luigi_marino2 at alice.it
Fri Jan 2 02:22:17 CST 2009
I noticed that solve does not check roots for tolerance range.
A simple example of this is solve([1/x + 1/y =0 , x*y =0],[x,y]);
Maxima gives the solution x=0,
y=0. How to make Maxima check the roots? Maybe some global flags?
A possible solution:
declare x and y not equal zero
and Maxima finds indeterminate system:
x=%*r and y=-%*r
infact (x+y)/(xy)=x+y (eliminate denominator).
2. Try k=x^2 and solve two equations.
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