There's been a change to the init function for the Iwahori Hecke Algebra
that causes the NilCoxeterAlgebra to fail. I _think_ this is happening in
the affine_iwahori_hecke_algebras.patch; the nilcoxeter algebra is still
working fine with combinat unapplied.
There's an extra parameter (omega) in the IwahoriHecke Algebra now, and
since the NilCoxeter is calling the __init__ function directly, it's
apparently expected to provide a value for this new parameter. I'm not
terribly sure if it's better to change the IHA constructor to not expect
the omega, or to change the Nilcoxeter to provide a value.
Any thoughts?
sage: W=WeylGroup(['A',5,1])
sage: NilCoxeterAlgebra(W)
---------------------------------------------------------------------------
TypeError Traceback (most recent call last)
/home/kaibutsu/<ipython console> in <module>()
/home/kaibutsu/sage-5.5/local/lib/python2.7/site-packages/sage/misc/classcall_metaclass.so
in sage.misc.classcall_metaclass.ClasscallMetaclass.__call__
(sage/misc/classcall_metaclass.c:991)()
/home/kaibutsu/sage-5.5/local/lib/python2.7/site-packages/sage/misc/cachefunc.so
in sage.misc.cachefunc.WeakCachedFunction.__call__
(sage/misc/cachefunc.c:5077)()
/home/kaibutsu/sage-5.5/local/lib/python2.7/site-packages/sage/structure/unique_representation.pyc
in __classcall__(cls, *args, **options)
464 True
465 """
--> 466 instance = typecall(cls, *args, **options)
467 assert isinstance( instance, cls )
468 if instance.__class__.__reduce__ ==
UniqueRepresentation.__reduce__:
/home/kaibutsu/sage-5.5/local/lib/python2.7/site-packages/sage/misc/classcall_metaclass.so
in sage.misc.classcall_metaclass.typecall
(sage/misc/classcall_metaclass.c:1350)()
/home/kaibutsu/sage-5.5/local/lib/python2.7/site-packages/sage/algebras/nil_coxeter_algebra.pyc
in __init__(self, W, base_ring, prefix)
63 self._base_ring = base_ring
64 self._cartan_type = W.cartan_type()
---> 65 IwahoriHeckeAlgebraT.__init__(self, W, 0, 0, base_ring,
prefix=prefix)
66
67 def _repr_(self):
TypeError: __init__() takes exactly 7 arguments (6 given)
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