# File Asig.ML

    (*  Title:      HOL/IOA/Asig.ML
        ID:         $Id: Asig.ML,v 1.6 2005/09/06 17:03:39 wenzelm Exp $
        Author:     Tobias Nipkow & Konrad Slind
        Copyright   1994  TU Muenchen
    *)

    bind_thms ("asig_projections", [asig_inputs_def, asig_outputs_def, asig_internals_def]);

    Goal "[| a~:internals(S) ;a~:externals(S)|] ==> a~:actions(S)";
    by (asm_full_simp_tac (simpset() addsimps [externals_def,actions_def]) 1);
    qed"int_and_ext_is_act";

    Goal "[|a:externals(S)|] ==> a:actions(S)";
    by (asm_full_simp_tac (simpset() addsimps [externals_def,actions_def]) 1);
    qed"ext_is_act";