On 11/13/2012 02:07 AM, P Purkayastha wrote:
On 11/13/2012 01:06 AM, Ben Hutz wrote:
The following works
sage: R.<t>=PolynomialRing(QQ)
sage: S.<x>=PolynomialRing(R)
sage: x/S(2)
x/2
The following does not
sage: R.<t>=PolynomialRing(QQ)
sage: S.<x,y>=PolynomialRing(R)
sage: x/S(2)
Traceback (most recent call last):
...
AttributeError: 'int' object has no attribute 'parent'
Seems to me that if the first one works, then so should the second. I
searched the trac server and couldn't come up with anything on this.
Thanks,
Ben
There is a simple fix for this (I hope).
--- a/sage/rings/polynomial/multi_polynomial_element.py
+++ b/sage/rings/polynomial/multi_polynomial_element.py
@@ -280,7 +280,7 @@
53 bits of precision
"""
if right in self.base_ring():
- inv = 1/self.base_ring()(right)
+ inv = self.base_ring()(1)/self.base_ring()(right)
return inv*self
return self.parent().fraction_field()(self, right, coerce=False)
If it looks right, then I can try and open a ticket.
Oh. by the way, the command works after applying this ppatch:
sage: sage: R.<t>=PolynomialRing(QQ)
sage: sage: S.<x,y>=PolynomialRing(R)
sage: sage: x/S(2)
1/2*x
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