2009/6/17 Robert Bradshaw <rober...@math.washington.edu>:
>
> On Jun 17, 2009, at 4:05 AM, John Cremona wrote:
>
>> I think is is easier, both on the eye and for a beginner to
>> understand:
>>
>> sage: x = polygen(ZZ)
>> sage: f = 2*x**2 - x
>> sage: f.factor()
>> x * (2*x - 1)
>
> Perhaps. I like the R[var] notation because it's a direct translation
> of the mathematical notation.

I love the R[var] notation too.  I remember making it up and being very pleased.

>  Note the default variable name:
>
> sage: t = polygen(ZZ)
> sage: t
> x

yes, that's good to point out.  To make it t:

sage: t = polygen(ZZ,'t')
sage: t
t

William

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