1 files changed, 0 insertions, 79 deletions
diff --git a/vikalpa/ord.scm b/vikalpa/ord.scm
deleted file mode 100644
index 9715979..0000000
--- a/vikalpa/ord.scm
+++ /dev/null
@@ -1,79 +0,0 @@
-;;; Vikalpa --- Prove S-expression
-;;; Copyright © 2020 Masaya Tojo <masaya@tojo.tokyo>
-;;;
-;;; This file is part of Vikalpa.
-;;;
-;;; Vikalpa is free software; you can redistribute it and/or modify it
-;;; under the terms of the GNU General Public License as published by
-;;; the Free Software Foundation; either version 3 of the License, or
-;;; (at your option) any later version.
-;;;
-;;; Vikalpa is distributed in the hope that it will be useful, but
-;;; WITHOUT ANY WARRANTY; without even the implied warranty of
-;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-;;; General Public License for more details.
-;;;
-;;; You should have received a copy of the GNU General Public License
-;;; along with Vikalpa.  If not, see <http://www.gnu.org/licenses/>.
-
-(define-module (vikalpa ord)
-  #:export (ord?
-            ord-fin?
-            ord-inf?
-            ord-first-expt
-            ord-first-coeff
-            ord-rest
-            ord<)
-  #:use-module (vikalpa syntax)
-  #:use-module (vikalpa primitive))
-
-;;; ACL2's O-p
-;; https://www.cs.utexas.edu/users/moore/acl2/manuals/current/manual/index-seo.php/ACL2____O-P?path=3574/6842/3819/225/243
-(define (ord? x)
-  (if (ord-fin? x)
-      (natural? x)
-      (and (pair? (car x))
-           (ord? (ord-first-expt x))
-           (not (eqv? 0 (ord-first-expt x)))
-           (positive? (ord-first-coeff x))
-           (ord< (ord-first-expt (ord-rest x))
-                 (ord-first-expt x)))))
-
-(define/guard (ord (first-expt ord?) (first-coeff positive?) (rest ord?))
-  (cons (cons first-expt first-coeff) rest))
-
-(define (ord-fin? x)
-  (not (pair? x)))
-
-(define (ord-inf? x)
-  (pair? x))
-
-(define (ord-first-expt x)
-  (if (ord-fin? x)
-      0
-      (caar x)))
-
-(define (ord-first-coeff x)
-  (if (ord-fin? x)
-      x
-      (cdar x)))
-
-(define (ord-rest x)
-  (cdr x))
-
-(define (ord< x y)
-  (cond ((ord-fin? x)
-         (or (ord-inf? y)
-             (< x y)))
-        ((ord-fin? y) #f)
-        ((not (equal? (ord-first-expt x)
-                      (ord-first-expt y)))
-         (ord< (ord-first-expt x)
-               (ord-first-expt y)))
-        ((not (= (ord-first-coeff x)
-                 (ord-first-coeff y)))
-         (< (ord-first-coeff x)
-            (ord-first-coeff y)))
-        (else
-         (ord< (ord-rest x)
-               (ord-rest y)))))