Step of Proof: inv_image_ind_tp
9,38
postcript
pdf
Inference at
*
1
I
of proof for Lemma
inv
image
ind
tp
:
1.
T
: Type
2.
r
:
T
T
3.
S
: Type
4.
f
:
S
T
5. WellFnd{i}(
T
;
x
,
y
.
r
(
x
,
y
))
WellFnd{i}(
S
;
x
,
y
.
r
(
f
(
x
),
f
(
y
)))
latex
by UnfoldTopAb 0
latex
1
:
1:
P
:(
S
). (
j
:
S
. (
k
:
S
.
r
(
f
(
k
),
f
(
j
))
P
(
k
))
P
(
j
))
{
n
:
S
.
P
(
n
)}
.
Definitions
WellFnd{i}(
A
;
x
,
y
.
R
(
x
;
y
))
origin