On Nov 9, 2009, at 8:58 AM, Adam Sorkin wrote:
>
> I'd like to do it this way, running everything through sage, but it
> doesn't work. Here is what I'm getting:
>
> sage: g = SymmetricGroup(3)
> sage: t = [(2,1),(2,1)]
> sage: gap.Braid(g,t)
> ---------------------------------------------------------------------------
> RuntimeError: Gap produced error output
> Error, no 1st choice method found for `IsConjugate' on 3 arguments
>
> executing Braid($sage9,$sage16);
Hmm... Not sure about this. I'm guessing t is not the right thing.
> I get a different error using
> gap.eval("Braid(%s,%s)" % gap(g), gap(t))
>
> Specifically,
>
> sage: gap.eval("Braid(%s,%s)" % gap(g), gap(t) )
> ---------------------------------------------------------------------------
> TypeError Traceback (most recent call
> last)
>
> /Users/adamsorkin/Desktop/braid_dir/<ipython console> in <module>()
>
> TypeError: not enough arguments for format string
>
>
> Perhaps this one is easier to fix.
Yes, that should be
sage: gap.eval("Braid(%s,%s)" % (gap(g), gap(t)) )
But will probably give the same error. Is this what t is supposed to
be in GAP?
sage: t = [(2,1),(2,1)]
sage: gap(t)
[ [ 2, 1 ], [ 2, 1 ] ]
Or did you want something like
sage: sage: g = SymmetricGroup(3)
sage: t = [g((2,1)), g((3,1))] # let t be a list of group elements
(not a list of tuples)
sage: gap(t)
[ (1,2), (1,3) ]
sage: gap.Braid(g,t) # this is more likely to work
Sorry this is so rough around the edges. Usually what happens is
someone wraps the functionality nicely, so all this happens behind the
scenes and it "just works," but that obviously hasn't happened for the
Braids package.
- Robert
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