Changeset 3084
- Timestamp:
- 2015-06-21T20:40:29-07:00 (10 years ago)
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- 1 edited
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branches/f4grobner/polynomial.lisp
r3083 r3084 294 294 295 295 296 (defun poly-standard-extension (plist &aux (k (length plist)) (i 0))296 (defun standard-extension (plist &aux (k (length plist)) (i 0)) 297 297 "Calculate [U1*P1,U2*P2,...,UK*PK], where PLIST=[P1,P2,...,PK] 298 298 is a list of polynomials. Destructively modifies PLIST elements." … … 306 306 (t (monom-dimension (leading-term poly))))) 307 307 308 (defun s aturation-extension(plist308 (defun standard-extension-1 (plist 309 309 &aux 310 310 (k (length plist)) … … 312 312 (nvars (poly-dimension (car plist)))) 313 313 "Calculate [U1*P1-1,U2*P2-1,...,UK*PK-1], where PLIST=[P1,P2,...,PK]. 314 The polynomials in F are destructively modified by inserting k variables 315 at the beginning." 314 Firstly, new K variables U1, U2, ..., UK, are inserted at the 315 beginning of each polynomial. Subsequently, P1, P2, ..., PK are 316 destructively modified tantamount to replacing PI with UI*PI-1." 316 317 (flet ((subtract-1 (p) 317 318 (append-item p (make-instance 'term :coeff -1 :dimension (+ k nvars)))))
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