Proof of Theorem hhsssh
| Step | Hyp | Ref
| Expression |
| 1 | | hhsst.1 |
. . . 4
    |
| 2 | | hhsst.2 |
. . . 4
      
        |
| 3 | 1, 2 | hhsst 10769 |
. . 3

SubSp    |
| 4 | | shss 10712 |
. . 3

  |
| 5 | 3, 4 | jca 310 |
. 2

 SubSp     |
| 6 | | eleq1 1957 |
. . 3
    SubSp     

   SubSp     
   |
| 7 | | eqid 1884 |
. . . 4
 
    SubSp     
   SubSp         
   SubSp              SubSp              SubSp 
 
     SubSp         
   SubSp              SubSp         |
| 8 | | xpeq1 4016 |
. . . . . . . . . . . . 13
    SubSp     
      SubSp 
 
     |
| 9 | | xpeq2 4017 |
. . . . . . . . . . . . 13
    SubSp     
    SubSp     
     SubSp     
   SubSp         |
| 10 | 8, 9 | eqtrd 1925 |
. . . . . . . . . . . 12
    SubSp     
      SubSp 
 
     SubSp         |
| 11 | | reseq2 4219 |
. . . . . . . . . . . 12
       SubSp     
   SubSp              SubSp 
 
     SubSp          |
| 12 | 10, 11 | syl 12 |
. . . . . . . . . . 11
    SubSp     
  
    SubSp     
   SubSp          |
| 13 | | xpeq2 4017 |
. . . . . . . . . . . 12
    SubSp     
      SubSp         |
| 14 | | reseq2 4219 |
. . . . . . . . . . . 12
       SubSp       
      SubSp 
 
      |
| 15 | 13, 14 | syl 12 |
. . . . . . . . . . 11
    SubSp     
  
    SubSp 
 
      |
| 16 | 12, 15 | opeq12d 3166 |
. . . . . . . . . 10
    SubSp     
     
   
    SubSp     
   SubSp         
   SubSp           |
| 17 | | reseq2 4219 |
. . . . . . . . . 10
    SubSp     
      SubSp         |
| 18 | 16, 17 | opeq12d 3166 |
. . . . . . . . 9
    SubSp     
      
             SubSp     
   SubSp         
   SubSp              SubSp          |
| 19 | 18, 2 | syl5eq 1940 |
. . . . . . . 8
    SubSp     
      SubSp 
 
     SubSp         
   SubSp              SubSp          |
| 20 | 19 | eleq1d 1963 |
. . . . . . 7
    SubSp     
 SubSp   
    SubSp 
 
     SubSp         
   SubSp              SubSp        SubSp     |
| 21 | | sseq1 2637 |
. . . . . . 7
    SubSp     
    SubSp         |
| 22 | 20, 21 | anbi12d 690 |
. . . . . 6
    SubSp     
  SubSp     
    SubSp 
 
     SubSp         
   SubSp              SubSp        SubSp     SubSp 
 
      |
| 23 | | xpeq1 4016 |
. . . . . . . . . . . 12

   SubSp     
      SubSp 
 
     |
| 24 | | xpeq2 4017 |
. . . . . . . . . . . 12

   SubSp     
    SubSp     
     SubSp     
   SubSp         |
| 25 | 23, 24 | eqtrd 1925 |
. . . . . . . . . . 11

   SubSp     
      SubSp 
 
     SubSp         |
| 26 | | reseq2 4219 |
. . . . . . . . . . 11
       SubSp     
   SubSp              SubSp 
 
     SubSp          |
| 27 | 25, 26 | syl 12 |
. . . . . . . . . 10

   SubSp     
  
    SubSp     
   SubSp          |
| 28 | | xpeq2 4017 |
. . . . . . . . . . 11

   SubSp     
      SubSp         |
| 29 | | reseq2 4219 |
. . . . . . . . . . 11
       SubSp       
      SubSp 
 
      |
| 30 | 28, 29 | syl 12 |
. . . . . . . . . 10

   SubSp     
  
    SubSp 
 
      |
| 31 | 27, 30 | opeq12d 3166 |
. . . . . . . . 9

   SubSp     
     
   
    SubSp     
   SubSp         
   SubSp           |
| 32 | | reseq2 4219 |
. . . . . . . . 9

   SubSp     
      SubSp         |
| 33 | 31, 32 | opeq12d 3166 |
. . . . . . . 8

   SubSp     
      
             SubSp     
   SubSp         
   SubSp              SubSp          |
| 34 | 33 | eleq1d 1963 |
. . . . . . 7

   SubSp     
  

           SubSp   
    SubSp     
   SubSp         
   SubSp              SubSp        SubSp     |
| 35 | | sseq1 2637 |
. . . . . . 7

   SubSp     
    SubSp         |
| 36 | 34, 35 | anbi12d 690 |
. . . . . 6

   SubSp     
        
       SubSp 
        SubSp     
   SubSp         
   SubSp              SubSp        SubSp     SubSp 
 
      |
| 37 | | ax-hfvadd 10502 |
. . . . . . . . . . . . 13
      |
| 38 | | ffn 4562 |
. . . . . . . . . . . . 13
         |
| 39 | 37, 38 | ax-mp 7 |
. . . . . . . . . . . 12

  |
| 40 | | fnresdm 4522 |
. . . . . . . . . . . 12
      |
| 41 | 39, 40 | ax-mp 7 |
. . . . . . . . . . 11
    |
| 42 | | ax-hfvmul 10507 |
. . . . . . . . . . . . 13
      |
| 43 | | ffn 4562 |
. . . . . . . . . . . . 13
    
    |
| 44 | 42, 43 | ax-mp 7 |
. . . . . . . . . . . 12

  |
| 45 | | fnresdm 4522 |
. . . . . . . . . . . 12
      |
| 46 | 44, 45 | ax-mp 7 |
. . . . . . . . . . 11
    |
| 47 | 41, 46 | opeq12i 3163 |
. . . . . . . . . 10
     
  
 |
| 48 | | normf 10622 |
. . . . . . . . . . . 12
     |
| 49 | | ffn 4562 |
. . . . . . . . . . . 12
       |
| 50 | 48, 49 | ax-mp 7 |
. . . . . . . . . . 11
 |
| 51 | | fnresdm 4522 |
. . . . . . . . . . 11
     |
| 52 | 50, 51 | ax-mp 7 |
. . . . . . . . . 10
   |
| 53 | 47, 52 | opeq12i 3163 |
. . . . . . . . 9
 
    
    
 

   |
| 54 | 53, 1 | eqtr4i 1911 |
. . . . . . . 8
 
    
    
 
 |
| 55 | 1 | hhnv 10665 |
. . . . . . . . 9
NrmCVec |
| 56 | | eqid 1884 |
. . . . . . . . . 10
SubSp  SubSp   |
| 57 | 56 | sspid 9723 |
. . . . . . . . 9

NrmCVec SubSp    |
| 58 | 55, 57 | ax-mp 7 |
. . . . . . . 8
SubSp   |
| 59 | 54, 58 | eqeltri 1967 |
. . . . . . 7
 
    
    
 
SubSp   |
| 60 | | ssid 2634 |
. . . . . . 7
 |
| 61 | 59, 60 | pm3.2i 307 |
. . . . . 6
   
           SubSp    |
| 62 | 22, 36, 61 | elimhyp 3021 |
. . . . 5
       SubSp 
 
     SubSp         
   SubSp              SubSp        SubSp     SubSp 
 
    |
| 63 | 62 | simpli 347 |
. . . 4
 
    SubSp     
   SubSp         
   SubSp              SubSp        SubSp   |
| 64 | 62 | simpri 351 |
. . . 4
   SubSp       |
| 65 | 1, 7, 63, 64 | hhshsslem2 10771 |
. . 3
   SubSp     
 |
| 66 | 6, 65 | dedth 3011 |
. 2
  SubSp     |
| 67 | 5, 66 | impbii 174 |
1

 SubSp 
   |