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src/HOL/ex/StringEx.ML
author oheimb
Thu, 01 Feb 2001 20:51:48 +0100
changeset 11025 a70b796d9af8
parent 8035 84c5ce912b43
permissions -rw-r--r--
converted to Isar therory, adding attributes complete_split and split_format


Goal "hd(''ABCD'') = CHR ''A''";
by (Simp_tac 1);
qed "";

Goal "hd(''ABCD'') ~= CHR ''B''";
by (Simp_tac 1);
qed "";

Goal "''ABCD'' ~= ''ABCX''";
by (Simp_tac 1);
qed "";

Goal "''ABCD'' = ''ABCD''";
by (Simp_tac 1);
qed "";

Goal "''ABCDEFGHIJKLMNOPQRSTUVWXYZ'' ~= ''ABCDEFGHIJKLMNOPQRSTUVWXY''";
by (Simp_tac 1);
qed "";
isabelle