Proof of Theorem subsubtop
| Step | Hyp | Ref
| Expression |
| 1 | | simp1 876 |
. . . . . . 7
  Top  Top |
| 2 | | ssexg 3457 |
. . . . . . . . . 10
  
    |
| 3 | 2 | ancoms 484 |
. . . . . . . . 9
       |
| 4 | | uniexg 3795 |
. . . . . . . . 9
 Top
   |
| 5 | | subsubtop.1 |
. . . . . . . . . . 11
  |
| 6 | 5 | sseq2i 2642 |
. . . . . . . . . 10
    |
| 7 | 6 | biimpi 168 |
. . . . . . . . 9
    |
| 8 | 3, 4, 7 | syl2an 503 |
. . . . . . . 8
  Top    |
| 9 | 8 | 3adant2 895 |
. . . . . . 7
  Top    |
| 10 | | visset 2295 |
. . . . . . . 8
 |
| 11 | | issubspt 10247 |
. . . . . . . 8
  Top
  subSp    

     |
| 12 | 10, 11 | mp3an2 1179 |
. . . . . . 7
  Top
  subSp    

     |
| 13 | 1, 9, 12 | syl11anc 524 |
. . . . . 6
  Top   subSp           |
| 14 | | simpllr 453 |
. . . . . . . . 9
     Top           |
| 15 | | eqtr 1904 |
. . . . . . . . . . . . 13
        
        |
| 16 | 15 | ancoms 484 |
. . . . . . . . . . . 12
      
          |
| 17 | | ineq1 2789 |
. . . . . . . . . . . 12
           |
| 18 | 16, 17 | sylan 497 |
. . . . . . . . . . 11
             |
| 19 | 18 | adantll 428 |
. . . . . . . . . 10
     Top           
   |
| 20 | | df-ss 2605 |
. . . . . . . . . . . . . . . . 17
     |
| 21 | 20 | biimpi 168 |
. . . . . . . . . . . . . . . 16
 
   |
| 22 | | incom 2787 |
. . . . . . . . . . . . . . . 16

    |
| 23 | 21, 22 | syl5eq 1940 |
. . . . . . . . . . . . . . 15
 
   |
| 24 | 23 | 3ad2ant2 898 |
. . . . . . . . . . . . . 14
  Top  
   |
| 25 | 24 | adantr 425 |
. . . . . . . . . . . . 13
   Top
      |
| 26 | 25 | ad2antrr 440 |
. . . . . . . . . . . 12
     Top             |
| 27 | 26 | ineq2d 2796 |
. . . . . . . . . . 11
     Top                 |
| 28 | | inass 2804 |
. . . . . . . . . . 11
  
      |
| 29 | 27, 28 | syl5eq 1940 |
. . . . . . . . . 10
     Top                 |
| 30 | 19, 29 | eqtrd 1925 |
. . . . . . . . 9
     Top             |
| 31 | | ineq1 2789 |
. . . . . . . . . . 11
       |
| 32 | 31 | eqeq2d 1895 |
. . . . . . . . . 10
         |
| 33 | 32 | rcla4ev 2381 |
. . . . . . . . 9
          |
| 34 | 14, 30, 33 | syl11anc 524 |
. . . . . . . 8
     Top              |
| 35 | 34 | exp31 407 |
. . . . . . 7
   Top
    
   
      |
| 36 | 35 | r19.23adva 2216 |
. . . . . 6
  Top                |
| 37 | 13, 36 | sylbid 220 |
. . . . 5
  Top   subSp    
   
      |
| 38 | 37 | r19.23adv 2215 |
. . . 4
  Top    subSp              |
| 39 | | eqid 1884 |
. . . . . . . . . 10
     |
| 40 | 5 | elsubsp 10248 |
. . . . . . . . . 10
   Top
         
subSp  
    |
| 41 | 39, 40 | mpanr2 776 |
. . . . . . . . 9
   Top
    subSp       |
| 42 | 41 | 3adantl2 1033 |
. . . . . . . 8
   Top
    subSp       |
| 43 | 42 | adantr 425 |
. . . . . . 7
    Top

     
subSp  
    |
| 44 | 24 | ineq2d 2796 |
. . . . . . . . . . 11
  Top          |
| 45 | 44 | adantr 425 |
. . . . . . . . . 10
   Top
          |
| 46 | 45 | eqeq2d 1895 |
. . . . . . . . 9
   Top
            |
| 47 | 46 | biimpar 461 |
. . . . . . . 8
    Top

          |
| 48 | | inass 2804 |
. . . . . . . 8
  
      |
| 49 | 47, 48 | syl6eqr 1946 |
. . . . . . 7
    Top

          |
| 50 | | ineq1 2789 |
. . . . . . . . 9
           |
| 51 | 50 | eqeq2d 1895 |
. . . . . . . 8
             |
| 52 | 51 | rcla4ev 2381 |
. . . . . . 7
    subSp    
      subSp          |
| 53 | 43, 49, 52 | syl11anc 524 |
. . . . . 6
    Top

     subSp          |
| 54 | 53 | ex 402 |
. . . . 5
   Top
    
 subSp           |
| 55 | 54 | r19.23adva 2216 |
. . . 4
  Top       subSp           |
| 56 | 38, 55 | impbid 574 |
. . 3
  Top    subSp              |
| 57 | | stoig3 10253 |
. . . . . 6
  Top   subSp  
 
Top |
| 58 | 57, 6 | sylan2b 501 |
. . . . 5
  Top  subSp     Top |
| 59 | 58 | 3adant2 895 |
. . . 4
  Top  subSp    
Top |
| 60 | | ssexg 3457 |
. . . . . . 7
  
    |
| 61 | 60 | ancoms 484 |
. . . . . 6
       |
| 62 | | sstr 2625 |
. . . . . . 7
 
   |
| 63 | 62, 5 | syl6ss 2663 |
. . . . . 6
 
    |
| 64 | 61, 4, 63 | syl2an 503 |
. . . . 5
  Top 
    |
| 65 | 64 | 3impb 1063 |
. . . 4
  Top    |
| 66 | | visset 2295 |
. . . . 5
 |
| 67 | | issubspt 10247 |
. . . . 5
  subSp  
  Top
  subSp   subSp        subSp  
        |
| 68 | 66, 67 | mp3an2 1179 |
. . . 4
  subSp  
  Top
  subSp   subSp        subSp  
        |
| 69 | 59, 65, 68 | syl11anc 524 |
. . 3
  Top   subSp   subSp        subSp  
        |
| 70 | | issubspt 10247 |
. . . . 5
  Top
  subSp    

     |
| 71 | 66, 70 | mp3an2 1179 |
. . . 4
  Top
  subSp    

     |
| 72 | 1, 65, 71 | syl11anc 524 |
. . 3
  Top   subSp           |
| 73 | 56, 69, 72 | 3bitr4d 609 |
. 2
  Top   subSp   subSp       subSp        |
| 74 | 73 | eqrdv 1882 |
1
  Top  subSp   subSp       subSp       |