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At:
coprime divisors prod1111 1. a1 : 2. a2 : 3. b : 4. c1 : 5. b = a1c1 6. c2 : 7. b = a2c2 8. x : 9. y : 10. a1x+a2y = 1
c:. b = a1a2c
By:
(Using [`n',b] (FwdThru Thm* a,b,n:. a = bna = nb [10])) THEN (Thin 10)
THEN
(ArithSimp 10)