<A NAME=ARBVARS>
<TITLE>ARBVARS</TITLE></A>
<b><a href=r37_idx.html>INDEX</a></b><p><p>
<B>ARBVARS</B> _ _ _ _ _ _ _ _ _ _ _ _ <B>switch</B><P>
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When <em>arbvars</em> is on, the solutions of singular or underdetermined
systems of equations are presented in terms of arbitrary complex variables
(see
<A HREF=r37_0139.html>arbcomplex</A>). Otherwise, the solution is parametrized i
n
terms of some of the input variables. Default is <em>on</em>.
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examples: </H3>
<P><PRE><TT>
solve({2x + y,4x + 2y},{x,y});
arbcomplex(1)
{{x= - -------------,y=arbcomplex(1)}}
2
solve({sqrt(x)+ y**3-1},{x,y});
6 3
{{y=arbcomplex(2),x=y - 2*y + 1}}
off arbvars;
solve({2x + y,4x + 2y},{x,y});
y
{{x= - -}}
2
solve({sqrt(x)+ y**3-1},{x,y});
6 3
{{x=y - 2*y + 1}}
</TT></PRE><P>With <em>arbvars</em> off, the return value <em>{{}}</em> means th
at the
equations given to
<A HREF=r37_0179.html>solve</A> imply no relation among the input
variables.
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