(C3) asksign(log(x));
Is x - 1 positive, negative, or zero?
neg;
(D3) NEG
(C4) asksign(log(-1));
(D4) NEG
Now
(C5) describe(askexp);
Info from file /usr/local/info/maxima.info:
- Variable: ASKEXP
default: [] contains the expression upon which ASKSIGN is called.
A user may enter a MACSYMA break with ^A and inspect this
expression in order to answer questions asked by ASKSIGN.
(D5) FALSE
My maxima doesn't go into any break with ^A, so I used Ctrl-C (is ^A the same
as Ctrl-A)
(C6)
*** - Ctrl-C: User break
1. Break [1]> askexp;
*** - EVAL: variable ASKEXP has no value
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