Step |
Hyp |
Ref |
Expression |
1 |
|
sltval2 |
|
2 |
|
fvex |
|
3 |
|
fvex |
|
4 |
2 3
|
brtp |
|
5 |
|
fvprc |
|
6 |
|
1n0 |
|
7 |
6
|
neii |
|
8 |
|
eqeq1 |
|
9 |
|
eqcom |
|
10 |
8 9
|
bitrdi |
|
11 |
7 10
|
mtbiri |
|
12 |
5 11
|
syl |
|
13 |
12
|
con4i |
|
14 |
13
|
adantr |
|
15 |
13
|
adantr |
|
16 |
|
fvprc |
|
17 |
|
2on0 |
|
18 |
17
|
neii |
|
19 |
|
eqeq1 |
|
20 |
|
eqcom |
|
21 |
19 20
|
bitrdi |
|
22 |
18 21
|
mtbiri |
|
23 |
16 22
|
syl |
|
24 |
23
|
con4i |
|
25 |
24
|
adantl |
|
26 |
14 15 25
|
3jaoi |
|
27 |
4 26
|
sylbi |
|
28 |
1 27
|
syl6bi |
|