
<A NAME=groebrestriction>

<TITLE>groebrestriction</TITLE></A>
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<B>GROEBRESTRICTION</B> _ _ _  _ _ _  _ _ _  _ _ _ <B>variable</B><P>
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During 
<A HREF=r37_0390.html>groebnerf</A> calculations 
irrelevant branches can be excluded 
by setting the variable <em>groebrestriction</em>. The 
following restrictions are implemented: 
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syntax: </H3>
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<em>groebrestriction</em>:= <em>nonnegative</em> 
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<em>groebrestriction</em>:= <em>positive</em> 
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<em>groebrestriction</em>:= <em>zeropoint</em> 
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With <em>nonnegative</em> branches are excluded where one 
polynomial has no nonnegative real zeros; with <em>positive</em> 
the restriction is sharpened to positive zeros only. 
The restriction <em>zeropoint</em> excludes all branches 
which do not have the origin (0,0,...0) in their solution 
set. 
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