(* Title: HOL/AxClasses/Product.thy ID: $Id$ Author: Markus Wenzel, TU Muenchen *) theory Product = Main: axclass product < "term" consts product :: "'a::product => 'a => 'a" (infixl "[*]" 70) instance bool :: product by intro_classes defs (overloaded) product_bool_def: "x [*] y == x & y" end