src/HOL/ex/StringEx.ML
author nipkow
Fri, 24 Nov 2000 16:49:27 +0100
changeset 10519 ade64af4c57c
parent 8035 84c5ce912b43
permissions -rw-r--r--
hide many names from Datatype_Universe.


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 "";