changeset 31953 | eeb8a300f362 |
parent 30047 | 46c88406e6c0 |
child 32479 | 521cc9bf2958 |
--- a/src/HOL/Extraction/Euclid.thy Tue Jul 07 17:39:51 2009 +0200 +++ b/src/HOL/Extraction/Euclid.thy Tue Jul 07 20:16:06 2009 +0200 @@ -189,7 +189,7 @@ assume pn: "p \<le> n" from `prime p` have "0 < p" by (rule prime_g_zero) then have "p dvd n!" using pn by (rule dvd_factorial) - with dvd have "p dvd ?k - n!" by (rule nat_dvd_diff) + with dvd have "p dvd ?k - n!" by (rule dvd_diff_nat) then have "p dvd 1" by simp with prime show False using prime_nd_one by auto qed