/a + (b + 1)
u
=
(a + b) + 1/ & /a + (b + (c + 1))
v
=
(a + (b + c)) + 1/ & /(a + b) + (c + 1)
w
=
((a + b) + c) + 1/ .≝. a + (b + c).I.(a + b) + c …U)
und allgemein:

/f1(1)
r
=
f2(1)/ & /f1(c + 1)
v
=
f1(c + 1)/ & /f2(c + 1)
w
=
f2(c + 1)/ .≝. f1(c).I.f2(c) …V).