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;; Example 3.34
#lang racket
(require "test_constraints.scm")
(define (squarer a b)
(multiplier a a b))
(define A (make-connector))
(define B (make-connector))
(squarer A B)
(probe "resa" A)
(probe "resb" B)
;(set-value! A 14 'user)
(set-value! B 15 'user)
;; set-val b
;; in multiplier:
;; in order to compute the equation x = y * z we need to know values of 2 variables
;; but there is only 1 (b).
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