| Step | Hyp | Ref
| Expression |
| 1 | | p0ex 4222 |
. . . . . . . . . . 11
   |
| 2 | 1 | ssex 4171 |
. . . . . . . . . 10
     |
| 3 | 2 | adantl 277 |
. . . . . . . . 9
         Omni      |
| 4 | | omex 4630 |
. . . . . . . . 9
 |
| 5 | | djuex 7118 |
. . . . . . . . 9
    ⊔
   |
| 6 | 3, 4, 5 | sylancl 413 |
. . . . . . . 8
         Omni     ⊔    |
| 7 | | simpll 527 |
. . . . . . . 8
         Omni       
    |
| 8 | | ssdomg 6846 |
. . . . . . . . . . . 12
  
        |
| 9 | 1, 8 | ax-mp 5 |
. . . . . . . . . . 11
       |
| 10 | | domrefg 6835 |
. . . . . . . . . . . . . 14
   |
| 11 | 4, 10 | ax-mp 5 |
. . . . . . . . . . . . 13
 |
| 12 | | djudom 7168 |
. . . . . . . . . . . . 13
      ⊔    
⊔    |
| 13 | 11, 12 | mpan2 425 |
. . . . . . . . . . . 12
    ⊔    
⊔    |
| 14 | | df1o2 6496 |
. . . . . . . . . . . . 13
   |
| 15 | | djueq1 7115 |
. . . . . . . . . . . . 13
    ⊔    
⊔    |
| 16 | 14, 15 | ax-mp 5 |
. . . . . . . . . . . 12
 ⊔    
⊔   |
| 17 | 13, 16 | breqtrrdi 4076 |
. . . . . . . . . . 11
    ⊔   ⊔    |
| 18 | | 1onn 6587 |
. . . . . . . . . . . . . 14
 |
| 19 | | endjusym 7171 |
. . . . . . . . . . . . . 14
   
⊔  
⊔    |
| 20 | 4, 18, 19 | mp2an 426 |
. . . . . . . . . . . . 13
 ⊔ 
 ⊔   |
| 21 | | omp1eom 7170 |
. . . . . . . . . . . . 13
 ⊔ 
 |
| 22 | 20, 21 | entr3i 6856 |
. . . . . . . . . . . 12
 ⊔   |
| 23 | | domentr 6859 |
. . . . . . . . . . . 12
   ⊔  
⊔  
⊔  
 ⊔    |
| 24 | 22, 23 | mpan2 425 |
. . . . . . . . . . 11
  ⊔   ⊔ 
 ⊔    |
| 25 | 9, 17, 24 | 3syl 17 |
. . . . . . . . . 10
    ⊔    |
| 26 | 25 | adantl 277 |
. . . . . . . . 9
         Omni     ⊔    |
| 27 | | djudomr 7303 |
. . . . . . . . . 10
    ⊔    |
| 28 | 3, 4, 27 | sylancl 413 |
. . . . . . . . 9
         Omni     ⊔    |
| 29 | 26, 28 | jca 306 |
. . . . . . . 8
         Omni      ⊔
  ⊔     |
| 30 | | breq1 4037 |
. . . . . . . . . . 11
  ⊔  
 ⊔     |
| 31 | | breq2 4038 |
. . . . . . . . . . 11
  ⊔  
 ⊔     |
| 32 | 30, 31 | anbi12d 473 |
. . . . . . . . . 10
  ⊔   
   ⊔   ⊔      |
| 33 | | breq1 4037 |
. . . . . . . . . 10
  ⊔    ⊔     |
| 34 | 32, 33 | imbi12d 234 |
. . . . . . . . 9
  ⊔          ⊔ 

⊔    ⊔      |
| 35 | 34 | spcgv 2851 |
. . . . . . . 8
  ⊔            ⊔   ⊔    ⊔      |
| 36 | 6, 7, 29, 35 | syl3c 63 |
. . . . . . 7
         Omni     ⊔    |
| 37 | 36 | ensymd 6851 |
. . . . . 6
         Omni    
⊔    |
| 38 | | bren 6815 |
. . . . . 6
  ⊔        ⊔    |
| 39 | 37, 38 | sylib 122 |
. . . . 5
         Omni          ⊔    |
| 40 | | simpllr 534 |
. . . . . 6
       
  Omni         ⊔   Omni |
| 41 | | simplr 528 |
. . . . . 6
       
  Omni         ⊔  
    |
| 42 | | simpr 110 |
. . . . . 6
       
  Omni         ⊔        ⊔    |
| 43 | 40, 41, 42 | sbthomlem 15756 |
. . . . 5
       
  Omni         ⊔         |
| 44 | 39, 43 | exlimddv 1913 |
. . . 4
         Omni          |
| 45 | 44 | ex 115 |
. . 3
     
  Omni           |
| 46 | 45 | alrimiv 1888 |
. 2
     
  Omni             |
| 47 | | exmid01 4232 |
. 2
EXMID
            |
| 48 | 46, 47 | sylibr 134 |
1
     
  Omni EXMID |