%   ORIGINAL: 'h4/thm/real/SUM_CANCEL_'
% 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: !f n d. 'h4/const/real/sum' ('h4/const/pair/,' n d) (\n0. 'h4/const/real/real_sub' (f ('h4/const/num/SUC' n0)) (f n0)) = 'h4/const/real/real_sub' (f ('h4/const/arithmetic/+' n d)) (f 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: !_0. (!f n0. happ (happ _0 f) n0 = 'h4/const/real/real_sub' (happ f ('h4/const/num/SUC' n0)) (happ f n0)) ==> (!f n d. 'h4/const/real/sum' ('h4/const/pair/,' n d) (happ _0 f) = 'h4/const/real/real_sub' (happ f ('h4/const/arithmetic/+' n d)) (happ f 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_3f94694,V_3f94690]: ![F, G]: (![X]: s(V_3f94690,happ(s(fun(V_3f94694,V_3f94690),F),s(V_3f94694,X))) = s(V_3f94690,happ(s(fun(V_3f94694,V_3f94690),G),s(V_3f94694,X))) => s(fun(V_3f94694,V_3f94690),F) = s(fun(V_3f94694,V_3f94690),G))).
fof('h4/thm/real/SUM_CANCEL_', conjecture, ![V__0]: (![F, N0]: s('h4/type/realax/real',happ(s(fun('h4/type/num/num','h4/type/realax/real'),happ(s(fun(fun('h4/type/num/num','h4/type/realax/real'),fun('h4/type/num/num','h4/type/realax/real')),V__0),s(fun('h4/type/num/num','h4/type/realax/real'),F))),s('h4/type/num/num',N0))) = s('h4/type/realax/real','h4/const/real/real_sub'(s('h4/type/realax/real',happ(s(fun('h4/type/num/num','h4/type/realax/real'),F),s('h4/type/num/num','h4/const/num/SUC'(s('h4/type/num/num',N0))))),s('h4/type/realax/real',happ(s(fun('h4/type/num/num','h4/type/realax/real'),F),s('h4/type/num/num',N0))))) => ![F, N, D]: s('h4/type/realax/real','h4/const/real/sum'(s('h4/type/pair/prod'('h4/type/num/num','h4/type/num/num'),'h4/const/pair/,'(s('h4/type/num/num',N),s('h4/type/num/num',D))),s(fun('h4/type/num/num','h4/type/realax/real'),happ(s(fun(fun('h4/type/num/num','h4/type/realax/real'),fun('h4/type/num/num','h4/type/realax/real')),V__0),s(fun('h4/type/num/num','h4/type/realax/real'),F))))) = s('h4/type/realax/real','h4/const/real/real_sub'(s('h4/type/realax/real',happ(s(fun('h4/type/num/num','h4/type/realax/real'),F),s('h4/type/num/num','h4/const/arithmetic/+'(s('h4/type/num/num',N),s('h4/type/num/num',D))))),s('h4/type/realax/real',happ(s(fun('h4/type/num/num','h4/type/realax/real'),F),s('h4/type/num/num',N))))))).
