| Step | Hyp | Ref
| Expression |
| 1 | | nnltp1c 6263 |
. . . . . . . . . . . 12
 Nn c 
1c  |
| 2 | | nnnc 6147 |
. . . . . . . . . . . . 13
 Nn NC  |
| 3 | | peano2 4404 |
. . . . . . . . . . . . . 14
 Nn 
1c
Nn  |
| 4 | | nnnc 6147 |
. . . . . . . . . . . . . 14
 
1c
Nn  1c NC  |
| 5 | 3, 4 | syl 15 |
. . . . . . . . . . . . 13
 Nn 
1c
NC  |
| 6 | | ltlenlec 6208 |
. . . . . . . . . . . . 13
  NC  1c NC  c  1c  c  1c  1c c     |
| 7 | 2, 5, 6 | syl2anc 642 |
. . . . . . . . . . . 12
 Nn  c  1c  c  1c  1c c     |
| 8 | 1, 7 | mpbid 201 |
. . . . . . . . . . 11
 Nn  c  1c  1c c    |
| 9 | 8 | simprd 449 |
. . . . . . . . . 10
 Nn  1c c   |
| 10 | 9 | adantr 451 |
. . . . . . . . 9
  Nn Nn  1c c   |
| 11 | 10 | intnand 882 |
. . . . . . . 8
  Nn Nn 1c c 
1c
 1c c    |
| 12 | 11 | a1d 22 |
. . . . . . 7
  Nn Nn  
1c
Nn 1c c  1c  1c c     |
| 13 | | breq2 4644 |
. . . . . . . . . . 11
  1c 1c c 1c c 
1c   |
| 14 | | breq1 4643 |
. . . . . . . . . . 11
  1c  c  1c c    |
| 15 | 13, 14 | anbi12d 691 |
. . . . . . . . . 10
  1c  1c c c  1c c 
1c
 1c c     |
| 16 | 15 | elrab 2995 |
. . . . . . . . 9
 
1c
 Nn 1c c c     1c
Nn 1c c 
1c
 1c c     |
| 17 | 16 | notbii 287 |
. . . . . . . 8
 
1c
 Nn 1c c c    
1c
Nn 1c c 
1c
 1c c     |
| 18 | | imnan 411 |
. . . . . . . 8
  
1c
Nn 1c c  1c  1c c    
1c
Nn 1c c 
1c
 1c c     |
| 19 | 17, 18 | bitr4i 243 |
. . . . . . 7
 
1c
 Nn 1c c c     1c
Nn 1c c 
1c
 1c c     |
| 20 | 12, 19 | sylibr 203 |
. . . . . 6
  Nn Nn  1c  Nn 1c c c     |
| 21 | 3 | adantr 451 |
. . . . . . 7
  Nn Nn  1c
Nn  |
| 22 | | elcomplg 3219 |
. . . . . . 7
 
1c
Nn   1c
∼  Nn 1c c
c    1c
 Nn 1c c c      |
| 23 | 21, 22 | syl 15 |
. . . . . 6
  Nn Nn  
1c
∼  Nn 1c c c    1c
 Nn 1c c c      |
| 24 | 20, 23 | mpbird 223 |
. . . . 5
  Nn Nn  1c
∼  Nn 1c c
c     |
| 25 | | nnnc 6147 |
. . . . . . . . . . . . . 14
 Nn NC  |
| 26 | | ncslesuc 6268 |
. . . . . . . . . . . . . 14
  NC NC  c 
1c
 c 
1c    |
| 27 | 25, 2, 26 | syl2an 463 |
. . . . . . . . . . . . 13
  Nn Nn  c 
1c
 c 
1c    |
| 28 | 27 | expcom 424 |
. . . . . . . . . . . 12
 Nn  Nn  c 
1c
 c 
1c     |
| 29 | 28 | adantrd 454 |
. . . . . . . . . . 11
 Nn   Nn 1c
c   c  1c  c
 1c     |
| 30 | 29 | adantr 451 |
. . . . . . . . . 10
  Nn Nn   Nn 1c c 
 c 
1c
 c 
1c     |
| 31 | 30 | pm5.32d 620 |
. . . . . . . . 9
  Nn Nn    Nn 1c c 
c 
1c   Nn 1c c 
 c 
1c     |
| 32 | | anass 630 |
. . . . . . . . 9
   Nn 1c c 
c 
1c  Nn 1c c c 
1c    |
| 33 | | andi 837 |
. . . . . . . . . 10
   Nn 1c c 
 c 
1c     Nn 1c c 
c 
 
Nn 1c c 

1c    |
| 34 | | anass 630 |
. . . . . . . . . . 11
   Nn 1c c 
c 
 Nn 1c c c     |
| 35 | 34 | orbi1i 506 |
. . . . . . . . . 10
    Nn 1c
c 
c    Nn 1c c  
1c    Nn 1c c c    
Nn 1c c 

1c    |
| 36 | 33, 35 | bitri 240 |
. . . . . . . . 9
   Nn 1c c 
 c 
1c    Nn 1c c c    
Nn 1c c 

1c    |
| 37 | 31, 32, 36 | 3bitr3g 278 |
. . . . . . . 8
  Nn Nn   Nn 1c c c 
1c    Nn 1c c c    
Nn 1c c 

1c     |
| 38 | | 1cnc 6140 |
. . . . . . . . . . . . . . . 16
1c
NC |
| 39 | | addlecncs 6210 |
. . . . . . . . . . . . . . . 16
 1c NC NC 1c c 1c    |
| 40 | 38, 2, 39 | sylancr 644 |
. . . . . . . . . . . . . . 15
 Nn 1c c 1c    |
| 41 | | addccom 4407 |
. . . . . . . . . . . . . . 15
 1c
1c
  |
| 42 | 40, 41 | syl6breqr 4680 |
. . . . . . . . . . . . . 14
 Nn 1c c 
1c  |
| 43 | 3, 42 | jca 518 |
. . . . . . . . . . . . 13
 Nn   1c Nn 1c c 
1c   |
| 44 | | eleq1 2413 |
. . . . . . . . . . . . . 14
  1c  Nn 
1c
Nn   |
| 45 | | breq2 4644 |
. . . . . . . . . . . . . 14
  1c 1c c 1c c 
1c   |
| 46 | 44, 45 | anbi12d 691 |
. . . . . . . . . . . . 13
  1c   Nn 1c
c    1c Nn 1c c 
1c    |
| 47 | 43, 46 | syl5ibrcom 213 |
. . . . . . . . . . . 12
 Nn  
1c

Nn 1c c     |
| 48 | 47 | adantr 451 |
. . . . . . . . . . 11
  Nn Nn   1c  Nn 1c c     |
| 49 | 48 | pm4.71rd 616 |
. . . . . . . . . 10
  Nn Nn   1c   Nn 1c c 

1c    |
| 50 | 49 | bicomd 192 |
. . . . . . . . 9
  Nn Nn    Nn 1c c 

1c 
1c   |
| 51 | 50 | orbi2d 682 |
. . . . . . . 8
  Nn Nn    Nn 1c c c    
Nn 1c c 

1c    Nn 1c c c   
1c    |
| 52 | 37, 51 | bitrd 244 |
. . . . . . 7
  Nn Nn   Nn 1c c c 
1c    Nn 1c c c   
1c    |
| 53 | | breq2 4644 |
. . . . . . . . 9
 1c c 1c c    |
| 54 | | breq1 4643 |
. . . . . . . . 9
  c 
1c
c 
1c   |
| 55 | 53, 54 | anbi12d 691 |
. . . . . . . 8
  1c c c  1c
1c
c c 
1c    |
| 56 | 55 | elrab 2995 |
. . . . . . 7
  Nn 1c c
c  1c   Nn 1c c c 
1c    |
| 57 | | elun 3221 |
. . . . . . . 8
   Nn 1c c c     1c    Nn 1c c
c    
1c    |
| 58 | | breq1 4643 |
. . . . . . . . . . 11
  c c    |
| 59 | 53, 58 | anbi12d 691 |
. . . . . . . . . 10
  1c c c  1c c c     |
| 60 | 59 | elrab 2995 |
. . . . . . . . 9
  Nn 1c c
c    Nn 1c c
c     |
| 61 | | elsn 3749 |
. . . . . . . . 9
   1c 
1c  |
| 62 | 60, 61 | orbi12i 507 |
. . . . . . . 8
   Nn 1c c c    
1c    Nn 1c c c   
1c   |
| 63 | 57, 62 | bitri 240 |
. . . . . . 7
   Nn 1c c c     1c    Nn 1c c c   
1c   |
| 64 | 52, 56, 63 | 3bitr4g 279 |
. . . . . 6
  Nn Nn   Nn 1c c
c  1c    Nn 1c c
c     1c     |
| 65 | 64 | eqrdv 2351 |
. . . . 5
  Nn Nn  Nn 1c c c  1c    Nn 1c c c    
1c    |
| 66 | | sneq 3745 |
. . . . . . . 8
  1c    
1c   |
| 67 | 66 | uneq2d 3419 |
. . . . . . 7
  1c   Nn 1c c
c     
 
Nn 1c c c    
1c    |
| 68 | 67 | eqeq2d 2364 |
. . . . . 6
  1c   Nn 1c c
c  1c    Nn 1c c c       Nn 1c c c  1c    Nn 1c c c    
1c     |
| 69 | 68 | rspcev 2956 |
. . . . 5
  
1c
∼  Nn 1c c c    Nn 1c c c  1c    Nn 1c c c    
1c    ∼  Nn 1c c c    Nn 1c c
c  1c    Nn 1c c c        |
| 70 | 24, 65, 69 | syl2anc 642 |
. . . 4
  Nn Nn  ∼  Nn 1c c c    Nn 1c c c  1c    Nn 1c c c        |
| 71 | | compleq 3244 |
. . . . . 6
  Nn 1c c
c   ∼
∼  Nn 1c c c     |
| 72 | | uneq1 3412 |
. . . . . . 7
  Nn 1c c
c      
 
Nn 1c c c        |
| 73 | 72 | eqeq2d 2364 |
. . . . . 6
  Nn 1c c
c    
Nn 1c c c 
1c  
  
 Nn 1c c c  1c    Nn 1c c c         |
| 74 | 71, 73 | rexeqbidv 2821 |
. . . . 5
  Nn 1c c
c    
∼   Nn 1c c c  1c     
 ∼  Nn 1c c c    Nn 1c c c  1c    Nn 1c c c         |
| 75 | 74 | rspcev 2956 |
. . . 4
   Nn 1c c c    ∼  Nn 1c c c    Nn 1c c
c  1c    Nn 1c c c       

∼  
Nn 1c c c 
1c  
     |
| 76 | 70, 75 | sylan2 460 |
. . 3
   Nn 1c c c    Nn Nn  
 ∼   Nn 1c c
c  1c        |
| 77 | | elsuc 4414 |
. . 3
 
Nn 1c c c 
1c  
1c
  ∼   Nn 1c c c 
1c  
     |
| 78 | 76, 77 | sylibr 203 |
. 2
   Nn 1c c c    Nn Nn  
Nn 1c c c 
1c  
1c  |
| 79 | 78 | expcom 424 |
1
  Nn Nn  
Nn 1c c c    Nn 1c c c 
1c  
1c   |