Step | Hyp | Ref
| Expression |
1 | | df-op 4567 |
. . . . 5
     
Phi   
Phi 0c    |
2 | 1 | eleq2i 2417 |
. . . 4
 Phi 0c
   Phi
0c
 
 Phi
   Phi 0c     |
3 | | elun 3221 |
. . . . 5
 Phi 0c
 
 Phi
   Phi 0c    Phi 0c
 
Phi  Phi 0c
 
Phi 0c     |
4 | | vex 2863 |
. . . . . . . . 9
 |
5 | 4 | phiex 4573 |
. . . . . . . 8
Phi  |
6 | | snex 4112 |
. . . . . . . 8
0c  |
7 | 5, 6 | unex 4107 |
. . . . . . 7
Phi
0c
 |
8 | | eqeq1 2359 |
. . . . . . . 8
 Phi 0c  Phi
Phi
0c
Phi    |
9 | 8 | rexbidv 2636 |
. . . . . . 7
 Phi 0c   Phi
 Phi 0c Phi    |
10 | 7, 9 | elab 2986 |
. . . . . 6
 Phi 0c
 
Phi   Phi 0c Phi   |
11 | | phi011 4600 |
. . . . . . . . 9
 Phi
0c
Phi 0c   |
12 | | equcom 1680 |
. . . . . . . . 9
   |
13 | 11, 12 | bitr3i 242 |
. . . . . . . 8
 Phi 0c
Phi 0c
  |
14 | 13 | rexbii 2640 |
. . . . . . 7
 
Phi 0c
Phi 0c
   |
15 | | eqeq1 2359 |
. . . . . . . . 9
 Phi 0c  Phi 0c
Phi 0c
Phi 0c    |
16 | 15 | rexbidv 2636 |
. . . . . . . 8
 Phi 0c   Phi 0c
 Phi 0c Phi 0c    |
17 | 7, 16 | elab 2986 |
. . . . . . 7
 Phi 0c
 
Phi 0c   Phi 0c Phi 0c   |
18 | | risset 2662 |
. . . . . . 7
    |
19 | 14, 17, 18 | 3bitr4i 268 |
. . . . . 6
 Phi 0c
 
Phi 0c    |
20 | 10, 19 | orbi12i 507 |
. . . . 5
  Phi 0c 
 Phi
 Phi 0c 
 Phi 0c    
Phi 0c
Phi    |
21 | 3, 20 | bitri 240 |
. . . 4
 Phi 0c
 
 Phi
   Phi 0c    
Phi 0c
Phi    |
22 | 2, 21 | bitri 240 |
. . 3
 Phi 0c
    
Phi 0c
Phi    |
23 | | phieq 4571 |
. . . . . 6

Phi Phi
  |
24 | 23 | uneq1d 3418 |
. . . . 5
 Phi 0c Phi
0c   |
25 | 24 | eleq1d 2419 |
. . . 4
  Phi 0c  
 Phi 0c
      |
26 | | df-proj2 4569 |
. . . 4
Proj2     Phi 0c      |
27 | 4, 25, 26 | elab2 2989 |
. . 3
 Proj2  
 Phi 0c
     |
28 | | 0cnelphi 4598 |
. . . . . . . 8
0c
Phi  |
29 | | ssun2 3428 |
. . . . . . . . . 10
0c Phi 0c  |
30 | | 0cex 4393 |
. . . . . . . . . . 11
0c
 |
31 | 30 | snid 3761 |
. . . . . . . . . 10
0c
0c |
32 | 29, 31 | sselii 3271 |
. . . . . . . . 9
0c
Phi 0c  |
33 | | eleq2 2414 |
. . . . . . . . 9
 Phi 0c
Phi 0c Phi 0c
0c
Phi    |
34 | 32, 33 | mpbii 202 |
. . . . . . . 8
 Phi 0c
Phi
0c
Phi   |
35 | 28, 34 | mto 167 |
. . . . . . 7
Phi 0c
Phi  |
36 | 35 | a1i 10 |
. . . . . 6
 Phi 0c Phi
  |
37 | 36 | nrex 2717 |
. . . . 5

Phi 0c
Phi  |
38 | 37 | biorfi 396 |
. . . 4
  
Phi 0c
Phi    |
39 | | orcom 376 |
. . . 4
   Phi 0c
Phi   
Phi 0c
Phi    |
40 | 38, 39 | bitri 240 |
. . 3
  
Phi 0c
Phi    |
41 | 22, 27, 40 | 3bitr4i 268 |
. 2
 Proj2  
   |
42 | 41 | eqriv 2350 |
1
Proj2     |