Proof of Theorem cnimass
| Step | Hyp | Ref
| Expression |
| 1 | | cnimass.1 |
. . . . . . 7
  |
| 2 | | eqid 1884 |
. . . . . . 7
 subSp      subSp      |
| 3 | 1, 2 | iscn 9034 |
. . . . . 6
  Top subSp     Top   Cn subSp            subSp    
 subSp               |
| 4 | | stoig3 10253 |
. . . . . . 7
  Top   subSp  
 
Top |
| 5 | | cnimass.2 |
. . . . . . . 8
  |
| 6 | 5 | sseq2i 2642 |
. . . . . . 7
    |
| 7 | 4, 6 | sylan2b 501 |
. . . . . 6
  Top  subSp     Top |
| 8 | 3, 7 | sylan2 500 |
. . . . 5
  Top  Top     Cn subSp            subSp    
 subSp               |
| 9 | 8 | anassrs 489 |
. . . 4
   Top
Top
   Cn subSp            subSp    
 subSp               |
| 10 | 9 | adantrr 431 |
. . 3
   Top
Top 

        Cn subSp  
         subSp    
 subSp               |
| 11 | 10 | 3adantl3 1034 |
. 2
   Top
Top  Cn    
        Cn subSp  
         subSp    
 subSp               |
| 12 | | df-f 4010 |
. . 3
      subSp     
 subSp        |
| 13 | 1, 5 | cnf 9038 |
. . . . 5
  Top Top
 Cn         |
| 14 | 13 | adantr 425 |
. . . 4
   Top
Top  Cn    
            |
| 15 | | ffn 4562 |
. . . 4
       |
| 16 | 14, 15 | syl 12 |
. . 3
   Top
Top  Cn    
        |
| 17 | | fnfvrnss 4803 |
. . . . . 6
      
   |
| 18 | 13, 15 | syl 12 |
. . . . . 6
  Top Top
 Cn     |
| 19 | 17, 18 | sylan 497 |
. . . . 5
   Top
Top  Cn   
       |
| 20 | 19 | adantrl 430 |
. . . 4
   Top
Top  Cn    
     
  |
| 21 | | stoig2 10252 |
. . . . . . 7
  Top    subSp       |
| 22 | 21, 6 | sylan2b 501 |
. . . . . 6
  Top   subSp       |
| 23 | 22 | adantrr 431 |
. . . . 5
  Top      
   subSp       |
| 24 | 23 | 3ad2antl2 1039 |
. . . 4
   Top
Top  Cn    
       subSp       |
| 25 | 20, 24 | sseqtr4d 2654 |
. . 3
   Top
Top  Cn    
     
 subSp       |
| 26 | 12, 16, 25 | sylanbrc 527 |
. 2
   Top
Top  Cn    
           subSp       |
| 27 | | ssexg 3457 |
. . . . . . . . 9
 

  |
| 28 | 27 | ancoms 484 |
. . . . . . . 8
 
   |
| 29 | | uniexg 3795 |
. . . . . . . . 9
 Top
   |
| 30 | 29, 5 | syl5eqel 1975 |
. . . . . . . 8
 Top
  |
| 31 | 28, 30 | sylan 497 |
. . . . . . 7
  Top    |
| 32 | | visset 2295 |
. . . . . . . 8
 |
| 33 | | issubspt 10247 |
. . . . . . . 8
  Top
  subSp    

     |
| 34 | 32, 33 | mp3an2 1179 |
. . . . . . 7
  Top
  subSp    

     |
| 35 | 31, 34 | syldan 516 |
. . . . . 6
  Top   subSp    

     |
| 36 | 35 | adantrr 431 |
. . . . 5
  Top      
   subSp  
        |
| 37 | 36 | 3ad2antl2 1039 |
. . . 4
   Top
Top  Cn    
       subSp    

     |
| 38 | | imaeq2 4260 |
. . . . . . 7
                 |
| 39 | 38 | eleq1d 1963 |
. . . . . 6
                   |
| 40 | | fnfun 4510 |
. . . . . . . . . . 11

  |
| 41 | 13, 15, 40 | 3syl 24 |
. . . . . . . . . 10
  Top Top
 Cn     |
| 42 | 41 | ad2antrr 440 |
. . . . . . . . 9
    Top Top
 Cn        
     |
| 43 | | inpreima 15682 |
. . . . . . . . 9

                     |
| 44 | 42, 43 | syl 12 |
. . . . . . . 8
    Top Top
 Cn        
                        |
| 45 | | imassrn 4278 |
. . . . . . . . . . . . 13
      |
| 46 | 45 | a1i 8 |
. . . . . . . . . . . 12
  Top Top
 Cn          |
| 47 | | fndm 4512 |
. . . . . . . . . . . . . 14

  |
| 48 | 13, 15, 47 | 3syl 24 |
. . . . . . . . . . . . 13
  Top Top
 Cn     |
| 49 | | dfdm4 4151 |
. . . . . . . . . . . . 13
 |
| 50 | 48, 49 | syl5eqr 1942 |
. . . . . . . . . . . 12
  Top Top
 Cn  
  |
| 51 | 46, 50 | sseqtrd 2653 |
. . . . . . . . . . 11
  Top Top
 Cn          |
| 52 | 51 | ad2antrr 440 |
. . . . . . . . . 10
    Top Top
 Cn        
          |
| 53 | | ssid 2634 |
. . . . . . . . . . . . . . . 16
 |
| 54 | 53 | a1i 8 |
. . . . . . . . . . . . . . 15
  Top Top
 Cn     |
| 55 | 54, 48 | sseqtr4d 2654 |
. . . . . . . . . . . . . 14
  Top Top
 Cn     |
| 56 | | funimass5 4780 |
. . . . . . . . . . . . . 14
             
   |
| 57 | 41, 55, 56 | syl11anc 524 |
. . . . . . . . . . . . 13
  Top Top
 Cn                 |
| 58 | 57 | biimpar 461 |
. . . . . . . . . . . 12
   Top
Top  Cn   
            |
| 59 | 58 | adantrl 430 |
. . . . . . . . . . 11
   Top
Top  Cn    
             |
| 60 | 59 | adantr 425 |
. . . . . . . . . 10
    Top Top
 Cn        
          |
| 61 | 52, 60 | sstrd 2627 |
. . . . . . . . 9
    Top Top
 Cn        
               |
| 62 | | df-ss 2605 |
. . . . . . . . 9
                              |
| 63 | 61, 62 | sylib 215 |
. . . . . . . 8
    Top Top
 Cn        
                      |
| 64 | 44, 63 | eqtrd 1925 |
. . . . . . 7
    Top Top
 Cn        
                 |
| 65 | | cnima 9044 |
. . . . . . . 8
   Top
Top  Cn           |
| 66 | 65 | adantlr 429 |
. . . . . . 7
    Top Top
 Cn        
          |
| 67 | 64, 66 | eqeltrd 1971 |
. . . . . 6
    Top Top
 Cn        
            |
| 68 | 39, 67 | syl5cbir 228 |
. . . . 5
    Top Top
 Cn        
              |
| 69 | 68 | r19.23adva 2216 |
. . . 4
   Top
Top  Cn    
                  |
| 70 | 37, 69 | sylbid 220 |
. . 3
   Top
Top  Cn    
       subSp    
        |
| 71 | 70 | r19.21aiv 2175 |
. 2
   Top
Top  Cn    
       subSp             |
| 72 | 11, 26, 71 | mpbir2and 802 |
1
   Top
Top  Cn    
       Cn subSp        |