Dear all,
I have implemented a finite matrix group as explained in
"http://www.sagemath.org/doc/reference/sage/groups/libgap_wrapper.html";,
starting from some matrix generators, i.e. in the example
"libgap.Group(generators)" instead of "libgap.CyclicGroup(3)". Everything
works fine: I call an element and get its matrix representation printed.
However, I can not get the element easily as a Matrix instance, what I want
to do to take its Smith normal form. The only way I have found to work so
far is, being ``element`` an instance of the Element class,
sage: Matrix(self.base_ring(), self.gap().sage())
which works, but something tells me there is an easier way. Is there?
Second, how do I cast a gap integer into a safe integer? For example, the
following fails:
sage: a =libgap.DimensionOfMatrixGroup(group)
sage: print a
>>> 2
sage: ZZ(a)
>>> [...] TypeError: unable to coerce <type
'sage.libs.gap.element.GapElement_Integer'> to an integer
Is there a proper way, or a workaround?
Anyway, I think libgap is one of the best contributions to sage possible.
Thanks so much, Volker!
Cheers,
Jesús Torrado
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