On Friday 26 April 2002 15:03, Raymond Toy wrote:
> >>>>> "Wolfgang" == Wolfgang Jenkner <wjenkner@inode.at> writes:
>
> Wolfgang> (C4) asksign(log(x));
> Wolfgang> Is x positive or negative?
>
> Wolfgang> neg;
> Wolfgang> (D4) PNZ
>
> Shouldn't maxima say something else since the sign of a complex number
> isn't well defined?
>
> Ray
Worse: shouldn't maxima never give a false answer, even if some hidden
switch is set to false? (The bug is
(C4) asksign(log(-1));
(D4) NEG
).
Jürgen