| Step | Hyp | Ref
 | Expression | 
| 1 |   | nmembers1lem1 6269 | 
. 2
            Nn    1c  c        c       Tc Tc
       | 
| 2 |   | breq2 4644 | 
. . . . 5
       0c       c        c 0c   | 
| 3 | 2 | anbi2d 684 | 
. . . 4
       0c     1c  c        c       1c  c        c 0c    | 
| 4 | 3 | rabbidv 2852 | 
. . 3
       0c        Nn    1c  c        c           
Nn    1c  c        c 0c    | 
| 5 |   | tceq 6159 | 
. . . 4
       0c   Tc     Tc
0c  | 
| 6 |   | tceq 6159 | 
. . . 4
    Tc    
Tc 0c   Tc Tc
    Tc Tc
0c  | 
| 7 | 5, 6 | syl 15 | 
. . 3
       0c   Tc Tc    
Tc Tc 0c  | 
| 8 | 4, 7 | eleq12d 2421 | 
. 2
       0c         Nn    1c  c      
 c       Tc Tc
         Nn    1c  c        c
0c     Tc Tc
0c   | 
| 9 |   | breq2 4644 | 
. . . . 5
               c        c     | 
| 10 | 9 | anbi2d 684 | 
. . . 4
             1c  c        c       1c  c        c      | 
| 11 | 10 | rabbidv 2852 | 
. . 3
               
Nn    1c  c        c           
Nn    1c  c        c      | 
| 12 |   | tceq 6159 | 
. . . 4
           Tc    
Tc    | 
| 13 |   | tceq 6159 | 
. . . 4
    Tc    
Tc     Tc Tc    
Tc Tc    | 
| 14 | 12, 13 | syl 15 | 
. . 3
           Tc Tc
    Tc Tc
   | 
| 15 | 11, 14 | eleq12d 2421 | 
. 2
              
  Nn    1c  c        c       Tc Tc
         Nn    1c  c        c       Tc Tc
    | 
| 16 |   | breq2 4644 | 
. . . . 5
            1c        c        c     
1c    | 
| 17 | 16 | anbi2d 684 | 
. . . 4
            1c      1c  c        c       1c  c        c     
1c     | 
| 18 | 17 | rabbidv 2852 | 
. . 3
            1c         Nn    1c  c        c           
Nn    1c  c        c     
1c     | 
| 19 |   | tceq 6159 | 
. . . 4
            1c    Tc     Tc      1c   | 
| 20 |   | tceq 6159 | 
. . . 4
    Tc    
Tc   
 
1c 
  Tc Tc
    Tc Tc
     1c   | 
| 21 | 19, 20 | syl 15 | 
. . 3
            1c    Tc Tc    
Tc Tc   
 
1c   | 
| 22 | 18, 21 | eleq12d 2421 | 
. 2
            1c          Nn    1c  c      
 c       Tc Tc
         Nn    1c  c        c      1c      Tc Tc
     1c    | 
| 23 |   | breq2 4644 | 
. . . . 5
               c        c     | 
| 24 | 23 | anbi2d 684 | 
. . . 4
             1c  c        c       1c  c        c      | 
| 25 | 24 | rabbidv 2852 | 
. . 3
               
Nn    1c  c        c           
Nn    1c  c        c      | 
| 26 |   | tceq 6159 | 
. . . 4
           Tc    
Tc    | 
| 27 |   | tceq 6159 | 
. . . 4
    Tc    
Tc     Tc Tc    
Tc Tc    | 
| 28 | 26, 27 | syl 15 | 
. . 3
           Tc Tc
    Tc Tc
   | 
| 29 | 25, 28 | eleq12d 2421 | 
. 2
              
  Nn    1c  c        c       Tc Tc
         Nn    1c  c        c       Tc Tc
    | 
| 30 |   | nmembers1lem2 6270 | 
. . 3
       Nn    1c  c        c
0c    
0c | 
| 31 |   | tc0c 6164 | 
. . . . 5
  Tc 0c   0c | 
| 32 |   | tceq 6159 | 
. . . . 5
    Tc 0c   0c   Tc Tc
0c  
Tc 0c  | 
| 33 | 31, 32 | ax-mp 5 | 
. . . 4
  Tc Tc
0c  
Tc 0c | 
| 34 | 33, 31 | eqtri 2373 | 
. . 3
  Tc Tc
0c  
0c | 
| 35 | 30, 34 | eleqtrri 2426 | 
. 2
       Nn    1c  c        c
0c     Tc Tc
0c | 
| 36 |   | nntccl 6171 | 
. . . 4
       Nn   Tc     Nn   | 
| 37 |   | nntccl 6171 | 
. . . 4
    Tc    
Nn   Tc Tc    
Nn   | 
| 38 | 36, 37 | syl 15 | 
. . 3
       Nn   Tc Tc    
Nn   | 
| 39 |   | nmembers1lem3 6271 | 
. . . 4
        Nn   Tc Tc    
Nn          
Nn    1c  c        c       Tc Tc
         Nn    1c  c        c     
1c        Tc Tc     1c    | 
| 40 |   | nnnc 6147 | 
. . . . . . 7
       Nn       NC   | 
| 41 |   | 1cnc 6140 | 
. . . . . . . . . . 11
 
1c  
NC | 
| 42 |   | tcdi 6165 | 
. . . . . . . . . . 11
        NC   1c   NC     Tc     
1c 
    Tc     Tc 1c   | 
| 43 | 41, 42 | mpan2 652 | 
. . . . . . . . . 10
       NC   Tc      1c   
  Tc     Tc 1c   | 
| 44 |   | tc1c 6166 | 
. . . . . . . . . . 11
  Tc 1c   1c | 
| 45 | 44 | addceq2i 4388 | 
. . . . . . . . . 10
    Tc     Tc 1c      Tc     1c  | 
| 46 | 43, 45 | syl6eq 2401 | 
. . . . . . . . 9
       NC   Tc      1c   
  Tc     1c   | 
| 47 |   | tceq 6159 | 
. . . . . . . . 9
    Tc   
 
1c 
    Tc     1c    Tc Tc
     1c   
Tc   Tc     1c   | 
| 48 | 46, 47 | syl 15 | 
. . . . . . . 8
       NC   Tc Tc   
 
1c 
  Tc   Tc     1c   | 
| 49 |   | tccl 6161 | 
. . . . . . . . . 10
       NC   Tc     NC   | 
| 50 |   | tcdi 6165 | 
. . . . . . . . . . 11
     Tc     NC   1c
  NC     Tc   Tc     1c     
Tc Tc     Tc 1c   | 
| 51 | 41, 50 | mpan2 652 | 
. . . . . . . . . 10
    Tc    
NC   Tc   Tc     1c      Tc Tc
    Tc 1c   | 
| 52 | 49, 51 | syl 15 | 
. . . . . . . . 9
       NC   Tc   Tc     1c      Tc Tc
    Tc 1c   | 
| 53 | 44 | addceq2i 4388 | 
. . . . . . . . 9
    Tc Tc
    Tc 1c     
Tc Tc     1c  | 
| 54 | 52, 53 | syl6eq 2401 | 
. . . . . . . 8
       NC   Tc   Tc     1c      Tc Tc
    1c   | 
| 55 | 48, 54 | eqtrd 2385 | 
. . . . . . 7
       NC   Tc Tc   
 
1c 
    Tc Tc
    1c   | 
| 56 | 40, 55 | syl 15 | 
. . . . . 6
       Nn   Tc Tc   
 
1c 
    Tc Tc
    1c   | 
| 57 | 56 | eleq2d 2420 | 
. . . . 5
       Nn         Nn    1c  c      
 c      1c      Tc Tc
     1c         Nn    1c  c        c     
1c        Tc Tc     1c    | 
| 58 | 57 | adantr 451 | 
. . . 4
        Nn   Tc Tc    
Nn          
Nn    1c  c        c     
1c      Tc Tc
     1c         Nn    1c  c        c     
1c        Tc Tc     1c    | 
| 59 | 39, 58 | sylibrd 225 | 
. . 3
        Nn   Tc Tc    
Nn          
Nn    1c  c        c       Tc Tc
         Nn    1c  c        c     
1c      Tc Tc
     1c    | 
| 60 | 38, 59 | mpdan 649 | 
. 2
       Nn         Nn    1c  c      
 c       Tc Tc
         Nn    1c  c        c     
1c      Tc Tc
     1c    | 
| 61 | 1, 8, 15, 22, 29, 35, 60 | finds 4412 | 
1
       Nn        Nn    1c  c        c       Tc Tc
   |