Step |
Hyp |
Ref |
Expression |
1 |
|
elntg.1 |
|
2 |
|
elntg.2 |
|
3 |
|
lngid |
|
4 |
|
fvex |
|
5 |
4
|
a1i |
|
6 |
|
eengstr |
|
7 |
|
structn0fun |
|
8 |
6 7
|
syl |
|
9 |
|
structcnvcnv |
|
10 |
6 9
|
syl |
|
11 |
10
|
funeqd |
|
12 |
8 11
|
mpbird |
|
13 |
|
opex |
|
14 |
13
|
prid2 |
|
15 |
|
elun2 |
|
16 |
14 15
|
ax-mp |
|
17 |
|
eengv |
|
18 |
16 17
|
eleqtrrid |
|
19 |
|
fvex |
|
20 |
19
|
difexi |
|
21 |
19 20
|
mpoex |
|
22 |
21
|
a1i |
|
23 |
3 5 12 18 22
|
strfv2d |
|
24 |
|
eengbas |
|
25 |
24 1
|
eqtr4di |
|
26 |
25
|
difeq1d |
|
27 |
26
|
adantr |
|
28 |
25
|
adantr |
|
29 |
|
simpll |
|
30 |
|
simplrl |
|
31 |
29 25
|
syl |
|
32 |
30 31
|
eleqtrd |
|
33 |
|
simplrr |
|
34 |
33
|
eldifad |
|
35 |
34 31
|
eleqtrd |
|
36 |
|
simpr |
|
37 |
36 31
|
eleqtrd |
|
38 |
29 1 2 32 35 37
|
ebtwntg |
|
39 |
29 1 2 37 35 32
|
ebtwntg |
|
40 |
29 1 2 32 37 35
|
ebtwntg |
|
41 |
38 39 40
|
3orbi123d |
|
42 |
28 41
|
rabeqbidva |
|
43 |
25 27 42
|
mpoeq123dva |
|
44 |
23 43
|
eqtr3d |
|