Proof of Theorem subsubm
| Step | Hyp | Ref
| Expression |
| 1 | | eqid 2196 |
. . . . . . . 8
         |
| 2 | 1 | submss 13108 |
. . . . . . 7
 SubMnd 
      |
| 3 | 2 | adantl 277 |
. . . . . 6
  SubMnd  SubMnd  
      |
| 4 | | subsubm.h |
. . . . . . . 8

↾s   |
| 5 | 4 | submbas 13113 |
. . . . . . 7
 SubMnd 
      |
| 6 | 5 | adantr 276 |
. . . . . 6
  SubMnd  SubMnd  
      |
| 7 | 3, 6 | sseqtrrd 3222 |
. . . . 5
  SubMnd  SubMnd  
  |
| 8 | | eqid 2196 |
. . . . . . 7
         |
| 9 | 8 | submss 13108 |
. . . . . 6
 SubMnd 
      |
| 10 | 9 | adantr 276 |
. . . . 5
  SubMnd  SubMnd  
      |
| 11 | 7, 10 | sstrd 3193 |
. . . 4
  SubMnd  SubMnd  
      |
| 12 | | eqid 2196 |
. . . . . . 7
         |
| 13 | 4, 12 | subm0 13114 |
. . . . . 6
 SubMnd 
          |
| 14 | 13 | adantr 276 |
. . . . 5
  SubMnd  SubMnd  
          |
| 15 | | eqid 2196 |
. . . . . . 7
         |
| 16 | 15 | subm0cl 13110 |
. . . . . 6
 SubMnd 
      |
| 17 | 16 | adantl 277 |
. . . . 5
  SubMnd  SubMnd  
      |
| 18 | 14, 17 | eqeltrd 2273 |
. . . 4
  SubMnd  SubMnd  
      |
| 19 | 4 | oveq1i 5932 |
. . . . . . 7
 ↾s    ↾s 
↾s   |
| 20 | | submrcl 13103 |
. . . . . . . . 9
 SubMnd 
  |
| 21 | 20 | adantr 276 |
. . . . . . . 8
  SubMnd     |
| 22 | | ressabsg 12754 |
. . . . . . . 8
  SubMnd    
↾s 
↾s   ↾s    |
| 23 | 21, 22 | mpd3an3 1349 |
. . . . . . 7
  SubMnd    
↾s 
↾s   ↾s    |
| 24 | 19, 23 | eqtrid 2241 |
. . . . . 6
  SubMnd    ↾s   ↾s    |
| 25 | 7, 24 | syldan 282 |
. . . . 5
  SubMnd  SubMnd  
 ↾s   ↾s    |
| 26 | | eqid 2196 |
. . . . . . 7
 ↾s   ↾s   |
| 27 | 26 | submmnd 13112 |
. . . . . 6
 SubMnd 
 ↾s    |
| 28 | 27 | adantl 277 |
. . . . 5
  SubMnd  SubMnd  
 ↾s    |
| 29 | 25, 28 | eqeltrrd 2274 |
. . . 4
  SubMnd  SubMnd  
 ↾s    |
| 30 | 20 | adantr 276 |
. . . . 5
  SubMnd  SubMnd  
  |
| 31 | | eqid 2196 |
. . . . . 6
 ↾s   ↾s   |
| 32 | 8, 12, 31 | issubm2 13105 |
. . . . 5
 
SubMnd           
↾s      |
| 33 | 30, 32 | syl 14 |
. . . 4
  SubMnd  SubMnd  
 SubMnd  
         ↾s      |
| 34 | 11, 18, 29, 33 | mpbir3and 1182 |
. . 3
  SubMnd  SubMnd  
SubMnd    |
| 35 | 34, 7 | jca 306 |
. 2
  SubMnd  SubMnd  
 SubMnd 
   |
| 36 | | simprr 531 |
. . . 4
  SubMnd  
SubMnd 
    |
| 37 | 5 | adantr 276 |
. . . 4
  SubMnd  
SubMnd 
        |
| 38 | 36, 37 | sseqtrd 3221 |
. . 3
  SubMnd  
SubMnd 
        |
| 39 | 13 | adantr 276 |
. . . 4
  SubMnd  
SubMnd 
            |
| 40 | 12 | subm0cl 13110 |
. . . . 5
 SubMnd 
      |
| 41 | 40 | ad2antrl 490 |
. . . 4
  SubMnd  
SubMnd 
        |
| 42 | 39, 41 | eqeltrrd 2274 |
. . 3
  SubMnd  
SubMnd 
        |
| 43 | 24 | adantrl 478 |
. . . 4
  SubMnd  
SubMnd 
   ↾s   ↾s    |
| 44 | 31 | submmnd 13112 |
. . . . 5
 SubMnd 
 ↾s    |
| 45 | 44 | ad2antrl 490 |
. . . 4
  SubMnd  
SubMnd 
   ↾s    |
| 46 | 43, 45 | eqeltrd 2273 |
. . 3
  SubMnd  
SubMnd 
   ↾s    |
| 47 | 4 | submmnd 13112 |
. . . . 5
 SubMnd 
  |
| 48 | 47 | adantr 276 |
. . . 4
  SubMnd  
SubMnd 
    |
| 49 | 1, 15, 26 | issubm2 13105 |
. . . 4
 
SubMnd           
↾s      |
| 50 | 48, 49 | syl 14 |
. . 3
  SubMnd  
SubMnd 
  
SubMnd           
↾s      |
| 51 | 38, 42, 46, 50 | mpbir3and 1182 |
. 2
  SubMnd  
SubMnd 
  SubMnd    |
| 52 | 35, 51 | impbida 596 |
1
 SubMnd 
 SubMnd   SubMnd      |