (out of) memory error; I can reproduce it with Sage 6.3.beta2, FWIW. The answer is instantaneous with Sage 5.7 and 5.8: :-) Factor f : 4*(v + w - 1)^3*(4*u^3*v^3 + 24*u^3*v^2*w + 20*u^3*v*w^2 + 4*u^3*w^3 + 20*u^2*v^3*w + 80*u^2*v^2*w^2 + 24*u^2*v*w^3 + 24*u*v^3*w^2 + 20*u*v^2*w^3 + 4*v^3*w^3 - 16*u^3*v^2 - 44*u^3*v*w - 16*u^3*w^2 - 16*u^2*v^3 - 132*u^2*v^2*w - 132*u^2*v*w^2 - 16*u^2*w^3 - 44*u*v^3*w - 132*u*v^2*w^2 - 44*u*v*w^3 - 16*v^3*w^2 - 16*v^2*w^3 + 18*u^3*v + 19*u^3*w + 52*u^2*v^2 + 151*u^2*v*w + 52*u^2*w^2 + 19*u*v^3 + 151*u*v^2*w + 151*u*v*w^2 + 18*u*w^3 + 18*v^3*w + 52*v^2*w^2 + 19*v*w^3 - 6*u^3 - 47*u^2*v - 48*u^2*w - 48*u*v^2 - 137*u*v*w - 47*u*w^2 + 13*u^2 - 6*v^3 - 47*v^2*w - 48*v*w^2 + 37*u*w + 13*v^2 - 6*w^3 + 37*u*v + 37*v*w + 13*w^2 - 9*u - 9*v - 9*w + 2)*u*w^2 P.S.: Works with Sage 6.1.1 as well: Factor f : 4*(4*u^3*v^3 + 24*u^3*v^2*w + 20*u^2*v^3*w + 20*u^3*v*w^2 + 80*u^2*v^2*w^2 + 24*u*v^3*w^2 + 4*u^3*w^3 + 24*u^2*v*w^3 + 20*u*v^2*w^3 + 4*v^3*w^3 - 16*u^3*v^2 - 16*u^2*v^3 - 44*u^3*v*w - 132*u^2*v^2*w - 44*u*v^3*w - 16*u^3*w^2 - 132*u^2*v*w^2 - 132*u*v^2*w^2 - 16*v^3*w^2 - 16*u^2*w^3 - 44*u*v*w^3 - 16*v^2*w^3 + 18*u^3*v + 52*u^2*v^2 + 19*u*v^3 + 19*u^3*w + 151*u^2*v*w + 151*u*v^2*w + 18*v^3*w + 52*u^2*w^2 + 151*u*v*w^2 + 52*v^2*w^2 + 18*u*w^3 + 19*v*w^3 - 6*u^3 - 47*u^2*v - 48*u*v^2 - 6*v^3 - 48*u^2*w - 137*u*v*w - 47*v^2*w - 47*u*w^2 - 48*v*w^2 - 6*w^3 + 13*u^2 + 37*u*v + 13*v^2 + 37*u*w + 37*v*w + 13*w^2 - 9*u - 9*v - 9*w + 2)*u*(v + w - 1)^3*w^2 -leif -- () The ASCII Ribbon Campaign /\ Help Cure HTML E-Mail -- You received this message because you are subscribed to the Google Groups sage-support group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To post to this group, send email to sage-support@googlegroups.com. Visit this group at http://groups.google.com/group/sage-support. For more options, visit https://groups.google.com/d/optout.
