Step |
Hyp |
Ref |
Expression |
1 |
|
salpreimagelt.x |
|
2 |
|
salpreimagelt.a |
|
3 |
|
salpreimagelt.s |
|
4 |
|
salpreimagelt.u |
|
5 |
|
salpreimagelt.b |
|
6 |
|
salpreimagelt.p |
|
7 |
|
salpreimagelt.c |
|
8 |
4
|
eqcomi |
|
9 |
8
|
a1i |
|
10 |
9
|
difeq1d |
|
11 |
7
|
rexrd |
|
12 |
1 5 11
|
preimagelt |
|
13 |
10 12
|
eqtr2d |
|
14 |
7
|
ancli |
|
15 |
|
nfcv |
|
16 |
15
|
nfel1 |
|
17 |
2 16
|
nfan |
|
18 |
|
nfv |
|
19 |
17 18
|
nfim |
|
20 |
|
eleq1 |
|
21 |
20
|
anbi2d |
|
22 |
|
breq1 |
|
23 |
22
|
rabbidv |
|
24 |
23
|
eleq1d |
|
25 |
21 24
|
imbi12d |
|
26 |
19 25 6
|
vtoclg1f |
|
27 |
7 14 26
|
sylc |
|
28 |
3 27
|
saldifcld |
|
29 |
13 28
|
eqeltrd |
|