%   ORIGINAL: 'h4/thm/arithmetic/INV_PRE_EQ_'
% 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: !m n. 'h4/const/prim_rec/<' 'h4/const/num/0' m /\ 'h4/const/prim_rec/<' 'h4/const/num/0' n ==> ('h4/const/prim_rec/PRE' m = 'h4/const/prim_rec/PRE' n <=> m = n)
%   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: !m n. 'h4/const/prim_rec/<' 'h4/const/num/0' m /\ 'h4/const/prim_rec/<' 'h4/const/num/0' n ==> ('h4/const/prim_rec/PRE' m = 'h4/const/prim_rec/PRE' n <=> m = n)
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_3f78366,V_3f78362]: ![F, G]: (![X]: s(V_3f78362,happ(s(fun(V_3f78366,V_3f78362),F),s(V_3f78366,X))) = s(V_3f78362,happ(s(fun(V_3f78366,V_3f78362),G),s(V_3f78366,X))) => s(fun(V_3f78366,V_3f78362),F) = s(fun(V_3f78366,V_3f78362),G))).
fof('h4/thm/arithmetic/INV_PRE_EQ_', conjecture, ![M, N]: ((p(s(bool,'h4/const/prim_rec/<'(s('h4/type/num/num','h4/const/num/0'),s('h4/type/num/num',M)))) & p(s(bool,'h4/const/prim_rec/<'(s('h4/type/num/num','h4/const/num/0'),s('h4/type/num/num',N))))) => (s('h4/type/num/num','h4/const/prim_rec/PRE'(s('h4/type/num/num',M))) = s('h4/type/num/num','h4/const/prim_rec/PRE'(s('h4/type/num/num',N))) <=> s('h4/type/num/num',M) = s('h4/type/num/num',N)))).
