Step |
Hyp |
Ref |
Expression |
1 |
|
preimagelt.x |
|
2 |
|
preimagelt.b |
|
3 |
|
preimagelt.c |
|
4 |
|
nfcv |
|
5 |
|
nfrab1 |
|
6 |
4 5
|
nfdif |
|
7 |
|
nfrab1 |
|
8 |
|
eldifi |
|
9 |
8
|
adantl |
|
10 |
|
eldifn |
|
11 |
8
|
anim1i |
|
12 |
|
rabid |
|
13 |
11 12
|
sylibr |
|
14 |
10 13
|
mtand |
|
15 |
14
|
adantl |
|
16 |
8 2
|
sylan2 |
|
17 |
3
|
adantr |
|
18 |
16 17
|
xrltnled |
|
19 |
15 18
|
mpbird |
|
20 |
|
rabid |
|
21 |
9 19 20
|
sylanbrc |
|
22 |
|
rabidim1 |
|
23 |
22
|
adantl |
|
24 |
|
rabidim2 |
|
25 |
24
|
adantl |
|
26 |
22 2
|
sylan2 |
|
27 |
3
|
adantr |
|
28 |
26 27
|
xrltnled |
|
29 |
25 28
|
mpbid |
|
30 |
29
|
intnand |
|
31 |
30 12
|
sylnibr |
|
32 |
23 31
|
eldifd |
|
33 |
21 32
|
impbida |
|
34 |
1 6 7 33
|
eqrd |
|