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Changeset 58 for branches/f4grobner


Ignore:
Timestamp:
2015-06-05T11:19:55-07:00 (10 years ago)
Author:
Marek Rychlik
Message:

* empty log message *

File:
1 edited

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  • branches/f4grobner/polynomial.lisp

    r57 r58  
    225225  (reduce (ring-gcd ring) (mapcar #'term-coeff (rest (poly-termlist p))) :initial-value (poly-lc p)))
    226226
    227 (defun buchberger-criterion (ring g)
    228   "Returns T if G is a Grobner basis, by using the Buchberger
    229 criterion: for every two polynomials h1 and h2 in G the S-polynomial
    230 S(h1,h2) reduces to 0 modulo G."
    231   (every
    232    #'poly-zerop
    233    (makelist (normal-form ring (spoly ring (elt g i) (elt g j)) g nil)
    234              (i 0 (- (length g) 2))
    235              (j (1+ i) (1- (length g))))))
    236 
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