| 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 13587 |
. . . . 5
  Rng
Rng  |
| 9 | 3, 8 | imbitrrid 156 |
. . . 4
   Rng 
↾s  Rng
    
Rng  |
| 10 | 8 | adantr 276 |
. . . . . 6
 
Rng  Rng Rng  |
| 11 | 4 | ineq2d 3365 |
. . . . . . . . 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 12770 |
. . . . . . . 8
 
Rng           ↾s     |
| 19 | 12, 18 | eqtrd 2229 |
. . . . . . 7
 
Rng       ↾s     |
| 20 | 5 | ineq2d 3365 |
. . . . . . . . 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 12770 |
. . . . . . . 8
 
Rng           ↾s     |
| 26 | 21, 25 | eqtrd 2229 |
. . . . . . 7
 
Rng       ↾s     |
| 27 | | elinel2 3351 |
. . . . . . . . 9
     |
| 28 | | elinel2 3351 |
. . . . . . . . 9
     |
| 29 | 27, 28 | anim12i 338 |
. . . . . . . 8
   
   
   |
| 30 | 6 | adantlr 477 |
. . . . . . . . 9
   Rng                    |
| 31 | | eqidd 2197 |
. . . . . . . . . . 11
 
Rng         |
| 32 | 13, 31, 17, 15 | ressplusgd 12831 |
. . . . . . . . . 10
 
Rng      
↾s     |
| 33 | 32 | oveqdr 5953 |
. . . . . . . . 9
   Rng                ↾s       |
| 34 | | eqidd 2197 |
. . . . . . . . . . 11
 
Rng         |
| 35 | 22, 34, 17, 24 | ressplusgd 12831 |
. . . . . . . . . 10
 
Rng      
↾s     |
| 36 | 35 | oveqdr 5953 |
. . . . . . . . 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 12847 |
. . . . . . . . . . 11
 
Rng        
↾s     |
| 43 | 17, 15, 42 | syl2anc 411 |
. . . . . . . . . 10
 
Rng         ↾s     |
| 44 | 43 | oveqdr 5953 |
. . . . . . . . 9
   Rng                  ↾s       |
| 45 | | eqid 2196 |
. . . . . . . . . . . 12
 ↾s   ↾s   |
| 46 | | eqid 2196 |
. . . . . . . . . . . 12
         |
| 47 | 45, 46 | ressmulrg 12847 |
. . . . . . . . . . 11
 
Rng        
↾s     |
| 48 | 17, 24, 47 | syl2anc 411 |
. . . . . . . . . 10
 
Rng         ↾s     |
| 49 | 48 | oveqdr 5953 |
. . . . . . . . 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 13587 |
. . . . . 6
 
Rng   ↾s  Rng
 ↾s 
Rng  |
| 53 | 4, 5 | eqtr3d 2231 |
. . . . . . . 8
           |
| 54 | 53 | sseq2d 3214 |
. . . . . . 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 13831 |
. . 3
 SubRng   Rng 
↾s  Rng
       |
| 61 | | eqid 2196 |
. . . 4
         |
| 62 | 61 | issubrng 13831 |
. . 3
 SubRng   Rng 
↾s  Rng
       |
| 63 | 58, 60, 62 | 3bitr4g 223 |
. 2
  SubRng 
SubRng     |
| 64 | 63 | eqrdv 2194 |
1
 SubRng  SubRng    |