Wow, I had never heard of inject_on() until now. Amazing! It looks
as if it has been in Sage for a long time, since its docstring says
"Add code ... and send William Stein a patch"!
John
On Sep 26, 2:16 am, Robert Bradshaw
wrote:
> On Sat, Sep 25, 2010 at 10:51 AM, kcrisman wrote:
>
> >> This
On Sat, Sep 25, 2010 at 10:51 AM, kcrisman wrote:
>
>> This is the only possibility, because the "var('x')" command executed
>> by default at startup did the assignment
>>
>> x = SR('x')
>>
>> and you haven't bound x to any other object. Once you execute
>>
>> x = b.0
>>
>> [ or one of its implici
> This is the only possibility, because the "var('x')" command executed
> by default at startup did the assignment
>
> x = SR('x')
>
> and you haven't bound x to any other object. Once you execute
>
> x = b.0
>
> [ or one of its implicit forms like b.=PolynomialRing(ZZ,'x')] then
> x is no longer
On Sep 24, 6:56 pm, kcrisman wrote:
> If I make a polynomial ring using
>
> sage: b = PolynomialRing(ZZ, 'x')
>
> I get some odd behavior. Namely,
>
> sage: bool(b(x)==x)
> True
I personally find this slightly worrisome, but this was a design
decision (equality respects automatic coercions)
> s
