Proof of Theorem subsubrg
| Step | Hyp | Ref
| Expression |
| 1 | | subrgrcl 18785 |
. . . . . 6
 SubRing 
  |
| 2 | 1 | adantr 481 |
. . . . 5
  SubRing 
SubRing     |
| 3 | | eqid 2622 |
. . . . . . . . . 10
         |
| 4 | 3 | subrgss 18781 |
. . . . . . . . 9
 SubRing 
      |
| 5 | 4 | adantl 482 |
. . . . . . . 8
  SubRing 
SubRing         |
| 6 | | subsubrg.s |
. . . . . . . . . 10

↾s   |
| 7 | 6 | subrgbas 18789 |
. . . . . . . . 9
 SubRing 
      |
| 8 | 7 | adantr 481 |
. . . . . . . 8
  SubRing 
SubRing         |
| 9 | 5, 8 | sseqtr4d 3642 |
. . . . . . 7
  SubRing 
SubRing     |
| 10 | 6 | oveq1i 6660 |
. . . . . . . 8
 ↾s    ↾s 
↾s   |
| 11 | | ressabs 15939 |
. . . . . . . 8
  SubRing 

  ↾s 
↾s   ↾s    |
| 12 | 10, 11 | syl5eq 2668 |
. . . . . . 7
  SubRing 

 ↾s   ↾s    |
| 13 | 9, 12 | syldan 487 |
. . . . . 6
  SubRing 
SubRing    ↾s   ↾s    |
| 14 | | eqid 2622 |
. . . . . . . 8
 ↾s   ↾s   |
| 15 | 14 | subrgring 18783 |
. . . . . . 7
 SubRing 
 ↾s    |
| 16 | 15 | adantl 482 |
. . . . . 6
  SubRing 
SubRing    ↾s    |
| 17 | 13, 16 | eqeltrrd 2702 |
. . . . 5
  SubRing 
SubRing    ↾s    |
| 18 | 2, 17 | jca 554 |
. . . 4
  SubRing 
SubRing     ↾s     |
| 19 | | eqid 2622 |
. . . . . . . 8
         |
| 20 | 19 | subrgss 18781 |
. . . . . . 7
 SubRing 
      |
| 21 | 20 | adantr 481 |
. . . . . 6
  SubRing 
SubRing         |
| 22 | 9, 21 | sstrd 3613 |
. . . . 5
  SubRing 
SubRing         |
| 23 | | eqid 2622 |
. . . . . . . 8
         |
| 24 | 6, 23 | subrg1 18790 |
. . . . . . 7
 SubRing 
          |
| 25 | 24 | adantr 481 |
. . . . . 6
  SubRing 
SubRing             |
| 26 | | eqid 2622 |
. . . . . . . 8
         |
| 27 | 26 | subrg1cl 18788 |
. . . . . . 7
 SubRing 
      |
| 28 | 27 | adantl 482 |
. . . . . 6
  SubRing 
SubRing         |
| 29 | 25, 28 | eqeltrd 2701 |
. . . . 5
  SubRing 
SubRing         |
| 30 | 22, 29 | jca 554 |
. . . 4
  SubRing 
SubRing               |
| 31 | 19, 23 | issubrg 18780 |
. . . 4
 SubRing   
 ↾s                |
| 32 | 18, 30, 31 | sylanbrc 698 |
. . 3
  SubRing 
SubRing   SubRing    |
| 33 | 32, 9 | jca 554 |
. 2
  SubRing 
SubRing    SubRing 
   |
| 34 | 6 | subrgring 18783 |
. . . . 5
 SubRing 
  |
| 35 | 34 | adantr 481 |
. . . 4
  SubRing 
 SubRing 
 
  |
| 36 | 12 | adantrl 752 |
. . . . 5
  SubRing 
 SubRing 
 
 ↾s   ↾s    |
| 37 | | eqid 2622 |
. . . . . . 7
 ↾s   ↾s   |
| 38 | 37 | subrgring 18783 |
. . . . . 6
 SubRing 
 ↾s    |
| 39 | 38 | ad2antrl 764 |
. . . . 5
  SubRing 
 SubRing 
 
 ↾s    |
| 40 | 36, 39 | eqeltrd 2701 |
. . . 4
  SubRing 
 SubRing 
 
 ↾s    |
| 41 | 35, 40 | jca 554 |
. . 3
  SubRing 
 SubRing 
 

 ↾s     |
| 42 | | simprr 796 |
. . . . 5
  SubRing 
 SubRing 
 
  |
| 43 | 7 | adantr 481 |
. . . . 5
  SubRing 
 SubRing 
 
      |
| 44 | 42, 43 | sseqtrd 3641 |
. . . 4
  SubRing 
 SubRing 
 
      |
| 45 | 24 | adantr 481 |
. . . . 5
  SubRing 
 SubRing 
 
          |
| 46 | 23 | subrg1cl 18788 |
. . . . . 6
 SubRing 
      |
| 47 | 46 | ad2antrl 764 |
. . . . 5
  SubRing 
 SubRing 
 
      |
| 48 | 45, 47 | eqeltrrd 2702 |
. . . 4
  SubRing 
 SubRing 
 
      |
| 49 | 44, 48 | jca 554 |
. . 3
  SubRing 
 SubRing 
 
    
       |
| 50 | 3, 26 | issubrg 18780 |
. . 3
 SubRing   
 ↾s                |
| 51 | 41, 49, 50 | sylanbrc 698 |
. 2
  SubRing 
 SubRing 
 
SubRing    |
| 52 | 33, 51 | impbida 877 |
1
 SubRing 
 SubRing   SubRing 
    |