Bugs item #769988, was opened at 20030711 23:22
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Category: None
Group: None
Status: Open
Resolution: None
Priority: 5
Submitted By: Stavros Macrakis (macrakis)
Assigned to: Nobody/Anonymous (nobody)
Summary: Warning for nonpolynomial algsys
Initial Comment:
Solve for multiple variables calls Algsys. As it says
(clearly!) in the documentation, this only works for
polynomial equations.
It would be useful, I think, if we would give a warning
(or an error?) when a nonpolynomial equation were
passed to algsys, e.g.
(C1) solve(sqrt(a^2+b^2)=0,[a,b])
Warning: Solve/Algsys can only solve for multiple
variables when the equations are polynomial. The
equation sqrt(a^2+b^2)=0 is not polynomial.
(D1) []
This is a common beginner's error, I think, encouraged of
course by the fact that the command is called "solve" 
you'd think it could solve any simple equation....

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