%   ORIGINAL: 'h4/thm/pred_set/SET_EQ_SUBSET_'
% 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
% Goal: !s1 s2. s1 = s2 <=> 'h4/const/pred_set/SUBSET' s1 s2 /\ 'h4/const/pred_set/SUBSET' s2 s1
%   PROCESSED
% Assm ['HL_TRUTH']: T
% Assm ['HL_FALSITY']: ~F
% Assm ['HL_BOOL_CASES']: !t. (t <=> T) \/ (t <=> F)
% Assm ['HL_EXT']: !f g. (!x. happ f x = happ g x) ==> f = g
% Goal: !s1 s2. s1 = s2 <=> 'h4/const/pred_set/SUBSET' s1 s2 /\ 'h4/const/pred_set/SUBSET' s2 s1
fof('HL_TRUTH', axiom, p(s(bool,'T'))).
fof('HL_FALSITY', axiom, ~ (p(s(bool,'F')))).
fof('HL_BOOL_CASES', axiom, ![T]: (s(bool,T) = s(bool,'T') | s(bool,T) = s(bool,'F'))).
fof('HL_EXT', axiom, ![V_3f23977,V_3f23973]: ![F, G]: (![X]: s(V_3f23973,happ(s(fun(V_3f23977,V_3f23973),F),s(V_3f23977,X))) = s(V_3f23973,happ(s(fun(V_3f23977,V_3f23973),G),s(V_3f23977,X))) => s(fun(V_3f23977,V_3f23973),F) = s(fun(V_3f23977,V_3f23973),G))).
fof('h4/thm/pred_set/SET_EQ_SUBSET_', conjecture, ![A]: ![S1, S2]: (s(fun(A,bool),S1) = s(fun(A,bool),S2) <=> (p(s(bool,'h4/const/pred_set/SUBSET'(s(fun(A,bool),S1),s(fun(A,bool),S2)))) & p(s(bool,'h4/const/pred_set/SUBSET'(s(fun(A,bool),S2),s(fun(A,bool),S1))))))).
