Difference between revisions of "ApCoCoA1:BB.BBasisForOI"
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m (ApCoCoA:Borderbasis.BorderBasis moved to ApCoCoA:BB.BorderBasis: new alias) 
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Revision as of 20:35, 8 November 2007
BB.BorderBasis
border basis of an ideal
Syntax
BB.BorderBasis(F:LIST,OO:LIST):LIST
Description
Computes the border basis of the ideal <formula>I=<F></formula> with respect to the order ideal OO. Gives an error messages if no border basis exists. Uses the <formula>O_{\sigma}(I)</formula> border basis and the border basis transformation algorithm. The inputs are a list of polynomials F and a list OO of terms that specify an order ideal. The output is a list of polynomials.
Example
Use Q[x,y]; BB.BorderBasis([x^2, xy + y^2], [1,x,y,y^2]); [xy + y^2, x^2, y^3, xy^2] 