[1] | 1 | head 1.4;
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| 2 | access;
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| 3 | symbols;
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| 4 | locks; strict;
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| 5 | comment @;;; @;
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| 6 |
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| 7 |
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| 8 | 1.4
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| 9 | date 2009.01.22.04.08.39; author marek; state Exp;
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| 10 | branches;
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| 11 | next 1.3;
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| 12 |
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| 13 | 1.3
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| 14 | date 2009.01.19.09.31.48; author marek; state Exp;
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| 15 | branches;
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| 16 | next 1.2;
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| 17 |
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| 18 | 1.2
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| 19 | date 2009.01.19.07.39.39; author marek; state Exp;
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| 20 | branches;
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| 21 | next 1.1;
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| 22 |
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| 23 | 1.1
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| 24 | date 2009.01.19.06.45.58; author marek; state Exp;
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| 25 | branches;
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| 26 | next ;
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| 27 |
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| 28 |
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| 29 | desc
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| 30 | @@
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| 31 |
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| 32 |
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| 33 | 1.4
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| 34 | log
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| 35 | @*** empty log message ***
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| 36 | @
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| 37 | text
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| 38 | @#|
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| 39 | $Id$
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| 40 | *--------------------------------------------------------------------------*
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| 41 | | Copyright (C) 1994, Marek Rychlik (e-mail: rychlik@@math.arizona.edu) |
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| 42 | | Department of Mathematics, University of Arizona, Tucson, AZ 85721 |
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| 43 | | |
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| 44 | | Everyone is permitted to copy, distribute and modify the code in this |
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| 45 | | directory, as long as this copyright note is preserved verbatim. |
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| 46 | *--------------------------------------------------------------------------*
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| 47 | |#
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| 48 |
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| 49 | (defpackage "TERM"
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| 50 | (:use "MONOM" "COEFFICIENT-RING" "COMMON-LISP")
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| 51 | (:export term-divides-p term* term/ term-coefficient term-monom monom-times-term))
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| 52 |
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| 53 | (in-package "TERM")
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| 54 |
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| 55 | #+debug(proclaim '(optimize (speed 0) (debug 3)))
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| 56 | #-debug(proclaim '(optimize (speed 3) (debug 0)))
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| 57 |
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| 58 | ;;----------------------------------------------------------------
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| 59 | ;; Basic operations on terms
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| 60 | ;;----------------------------------------------------------------
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| 61 | ;; THE REPRESENTATION: Terms are cons cells consisting
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| 62 | ;; of a monom and coefficient
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| 63 | ;;
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| 64 | ;; term: (monom . coefficient)
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| 65 | ;;
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| 66 | ;;----------------------------------------------------------------
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| 67 | ;; EXAMPLES: Suppose that variables are x and y. Then
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| 68 | ;; Term 3*x*y^2 ---> ((1 2) . 3)
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| 69 | ;;----------------------------------------------------------------
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| 70 |
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| 71 | ;; Multiplication of terms
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| 72 | (defun term* (term1 term2 &optional (ring *coefficient-ring*))
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| 73 | (cons
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| 74 | (monom* (car term1) (car term2))
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| 75 | (funcall (ring-* ring) (cdr term1) (cdr term2))))
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| 76 |
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| 77 | ;;;; Division of terms
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| 78 | (defun term/ (term1 term2 &optional (ring *coefficient-ring*))
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| 79 | (cons
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| 80 | (monom/ (car term1) (car term2))
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| 81 | (funcall (ring-/ ring) (cdr term1) (cdr term2))))
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| 82 |
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| 83 | ;; Multiply monomial by term
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| 84 | (defun monom-times-term (m term)
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| 85 | (cons (monom* m (car term)) (cdr term)))
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| 86 |
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| 87 | ;; Whether a term divides another term
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| 88 | (defun term-divides-p (term1 term2)
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| 89 | (monom-divides-p (car term1) (car term2)))
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| 90 |
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| 91 | ;; Accessor functions
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| 92 | (defmacro term-monom (term) `(car ,term))
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| 93 | (defmacro term-coefficient (term) `(cdr ,term))
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| 94 |
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| 95 | ;; Setf methods
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| 96 | (defsetf term-monom (term) (monom)
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| 97 | `(setf (car ,term) ,monom))
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| 98 |
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| 99 | (defsetf term-coefficient (term) (coefficient)
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| 100 | `(setf (cdr ,term) ,coefficient))
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| 101 |
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| 102 | @
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| 103 |
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| 104 |
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| 105 | 1.3
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| 106 | log
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| 107 | @*** empty log message ***
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| 108 | @
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| 109 | text
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| 110 | @d18 2
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| 111 | a19 2
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| 112 | ;;(proclaim '(optimize (speed 0) (debug 3)))
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| 113 | (proclaim '(optimize (speed 3) (debug 0)))
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| 114 | @
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| 115 |
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| 116 |
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| 117 | 1.2
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| 118 | log
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| 119 | @*** empty log message ***
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| 120 | @
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| 121 | text
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| 122 | @d18 2
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| 123 | a19 1
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| 124 | (proclaim '(optimize (speed 0) (debug 3)))
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| 125 | @
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| 126 |
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| 127 |
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| 128 | 1.1
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| 129 | log
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| 130 | @Initial revision
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| 131 | @
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| 132 | text
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| 133 | @d2 1
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| 134 | a2 1
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| 135 | $Id: term.lisp,v 1.30 1997/11/28 23:23:30 marek Exp $
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| 136 | d15 1
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| 137 | d17 3
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| 138 | a32 4
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| 139 | (eval-when (compile)
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| 140 | (proclaim '(optimize (speed 3) (safety 0)))
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| 141 | (proclaim '(inline term-divides-p term* term/)))
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| 142 |
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| 143 | @
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