On 2016-10-22 10:37, Ralf Stephan wrote:
|
sage:2*(QQbar(1))
2
sage:2^(QQbar(1))
...
TypeError:nocanonical coercion fromAlgebraicFieldto RationalField
|
Why does the one work, the other not?
Multiplication uses coercion.
Exponentiation does not use coercion, since that's usually not what you
want (Mod(3,5)^7 should not become Mod(3,5)^Mod(2,5)).
If I'm not mistaken, only exponentiation and bitwise operators do not
use coercion for arithmetic (and the latter probably should use coercion).
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