| Step | Hyp | Ref
| Expression |
| 1 | | cicrcl 16463 |
. 2
   𝑐
          |
| 2 | | ciclcl 16462 |
. 2
   𝑐
          |
| 3 | | eqid 2622 |
. . . . 5
     |
| 4 | | eqid 2622 |
. . . . 5
         |
| 5 | | simpl 473 |
. . . . 5
  
   
        |
| 6 | | simpr 477 |
. . . . . 6
                 |
| 7 | 6 | adantl 482 |
. . . . 5
  
   
            |
| 8 | | simpl 473 |
. . . . . 6
                 |
| 9 | 8 | adantl 482 |
. . . . 5
  
   
            |
| 10 | 3, 4, 5, 7, 9 | cic 16459 |
. . . 4
  
   
        𝑐   
          |
| 11 | | eqid 2622 |
. . . . . . . . . . . 12
Inv  Inv   |
| 12 | 4, 11, 5, 7, 9, 3 | isoval 16425 |
. . . . . . . . . . 11
  
   
              Inv      |
| 13 | 4, 11, 5, 9, 7 | invsym2 16423 |
. . . . . . . . . . . . . 14
  
   
         Inv      Inv      |
| 14 | 13 | eqcomd 2628 |
. . . . . . . . . . . . 13
  
   
        Inv       Inv      |
| 15 | 14 | dmeqd 5326 |
. . . . . . . . . . . 12
  
   
     
  Inv       Inv      |
| 16 | | df-rn 5125 |
. . . . . . . . . . . 12
  Inv       Inv     |
| 17 | 15, 16 | syl6eqr 2674 |
. . . . . . . . . . 11
  
   
     
  Inv      Inv      |
| 18 | 12, 17 | eqtrd 2656 |
. . . . . . . . . 10
  
   
              Inv      |
| 19 | 18 | eleq2d 2687 |
. . . . . . . . 9
  
   
               Inv       |
| 20 | | vex 3203 |
. . . . . . . . . 10
 |
| 21 | | elrng 5314 |
. . . . . . . . . 10
    Inv   
    Inv        |
| 22 | 20, 21 | mp1i 13 |
. . . . . . . . 9
  
   
         Inv        Inv        |
| 23 | 19, 22 | bitrd 268 |
. . . . . . . 8
  
   
             
   Inv        |
| 24 | | df-br 4654 |
. . . . . . . . . 10
    Inv          Inv      |
| 25 | 24 | exbii 1774 |
. . . . . . . . 9
     Inv    
       Inv      |
| 26 | | vex 3203 |
. . . . . . . . . . . . 13
 |
| 27 | 26, 20 | opeldm 5328 |
. . . . . . . . . . . 12
      Inv      Inv      |
| 28 | 4, 11, 5, 9, 7, 3 | isoval 16425 |
. . . . . . . . . . . . . . . 16
  
   
              Inv      |
| 29 | 28 | eqcomd 2628 |
. . . . . . . . . . . . . . 15
  
   
     
  Inv            |
| 30 | 29 | eleq2d 2687 |
. . . . . . . . . . . . . 14
  
   
         Inv             |
| 31 | 5 | adantr 481 |
. . . . . . . . . . . . . . . 16
       
            
  |
| 32 | 9 | adantr 481 |
. . . . . . . . . . . . . . . 16
       
            
      |
| 33 | 7 | adantr 481 |
. . . . . . . . . . . . . . . 16
       
            
      |
| 34 | | simpr 477 |
. . . . . . . . . . . . . . . 16
       
            
        |
| 35 | 3, 4, 31, 32, 33, 34 | brcici 16460 |
. . . . . . . . . . . . . . 15
       
            
 𝑐      |
| 36 | 35 | ex 450 |
. . . . . . . . . . . . . 14
  
   
              𝑐       |
| 37 | 30, 36 | sylbid 230 |
. . . . . . . . . . . . 13
  
   
         Inv   
 𝑐       |
| 38 | 37 | com12 32 |
. . . . . . . . . . . 12
   Inv          
     
 𝑐       |
| 39 | 27, 38 | syl 17 |
. . . . . . . . . . 11
      Inv      
           𝑐
      |
| 40 | 39 | exlimiv 1858 |
. . . . . . . . . 10
        Inv   
 

           𝑐
      |
| 41 | 40 | com12 32 |
. . . . . . . . 9
  
   
              Inv     𝑐       |
| 42 | 25, 41 | syl5bi 232 |
. . . . . . . 8
  
   
           Inv      𝑐       |
| 43 | 23, 42 | sylbid 230 |
. . . . . . 7
  
   
              𝑐       |
| 44 | 43 | com12 32 |
. . . . . 6
             
     
 𝑐       |
| 45 | 44 | exlimiv 1858 |
. . . . 5
         
    
       𝑐       |
| 46 | 45 | com12 32 |
. . . 4
  
   
               𝑐
      |
| 47 | 10, 46 | sylbid 230 |
. . 3
  
   
        𝑐     𝑐
      |
| 48 | 47 | impancom 456 |
. 2
   𝑐
         
      𝑐       |
| 49 | 1, 2, 48 | mp2and 715 |
1
   𝑐
     𝑐      |