Detailed syntax breakdown of Definition df-plus
| Step | Hyp | Ref
| Expression |
| 1 | | caddc 5217 |
. 2
 |
| 2 | | vx |
. . . . . . 7
 |
| 3 | 2 | cv 953 |
. . . . . 6
 |
| 4 | | cc 5212 |
. . . . . 6
 |
| 5 | 3, 4 | wcel 956 |
. . . . 5
 |
| 6 | | vy |
. . . . . . 7
 |
| 7 | 6 | cv 953 |
. . . . . 6
 |
| 8 | 7, 4 | wcel 956 |
. . . . 5
 |
| 9 | 5, 8 | wa 223 |
. . . 4

  |
| 10 | | vw |
. . . . . . . . . . . . 13
 |
| 11 | 10 | cv 953 |
. . . . . . . . . . . 12
 |
| 12 | | vv |
. . . . . . . . . . . . 13
 |
| 13 | 12 | cv 953 |
. . . . . . . . . . . 12
 |
| 14 | 11, 13 | cop 2407 |
. . . . . . . . . . 11
    |
| 15 | 3, 14 | wceq 954 |
. . . . . . . . . 10
    |
| 16 | | vu |
. . . . . . . . . . . . 13
 |
| 17 | 16 | cv 953 |
. . . . . . . . . . . 12
 |
| 18 | | vf |
. . . . . . . . . . . . 13
 |
| 19 | 18 | cv 953 |
. . . . . . . . . . . 12
 |
| 20 | 17, 19 | cop 2407 |
. . . . . . . . . . 11
    |
| 21 | 7, 20 | wceq 954 |
. . . . . . . . . 10
    |
| 22 | 15, 21 | wa 223 |
. . . . . . . . 9
         |
| 23 | | vz |
. . . . . . . . . . 11
 |
| 24 | 23 | cv 953 |
. . . . . . . . . 10
 |
| 25 | | cplr 4977 |
. . . . . . . . . . . 12
 |
| 26 | 11, 17, 25 | co 3954 |
. . . . . . . . . . 11
   |
| 27 | 13, 19, 25 | co 3954 |
. . . . . . . . . . 11
   |
| 28 | 26, 27 | cop 2407 |
. . . . . . . . . 10
 
      |
| 29 | 24, 28 | wceq 954 |
. . . . . . . . 9
        |
| 30 | 22, 29 | wa 223 |
. . . . . . . 8
   
        
     |
| 31 | 30, 18 | wex 978 |
. . . . . . 7
        
 
   
     |
| 32 | 31, 16 | wex 978 |
. . . . . 6
                
     |
| 33 | 32, 12 | wex 978 |
. . . . 5
            
 
   
     |
| 34 | 33, 10 | wex 978 |
. . . 4
                    
     |
| 35 | 9, 34 | wa 223 |
. . 3
                       
      |
| 36 | 35, 2, 6, 23 | copab2 3955 |
. 2
                              
       |
| 37 | 1, 36 | wceq 954 |
1
        
               
 
   
       |