1 665c255d 2023-08-04 jrmu ;; Exercise 3.39.  Which of the five possibilities in the parallel execution shown above remain if we instead serialize execution as follows:
 2 665c255d 2023-08-04 jrmu 
 3 665c255d 2023-08-04 jrmu (define x 10)
 4 665c255d 2023-08-04 jrmu (define s (make-serializer))
 5 665c255d 2023-08-04 jrmu (parallel-execute (lambda () (set! x ((s (lambda () (* x x))))))
 6 665c255d 2023-08-04 jrmu 		  (s (lambda () (set! x (+ x 1)))))
 7 665c255d 2023-08-04 jrmu 
 8 665c255d 2023-08-04 jrmu ;; 101
 9 665c255d 2023-08-04 jrmu ;; 121
10 665c255d 2023-08-04 jrmu ;; 100