Dear all,
(cross post sage-devel, sage-nt)
While working on something else I discovered that it is possible to
multiply vectors over QQ by elements of Zmod rings
{{{
sage: Zmod(5).an_element() * (QQ^2).an_element()
(0, 0)
sage: parent(_)
Vector space of dimension 2 over Ring of integers modulo 5
}}}
However it is not possible to multiply rationals by elements of Zmod ring
{{{
sage: Zmod(5).an_element() * QQ.an_element()
Traceback (most recent call last):
...
TypeError: unsupported operand parent(s) for '*': 'Ring of integers
modulo 5' and 'Rational Field'
}}}
I think that the behavior of these operations should be similar. Do
you think that
A) the above is fine (with explanation please)
B) we should raise an error in the first example
C) the second example should work and the answer be an element of Zmod(5)
D) ?
Cheers
Vincent
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