Hi sage developers,
I need to play with polynomials on various kind of coefficients. So I tried
the following:
----------------------------------------------------------------------
| Sage Version 4.1.1, Release Date: 2009-08-14 |
| Type notebook() for the GUI, and license() for information. |
----------------------------------------------------------------------
Loading Sage library. Current Mercurial branch is: combinat
sage: R=QQ[x]
sage: R(1+x)
x + 1
sage: R=ZZ[x]
sage: R(1+x)
x + 1
sage: R=RealField(200)[x]
sage: R(1+x)
---------------------------------------------------------------------------
TypeError Traceback (most recent call last)
[...]
TypeError: x is not a variable of Univariate Polynomial Ring in x over Real
Field with 200 bits of precision
sage:
As mvngu pointed out on irc: the following works
sage: R.<x> = RealField(20)["x"]
sage: R(1 + x)
1.0000*x + 1.0000
But this is not very beautiful and worse it is very inconsistent...
At least the error message should be more understandable...
What should we do about it ?
Cheers,
Florent
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