On Wednesday, April 5, 2023 at 2:49:39 AM UTC+8 John H Palmieri wrote:
In lengthy code, you could start with a line like OnSets = libgap.OnSets and then in the rest of the code, you could do `g.Stabilizer([1,2], OnSets)`. That is, predefine whatever you want from libgap, giving each item a meaningful name, and then use that name in the rest of the code. Thanks for this tip. It does the trick: werner@X10DAi:~$ sage ┌────────────────────────────────────────────────────────────────────┐ │ SageMath version 10.0.beta3, Release Date: 2023-03-02 │ │ Using Python 3.10.7. Type "help()" for help. │ └────────────────────────────────────────────────────────────────────┘ ┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓ ┃ Warning: this is a prerelease version, and it may be unstable. ┃ ┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛ sage: g = libgap.SymmetricGroup(4) sage: OnSets = libgap.OnSets sage: g.Stabilizer([1,2], OnSets) Group([ (3,4), (1,2) ]) On Tuesday, April 4, 2023 at 10:08:02 AM UTC-7 Hongyi Zhao wrote: On Friday, March 31, 2023 at 1:38:47 AM UTC+8 Dima Pasechnik wrote: On Thu, 30 Mar 2023, 18:25 'Peter Mueller' via sage-support, < sage-s...@googlegroups.com> wrote: When working with finite permutation groups, it seems to me that one has the choice to either use the groups as sage objects like `SymmetricGroup(4)`, or as a Gap object via `libgap.SymmetricGroup(4)`. The former has rather limited functionality (and quite a few bugs as reported earlier), so the advise was to use the latter concept. So after setting `g = libgap.SymmetricGroup(4)`, things like `g.Stabilizer(1)` work as expected. However, I have difficulties to figure out how for instance the equivalent of the Gap code `Stabilizer(g, [1,2], OnSets)` would look like. Something like `g. Stabilizer([1, 2], 'OnSets')` raises a GapError. it is g. Stabilizer([1, 2], libgap.OnSets) In lengthy code, calling too many keywords such as "libgap" is not elegant in my opinion. Zhao (which makes sense, as in GAP you also don't pass a string to Stabilizer, but you pass a GAP action) Are these things documented somewhere? I couldn't find anything. all we have is https://doc.sagemath.org/html/en/reference/libs/sage/libs/gap/libgap.html (and source code, eg in src/sage/graphs/) - pull requests welcome 😁 Dima -- Peter Mueller -- 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...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/sage-support/9702a206-d4d9-4d05-95eb-3a2b729ec4c5n%40googlegroups.com <https://groups.google.com/d/msgid/sage-support/9702a206-d4d9-4d05-95eb-3a2b729ec4c5n%40googlegroups.com?utm_medium=email&utm_source=footer> . -- 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 view this discussion on the web visit https://groups.google.com/d/msgid/sage-support/b749021f-9acf-4fed-9879-ee9067d36b76n%40googlegroups.com.
