
<A NAME=requirements>

<TITLE>requirements</TITLE></A>
<b><a href=r37_idx.html>INDEX</a></b><p><p>



<B>REQUIREMENTS</B> _ _ _  _ _ _  _ _ _  _ _ _ <B>variable</B><P>
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After an attempt to solve an inconsistent equation system 
with parameters, the variable <em>requirements</em> contains a list 
of expressions. These expressions define a set of conditions implicitly 
equated with zero. Any solution to this system defines a setting for 
the parameters sufficient to make the original system consistent. 
 <P> <H3> 
examples: </H3>
<P><PRE><TT>
solve({x-a,x-y,y-1},{x,y}); 

  {}


requirements;

  {a - 1}

</TT></PRE><P><P>
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