| Step | Hyp | Ref
| Expression |
| 1 | | legval.p |
. . 3
     |
| 2 | | legval.d |
. . 3
     |
| 3 | | legval.i |
. . 3
Itv   |
| 4 | | legval.l |
. . 3
≤G   |
| 5 | | legval.g |
. . 3

TarskiG |
| 6 | | legov.a |
. . 3
   |
| 7 | | legov.b |
. . 3
   |
| 8 | | legov.c |
. . 3
   |
| 9 | | legov.d |
. . 3
   |
| 10 | 1, 2, 3, 4, 5, 6, 7, 8, 9 | legov 25480 |
. 2
     

             |
| 11 | | eqid 2622 |
. . . . . . 7
LineG  LineG   |
| 12 | 5 | ad2antrr 762 |
. . . . . . 7
         
     TarskiG |
| 13 | 8 | ad2antrr 762 |
. . . . . . 7
         
       |
| 14 | | simplr 792 |
. . . . . . 7
         
       |
| 15 | 9 | ad2antrr 762 |
. . . . . . 7
         
       |
| 16 | | eqid 2622 |
. . . . . . 7
cgrG  cgrG   |
| 17 | 6 | ad2antrr 762 |
. . . . . . 7
         
       |
| 18 | 7 | ad2antrr 762 |
. . . . . . 7
         
       |
| 19 | | simprl 794 |
. . . . . . . 8
         
           |
| 20 | 1, 11, 3, 12, 13, 15, 14, 19 | btwncolg1 25450 |
. . . . . . 7
         
        LineG       |
| 21 | | simprr 796 |
. . . . . . . 8
         
           |
| 22 | 21 | eqcomd 2628 |
. . . . . . 7
         
           |
| 23 | 1, 11, 3, 12, 13, 14, 15, 16, 17, 18, 2, 20, 22 | lnext 25462 |
. . . . . 6
         
             cgrG           |
| 24 | 12 | ad2antrr 762 |
. . . . . . . . . 10
                
        cgrG          TarskiG |
| 25 | 13 | ad2antrr 762 |
. . . . . . . . . 10
                
        cgrG            |
| 26 | 14 | ad2antrr 762 |
. . . . . . . . . 10
                
        cgrG            |
| 27 | 15 | ad2antrr 762 |
. . . . . . . . . 10
                
        cgrG            |
| 28 | 17 | ad2antrr 762 |
. . . . . . . . . 10
                
        cgrG            |
| 29 | 18 | ad2antrr 762 |
. . . . . . . . . 10
                
        cgrG            |
| 30 | | simplr 792 |
. . . . . . . . . 10
                
        cgrG            |
| 31 | | simpr 477 |
. . . . . . . . . 10
                
        cgrG                 cgrG           |
| 32 | | simpllr 799 |
. . . . . . . . . . 11
                
        cgrG                      |
| 33 | 32 | simpld 475 |
. . . . . . . . . 10
                
        cgrG                |
| 34 | 1, 2, 3, 16, 24, 25, 26, 27, 28, 29, 30, 31, 33 | tgbtwnxfr 25425 |
. . . . . . . . 9
                
        cgrG                |
| 35 | 1, 2, 3, 16, 24, 25, 26, 27, 28, 29, 30, 31 | trgcgrcom 25423 |
. . . . . . . . . . 11
                
        cgrG                 cgrG           |
| 36 | 1, 2, 3, 16, 24, 28, 29, 30, 25, 26, 27, 35 | cgr3simp3 25417 |
. . . . . . . . . 10
                
        cgrG                |
| 37 | 1, 2, 3, 24, 30, 28, 27, 25, 36 | tgcgrcomlr 25375 |
. . . . . . . . 9
                
        cgrG                |
| 38 | 34, 37 | jca 554 |
. . . . . . . 8
                
        cgrG                      |
| 39 | 38 | ex 450 |
. . . . . . 7
   
                     cgrG                      |
| 40 | 39 | reximdva 3017 |
. . . . . 6
         
      
       cgrG         
             |
| 41 | 23, 40 | mpd 15 |
. . . . 5
         
      
           |
| 42 | 41 | adantllr 755 |
. . . 4
          
     
           

           |
| 43 | | simpr 477 |
. . . . 5
 

           
            |
| 44 | | eleq1 2689 |
. . . . . . 7
     
       |
| 45 | | oveq2 6658 |
. . . . . . . 8
       |
| 46 | 45 | eqeq2d 2632 |
. . . . . . 7
     
       |
| 47 | 44, 46 | anbi12d 747 |
. . . . . 6
                         |
| 48 | 47 | cbvrexv 3172 |
. . . . 5
       
   

            |
| 49 | 43, 48 | sylib 208 |
. . . 4
 

           
            |
| 50 | 42, 49 | r19.29a 3078 |
. . 3
 

           

           |
| 51 | 5 | ad2antrr 762 |
. . . . . . 7
    
    
     TarskiG |
| 52 | 6 | ad2antrr 762 |
. . . . . . 7
    
    
       |
| 53 | | simplr 792 |
. . . . . . 7
    
    
       |
| 54 | 7 | ad2antrr 762 |
. . . . . . 7
    
    
       |
| 55 | 8 | ad2antrr 762 |
. . . . . . 7
    
    
       |
| 56 | 9 | ad2antrr 762 |
. . . . . . 7
    
    
       |
| 57 | | simprl 794 |
. . . . . . . 8
    
    
           |
| 58 | 1, 11, 3, 51, 52, 54, 53, 57 | btwncolg3 25452 |
. . . . . . 7
    
    
        LineG       |
| 59 | | simprr 796 |
. . . . . . 7
    
    
           |
| 60 | 1, 11, 3, 51, 52, 53, 54, 16, 55, 56, 2, 58, 59 | lnext 25462 |
. . . . . 6
    
    
             cgrG           |
| 61 | 51 | ad2antrr 762 |
. . . . . . . . . 10
                
        cgrG          TarskiG |
| 62 | 52 | ad2antrr 762 |
. . . . . . . . . 10
                
        cgrG            |
| 63 | 54 | ad2antrr 762 |
. . . . . . . . . 10
                
        cgrG            |
| 64 | 53 | ad2antrr 762 |
. . . . . . . . . 10
                
        cgrG            |
| 65 | 55 | ad2antrr 762 |
. . . . . . . . . 10
                
        cgrG            |
| 66 | | simplr 792 |
. . . . . . . . . 10
                
        cgrG            |
| 67 | 56 | ad2antrr 762 |
. . . . . . . . . 10
                
        cgrG            |
| 68 | | simpr 477 |
. . . . . . . . . . 11
                
        cgrG                 cgrG           |
| 69 | 1, 2, 3, 16, 61, 62, 64, 63, 65, 67, 66, 68 | cgr3swap23 25419 |
. . . . . . . . . 10
                
        cgrG                 cgrG           |
| 70 | | simpllr 799 |
. . . . . . . . . . 11
                
        cgrG                      |
| 71 | 70 | simpld 475 |
. . . . . . . . . 10
                
        cgrG                |
| 72 | 1, 2, 3, 16, 61, 62, 63, 64, 65, 66, 67, 69, 71 | tgbtwnxfr 25425 |
. . . . . . . . 9
                
        cgrG                |
| 73 | 1, 2, 3, 16, 61, 62, 64, 63, 65, 67, 66, 68 | cgr3simp3 25417 |
. . . . . . . . . 10
                
        cgrG                |
| 74 | 1, 2, 3, 61, 63, 62, 66, 65, 73 | tgcgrcomlr 25375 |
. . . . . . . . 9
                
        cgrG                |
| 75 | 72, 74 | jca 554 |
. . . . . . . 8
                
        cgrG                      |
| 76 | 75 | ex 450 |
. . . . . . 7
   
                     cgrG                      |
| 77 | 76 | reximdva 3017 |
. . . . . 6
    
    
      
       cgrG         
             |
| 78 | 60, 77 | mpd 15 |
. . . . 5
    
    
                  |
| 79 | 78 | adantllr 755 |
. . . 4
          
     
           
            |
| 80 | | simpr 477 |
. . . . 5
 

           

           |
| 81 | | oveq2 6658 |
. . . . . . . 8
           |
| 82 | 81 | eleq2d 2687 |
. . . . . . 7
 
   
       |
| 83 | | oveq2 6658 |
. . . . . . . 8
       |
| 84 | 83 | eqeq1d 2624 |
. . . . . . 7
     
       |
| 85 | 82, 84 | anbi12d 747 |
. . . . . 6
                         |
| 86 | 85 | cbvrexv 3172 |
. . . . 5
       
   

            |
| 87 | 80, 86 | sylib 208 |
. . . 4
 

           

           |
| 88 | 79, 87 | r19.29a 3078 |
. . 3
 

           
            |
| 89 | 50, 88 | impbida 877 |
. 2
            

             |
| 90 | 10, 89 | bitrd 268 |
1
     

             |