Step of Proof: multiply_nat_wf
12,41
postcript
pdf
Inference at
*
2
0
1
3
I
of proof for Lemma
multiply
nat
wf
:
.....upcase..... NILNIL
1.
i
:
2.
j
:
3. 0 <
j
4. ((
j
- 1)
0 )
(0
(
i
* (
j
- 1)))
(
j
0 )
(0
(
i
*
j
))
latex
by D 0
latex
1
:
1:
5.
j
0
1:
0
(
i
*
j
)
2
: .....wf..... NILNIL
2:
(
j
0 )
.
Definitions
Type
,
s
=
t
,
n
*
m
,
n
-
m
,
#$n
,
a
<
b
,
,
,
A
B
,
x
:
A
B
(
x
)
,
i
j
,
P
Q
,
t
T
,
Lemmas
le
wf
,
ge
wf
origin