%   ORIGINAL: h4/relation/INVOL0
% Assm: HL_TRUTH: T
% Assm: HL_FALSITY: ~F
% Assm: HL_BOOL_CASES: !t. (t <=> T) \/ (t <=> F)
% Assm: HL_EXT: !f g. (!x. f x = g x) ==> f = g
% Assm: h4/bool/TRUTH: T
% Assm: h4/bool/REFL__CLAUSE: !x. x = x <=> T
% Assm: h4/bool/FUN__EQ__THM: !g f. f = g <=> (!x. f x = g x)
% Assm: h4/combin/o__THM: !x g f. h4/combin/o f g x = f (g x)
% Assm: h4/combin/I__THM: !x. h4/combin/I x = x
% Assm: h4/relation/INVOL__DEF: !f. h4/relation/INVOL f <=> h4/combin/o f f = h4/combin/I
% Goal: !f. h4/relation/INVOL f <=> (!x. f (f x) = x)
%   PROCESSED
% Assm [HLu_TRUTH]: T
% Assm [HLu_FALSITY]: ~F
% Assm [HLu_BOOLu_CASES]: !t. (t <=> T) \/ (t <=> F)
% Assm [HLu_EXT]: !f g. (!x. happ f x = happ g x) ==> f = g
% Assm [h4s_bools_TRUTH]: T
% Assm [h4s_bools_REFLu_u_CLAUSE]: !x. x = x <=> T
% Assm [h4s_bools_FUNu_u_EQu_u_THM]: !g f. f = g <=> (!x. happ f x = happ g x)
% Assm [h4s_combins_ou_u_THM]: !x g f. happ (h4/combin/o f g) x = happ f (happ g x)
% Assm [h4s_combins_Iu_u_THM]: !x. happ h4/combin/I x = x
% Assm [h4s_relations_INVOLu_u_DEF]: !f. h4/relation/INVOL f <=> h4/combin/o f f = h4/combin/I
% Goal: !f. h4/relation/INVOL f <=> (!x. happ f (happ f x) = x)
fof(aHLu_TRUTH, axiom, p(s(t_bool,t))).
fof(aHLu_FALSITY, axiom, ~ (p(s(t_bool,f0)))).
fof(aHLu_BOOLu_CASES, axiom, ![V_t]: (s(t_bool,V_t) = s(t_bool,t) | s(t_bool,V_t) = s(t_bool,f0))).
fof(aHLu_EXT, axiom, ![TV_Q264857,TV_Q264853]: ![V_f, V_g]: (![V_x]: s(TV_Q264853,happ(s(t_fun(TV_Q264857,TV_Q264853),V_f),s(TV_Q264857,V_x))) = s(TV_Q264853,happ(s(t_fun(TV_Q264857,TV_Q264853),V_g),s(TV_Q264857,V_x))) => s(t_fun(TV_Q264857,TV_Q264853),V_f) = s(t_fun(TV_Q264857,TV_Q264853),V_g))).
fof(ah4s_bools_TRUTH, axiom, p(s(t_bool,t))).
fof(ah4s_bools_REFLu_u_CLAUSE, axiom, ![TV_u_27a]: ![V_x]: (s(TV_u_27a,V_x) = s(TV_u_27a,V_x) <=> p(s(t_bool,t)))).
fof(ah4s_bools_FUNu_u_EQu_u_THM, axiom, ![TV_u_27b,TV_u_27a]: ![V_g, V_f]: (s(t_fun(TV_u_27a,TV_u_27b),V_f) = s(t_fun(TV_u_27a,TV_u_27b),V_g) <=> ![V_x]: s(TV_u_27b,happ(s(t_fun(TV_u_27a,TV_u_27b),V_f),s(TV_u_27a,V_x))) = s(TV_u_27b,happ(s(t_fun(TV_u_27a,TV_u_27b),V_g),s(TV_u_27a,V_x))))).
fof(ah4s_combins_ou_u_THM, axiom, ![TV_u_27b,TV_u_27a,TV_u_27c]: ![V_x, V_g, V_f]: s(TV_u_27b,happ(s(t_fun(TV_u_27c,TV_u_27b),h4s_combins_o(s(t_fun(TV_u_27a,TV_u_27b),V_f),s(t_fun(TV_u_27c,TV_u_27a),V_g))),s(TV_u_27c,V_x))) = s(TV_u_27b,happ(s(t_fun(TV_u_27a,TV_u_27b),V_f),s(TV_u_27a,happ(s(t_fun(TV_u_27c,TV_u_27a),V_g),s(TV_u_27c,V_x)))))).
fof(ah4s_combins_Iu_u_THM, axiom, ![TV_u_27a]: ![V_x]: s(TV_u_27a,happ(s(t_fun(TV_u_27a,TV_u_27a),h4s_combins_i),s(TV_u_27a,V_x))) = s(TV_u_27a,V_x)).
fof(ah4s_relations_INVOLu_u_DEF, axiom, ![TV_u_27z]: ![V_f]: (p(s(t_bool,h4s_relations_invol(s(t_fun(TV_u_27z,TV_u_27z),V_f)))) <=> s(t_fun(TV_u_27z,TV_u_27z),h4s_combins_o(s(t_fun(TV_u_27z,TV_u_27z),V_f),s(t_fun(TV_u_27z,TV_u_27z),V_f))) = s(t_fun(TV_u_27z,TV_u_27z),h4s_combins_i))).
fof(ch4s_relations_INVOL0, conjecture, ![TV_u_27z]: ![V_f]: (p(s(t_bool,h4s_relations_invol(s(t_fun(TV_u_27z,TV_u_27z),V_f)))) <=> ![V_x]: s(TV_u_27z,happ(s(t_fun(TV_u_27z,TV_u_27z),V_f),s(TV_u_27z,happ(s(t_fun(TV_u_27z,TV_u_27z),V_f),s(TV_u_27z,V_x))))) = s(TV_u_27z,V_x))).
