Step of Proof: complete_nat_ind_with_y
12,41
postcript
pdf
Inference at
*
1
1
2
1
1
2
1
1
1
I
of proof for Lemma
complete
nat
ind
with
y
:
1.
P
:
{k}
2.
g
:
i
:
. (
j
:
i
.
P
(
j
))
P
(
i
)
3. Y(
f
,
x
.
g
(
x
,
f
))
Void
Void
4.
n
:
5. 0 <
n
6. Y(
f
,
x
.
g
(
x
,
f
))
(
m
:
(
n
- 1).
P
(
m
))
7.
r
:
n
8.
r
= (
n
- 1)
g
(
r
,Y(
f
,
x
.
g
(
x
,
f
)))
P
(
r
)
latex
by MemberEqCD
latex
1
: .....subterm..... T:t1:n
1:
g
(
r
)
(
j
:
r
.
P
(
j
))
P
(
r
)
2
: .....subterm..... T:t2:n
2:
Y(
f
,
x
.
g
(
x
,
f
))
(
j
:
r
.
P
(
j
))
.
Definitions
t
T
origin