doc-src/Tutorial/Misc/Defs.thy

method 'induct' now handles non-atomic goals;
improved error message;
option 'stripped' deprecated;

Defs = Types +
consts nand, exor :: gate
defs nand_def "nand A B == ~(A & B)"
     exor_def "exor A B == A & ~B | ~A & B"
end