| By: |
((FwdThru ((Thm* ((Thm* GCD(a;b;x) ((Thm* ((Thm* GCD(x;c;y) ((Thm* ((Thm* y | a & y | b & y | c & ( (([5;8])) THEN (Simple ((FwdThru ((Thm* ((Thm* GCD(a;b;x) ((Thm* ((Thm* GCD(x;c;y) ((Thm* ((Thm* y | a & y | b & y | c & ( (([10;11])) THEN RepD |
| 1 |
13. y | b 14. y | c 15. 16. z | c 17. z | b 18. z | a 19. | 1 step |
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