Jason Grout <[EMAIL PROTECTED]> writes:
> > Why is your coefficients different from mine?
>
>
> I specifically asked for the coefficient of "x". You just asked for the
> coefficients, but didn't specify what variable was the variable of your
> polynomial.
OK, I think I understand now: Sage interprets the x as element of SymbolicRing,
since it does the coercion afterwards...
Being used to FriCAS, I thought that characteristic_polynomial('x') would
return a polynomial in x with coefficients from Symbolic Ring. It doesn't
really, since it coerces the x into an element of SymbolicRing.
Oh dear.
Martin
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