| Step | Hyp | Ref
 | Expression | 
| 1 |   | simp1 999 | 
. . . . 5
        Rng      ↾s      Rng                    Rng  | 
| 2 | 1 | a1i 9 | 
. . . 4
             Rng     
↾s      Rng    
              
Rng   | 
| 3 |   | simp1 999 | 
. . . . 5
        Rng      ↾s      Rng                    Rng  | 
| 4 |   | subrngpropd.1 | 
. . . . . 6
                  | 
| 5 |   | subrngpropd.2 | 
. . . . . 6
                  | 
| 6 |   | subrngpropd.3 | 
. . . . . 6
       
      
                                     | 
| 7 |   | subrngpropd.4 | 
. . . . . 6
       
      
                                   | 
| 8 | 4, 5, 6, 7 | rngpropd 13511 | 
. . . . 5
            Rng  
    Rng   | 
| 9 | 3, 8 | imbitrrid 156 | 
. . . 4
             Rng     
↾s      Rng    
              
Rng   | 
| 10 | 8 | adantr 276 | 
. . . . . 6
       
    Rng         Rng       Rng   | 
| 11 | 4 | ineq2d 3364 | 
. . . . . . . . 9
                              | 
| 12 | 11 | adantr 276 | 
. . . . . . . 8
       
    Rng                           | 
| 13 |   | eqidd 2197 | 
. . . . . . . . 9
       
    Rng       ↾s         ↾s     | 
| 14 |   | eqidd 2197 | 
. . . . . . . . 9
       
    Rng                   | 
| 15 |   | simpr 110 | 
. . . . . . . . 9
       
    Rng        Rng  | 
| 16 |   | vex 2766 | 
. . . . . . . . . 10
        | 
| 17 | 16 | a1i 9 | 
. . . . . . . . 9
       
    Rng           | 
| 18 | 13, 14, 15, 17 | ressbasd 12745 | 
. . . . . . . 8
       
    Rng                        ↾s      | 
| 19 | 12, 18 | eqtrd 2229 | 
. . . . . . 7
       
    Rng                    ↾s      | 
| 20 | 5 | ineq2d 3364 | 
. . . . . . . . 9
                              | 
| 21 | 20 | adantr 276 | 
. . . . . . . 8
       
    Rng                           | 
| 22 |   | eqidd 2197 | 
. . . . . . . . 9
       
    Rng       ↾s         ↾s     | 
| 23 |   | eqidd 2197 | 
. . . . . . . . 9
       
    Rng                   | 
| 24 | 8 | biimpa 296 | 
. . . . . . . . 9
       
    Rng        Rng  | 
| 25 | 22, 23, 24, 17 | ressbasd 12745 | 
. . . . . . . 8
       
    Rng                        ↾s      | 
| 26 | 21, 25 | eqtrd 2229 | 
. . . . . . 7
       
    Rng                    ↾s      | 
| 27 |   | elinel2 3350 | 
. . . . . . . . 9
                        | 
| 28 |   | elinel2 3350 | 
. . . . . . . . 9
                        | 
| 29 | 27, 28 | anim12i 338 | 
. . . . . . . 8
                     
                     
      | 
| 30 | 6 | adantlr 477 | 
. . . . . . . . 9
             Rng                                                | 
| 31 |   | eqidd 2197 | 
. . . . . . . . . . 11
       
    Rng                     | 
| 32 | 13, 31, 17, 15 | ressplusgd 12806 | 
. . . . . . . . . 10
       
    Rng                   
↾s      | 
| 33 | 32 | oveqdr 5950 | 
. . . . . . . . 9
             Rng                                             ↾s        | 
| 34 |   | eqidd 2197 | 
. . . . . . . . . . 11
       
    Rng                     | 
| 35 | 22, 34, 17, 24 | ressplusgd 12806 | 
. . . . . . . . . 10
       
    Rng                   
↾s      | 
| 36 | 35 | oveqdr 5950 | 
. . . . . . . . 9
             Rng                                             ↾s        | 
| 37 | 30, 33, 36 | 3eqtr3d 2237 | 
. . . . . . . 8
             Rng                               
↾s                  ↾s        | 
| 38 | 29, 37 | sylan2 286 | 
. . . . . . 7
             Rng                                           
↾s                  ↾s        | 
| 39 | 7 | adantlr 477 | 
. . . . . . . . 9
             Rng                                              | 
| 40 |   | eqid 2196 | 
. . . . . . . . . . . 12
     ↾s         ↾s    | 
| 41 |   | eqid 2196 | 
. . . . . . . . . . . 12
                | 
| 42 | 40, 41 | ressmulrg 12822 | 
. . . . . . . . . . 11
               
Rng                 
↾s      | 
| 43 | 17, 15, 42 | syl2anc 411 | 
. . . . . . . . . 10
       
    Rng                  ↾s      | 
| 44 | 43 | oveqdr 5950 | 
. . . . . . . . 9
             Rng                                           ↾s        | 
| 45 |   | eqid 2196 | 
. . . . . . . . . . . 12
     ↾s         ↾s    | 
| 46 |   | eqid 2196 | 
. . . . . . . . . . . 12
                | 
| 47 | 45, 46 | ressmulrg 12822 | 
. . . . . . . . . . 11
               
Rng                 
↾s      | 
| 48 | 17, 24, 47 | syl2anc 411 | 
. . . . . . . . . 10
       
    Rng                  ↾s      | 
| 49 | 48 | oveqdr 5950 | 
. . . . . . . . 9
             Rng                                           ↾s        | 
| 50 | 39, 44, 49 | 3eqtr3d 2237 | 
. . . . . . . 8
             Rng                               ↾s                 ↾s        | 
| 51 | 29, 50 | sylan2 286 | 
. . . . . . 7
             Rng                                           ↾s                 ↾s        | 
| 52 | 19, 26, 38, 51 | rngpropd 13511 | 
. . . . . 6
       
    Rng        ↾s      Rng  
   ↾s     
Rng   | 
| 53 | 4, 5 | eqtr3d 2231 | 
. . . . . . . 8
                      | 
| 54 | 53 | sseq2d 3213 | 
. . . . . . 7
                   
            | 
| 55 | 54 | adantr 276 | 
. . . . . 6
       
    Rng                             | 
| 56 | 10, 52, 55 | 3anbi123d 1323 | 
. . . . 5
       
    Rng          Rng  
   ↾s      Rng
              
     Rng      ↾s      Rng  
             | 
| 57 | 56 | ex 115 | 
. . . 4
            Rng         Rng     
↾s      Rng    
          
     Rng      ↾s      Rng  
              | 
| 58 | 2, 9, 57 | pm5.21ndd 706 | 
. . 3
             Rng     
↾s      Rng    
          
     Rng      ↾s      Rng  
             | 
| 59 |   | eqid 2196 | 
. . . 4
                | 
| 60 | 59 | issubrng 13755 | 
. . 3
        SubRng           Rng     
↾s      Rng    
          | 
| 61 |   | eqid 2196 | 
. . . 4
                | 
| 62 | 61 | issubrng 13755 | 
. . 3
        SubRng           Rng     
↾s      Rng    
          | 
| 63 | 58, 60, 62 | 3bitr4g 223 | 
. 2
             SubRng     
     SubRng      | 
| 64 | 63 | eqrdv 2194 | 
1
        SubRng       SubRng     |