(7steps total) PrintForm Definitions Lemmas num thy 1 Sections StandardLIB Doc
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At: gcd sat pred 1 1
1. b : 
2. b1:. |b1|<|b|  (a:. GCD(a;b1;gcd(a;b1)))
3. a : 
4. b = 0
  GCD(a;b;a)
By: (HypSubst 4 0) THEN (BackThru Thm* a:. GCD(a;0;a))

Generated subgoals:

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intnatural_numberless_thanequalimpliesall
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(7steps total) PrintForm Definitions Lemmas num thy 1 Sections StandardLIB Doc