Opened 8 years ago

Last modified 6 years ago

#13810 closed defect

Galois group when polynomial has too high degree — at Version 6

Reported by: jmantysalo Owned by: davidloeffler
Priority: minor Milestone: sage-6.8
Component: number fields Keywords:
Cc: Merged in:
Authors: Reviewers:
Report Upstream: N/A Work issues:
Branch: Commit:
Dependencies: Stopgaps:

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Description (last modified by jdemeyer)

In 5.4, with KASH installed:

NumberField(x^21-2, 'a').galois_group(type="pari").order()

gives answer 252, but with

NumberField(x^22-2, 'a').galois_group(type="pari").order()

I got

Error, the variable '_s_' must have a value

I guess this relates to kash interface.

Change History (6)

comment:1 Changed 8 years ago by jmantysalo

Tested with 5.10: After trying R.<x>=QQ[]; (x23-2).galois_group().order() I can't calculate for example R.<x>=QQ[]; (x20-2).galois_group().order(). It seems that internal(?) kash instance fails and Sage don't notice it. User must restart worksheet to get this running again.

comment:2 Changed 8 years ago by chapoton

  • Description modified (diff)

comment:3 Changed 8 years ago by jdemeyer

  • Milestone changed from sage-5.11 to sage-5.12

comment:4 Changed 7 years ago by jmantysalo

In 5.13beta1 with kash package

NumberField(x^15-2, 'a').galois_group(type="pari").order()

gives

ValueError: Index n must be in {1,..,None}

comment:5 Changed 7 years ago by jdemeyer

  • Milestone changed from sage-6.1 to sage-wishlist

comment:6 Changed 7 years ago by jdemeyer

  • Description modified (diff)
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