Given the resolution of
http://trac.sagemath.org/sage_trac/ticket/3936
it may be too hard to solve this one:
A=GF(7)['h','k']
B=RealField()['x','y']
C=Integers()
A<B #true
B<C #true
A<C #false
Perhaps someone with more understanding of sage internals could give
it a thought how comparison could be made more consistent? The whole
point of having a universal ordering is that comparison is transitive.
On a side note, in order to get an idea of the extent to which
transitivity fails, I tried to sort the pickle jar:
L=[]
path="/usr/local/sage/default/tmp/pickle_jar-3.4"
for n in os.listdir(path):
if n.endswith(".sobj"):
L.append(load(path+"/"+n))
L.sort()
This fails on a:
AttributeError: 'TranspositionCryptosystem' object has no attribute
'_ring'
(triggered by a __cmp__ somewhere)
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