%   ORIGINAL: 'h4/thm/arithmetic/SUB_EQ_EQ_0_'
% 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/arithmetic/-' m n = m <=> m = 'h4/const/num/0' \/ n = 'h4/const/num/0'
%   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/arithmetic/-' m n = m <=> m = 'h4/const/num/0' \/ n = 'h4/const/num/0'
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_3f79266,V_3f79262]: ![F, G]: (![X]: s(V_3f79262,happ(s(fun(V_3f79266,V_3f79262),F),s(V_3f79266,X))) = s(V_3f79262,happ(s(fun(V_3f79266,V_3f79262),G),s(V_3f79266,X))) => s(fun(V_3f79266,V_3f79262),F) = s(fun(V_3f79266,V_3f79262),G))).
fof('h4/thm/arithmetic/SUB_EQ_EQ_0_', conjecture, ![M, N]: (s('h4/type/num/num','h4/const/arithmetic/-'(s('h4/type/num/num',M),s('h4/type/num/num',N))) = s('h4/type/num/num',M) <=> (s('h4/type/num/num',M) = s('h4/type/num/num','h4/const/num/0') | s('h4/type/num/num',N) = s('h4/type/num/num','h4/const/num/0')))).
