| Step | Hyp | Ref
| Expression |
| 1 | | n0i 3920 |
. . . . . 6
   |
| 2 | | mrsubccat.s |
. . . . . . . . 9
mRSubst   |
| 3 | | fvprc 6185 |
. . . . . . . . 9
 mRSubst    |
| 4 | 2, 3 | syl5eq 2668 |
. . . . . . . 8
   |
| 5 | 4 | rneqd 5353 |
. . . . . . 7
   |
| 6 | | rn0 5377 |
. . . . . . 7
 |
| 7 | 5, 6 | syl6eq 2672 |
. . . . . 6
   |
| 8 | 1, 7 | nsyl2 142 |
. . . . 5

  |
| 9 | | eqid 2622 |
. . . . . 6
mVR  mVR   |
| 10 | | mrsubccat.r |
. . . . . 6
mREx   |
| 11 | 9, 10, 2 | mrsubff 31409 |
. . . . 5
    mVR         |
| 12 | | ffun 6048 |
. . . . 5
    mVR      
  |
| 13 | 8, 11, 12 | 3syl 18 |
. . . 4
   |
| 14 | 9, 10, 2 | mrsubrn 31410 |
. . . . . 6
    mVR     |
| 15 | 14 | eleq2i 2693 |
. . . . 5

    mVR      |
| 16 | 15 | biimpi 206 |
. . . 4

    mVR      |
| 17 | | fvelima 6248 |
. . . 4
      mVR       mVR          |
| 18 | 13, 16, 17 | syl2anc 693 |
. . 3
 
 mVR          |
| 19 | | simprl 794 |
. . . . . . . . . . . 12
   mVR   
 
  |
| 20 | | elfvex 6221 |
. . . . . . . . . . . . . 14
 mREx 
  |
| 21 | 20, 10 | eleq2s 2719 |
. . . . . . . . . . . . 13
   |
| 22 | | eqid 2622 |
. . . . . . . . . . . . . 14
mCN  mCN   |
| 23 | 22, 9, 10 | mrexval 31398 |
. . . . . . . . . . . . 13
 Word  mCN  mVR     |
| 24 | 19, 21, 23 | 3syl 18 |
. . . . . . . . . . . 12
   mVR   
 
Word  mCN  mVR     |
| 25 | 19, 24 | eleqtrd 2703 |
. . . . . . . . . . 11
   mVR   
 
Word  mCN  mVR     |
| 26 | | simprr 796 |
. . . . . . . . . . . 12
   mVR   
 
  |
| 27 | 26, 24 | eleqtrd 2703 |
. . . . . . . . . . 11
   mVR   
 
Word  mCN  mVR     |
| 28 | | elmapi 7879 |
. . . . . . . . . . . . . . . . 17
  mVR     mVR      |
| 29 | 28 | adantr 481 |
. . . . . . . . . . . . . . . 16
   mVR   
 
  mVR      |
| 30 | 29 | adantr 481 |
. . . . . . . . . . . . . . 15
    mVR   
   mCN  mVR      mVR      |
| 31 | 30 | ffvelrnda 6359 |
. . . . . . . . . . . . . 14
     mVR   
   mCN  mVR    mVR         |
| 32 | 24 | ad2antrr 762 |
. . . . . . . . . . . . . 14
     mVR   
   mCN  mVR    mVR   Word  mCN  mVR     |
| 33 | 31, 32 | eleqtrd 2703 |
. . . . . . . . . . . . 13
     mVR   
   mCN  mVR    mVR       Word  mCN  mVR     |
| 34 | | simplr 792 |
. . . . . . . . . . . . . 14
     mVR   
   mCN  mVR    mVR  
 mCN  mVR     |
| 35 | 34 | s1cld 13383 |
. . . . . . . . . . . . 13
     mVR   
   mCN  mVR    mVR  
    Word
 mCN  mVR     |
| 36 | 33, 35 | ifclda 4120 |
. . . . . . . . . . . 12
    mVR   
   mCN  mVR      mVR            
Word  mCN  mVR     |
| 37 | | eqid 2622 |
. . . . . . . . . . . 12
  mCN  mVR     mVR                mCN  mVR     mVR               |
| 38 | 36, 37 | fmptd 6385 |
. . . . . . . . . . 11
   mVR   
 
  mCN  mVR     mVR                 mCN  mVR    Word  mCN  mVR     |
| 39 | | ccatco 13581 |
. . . . . . . . . . 11
  Word  mCN  mVR  
Word  mCN  mVR  
  mCN  mVR     mVR                 mCN  mVR    Word  mCN  mVR       mCN  mVR     mVR               ++       mCN  mVR     mVR               ++    mCN  mVR     mVR                  |
| 40 | 25, 27, 38, 39 | syl3anc 1326 |
. . . . . . . . . 10
   mVR   
 
   mCN  mVR     mVR               ++       mCN  mVR     mVR               ++    mCN  mVR     mVR                  |
| 41 | 40 | oveq2d 6666 |
. . . . . . . . 9
   mVR   
 
 freeMnd  mCN  mVR    g    mCN  mVR     mVR               ++     freeMnd  mCN  mVR    g     mCN  mVR     mVR               ++    mCN  mVR     mVR                   |
| 42 | | fvex 6201 |
. . . . . . . . . . . 12
mCN   |
| 43 | | fvex 6201 |
. . . . . . . . . . . 12
mVR   |
| 44 | 42, 43 | unex 6956 |
. . . . . . . . . . 11
 mCN  mVR    |
| 45 | | eqid 2622 |
. . . . . . . . . . . 12
freeMnd  mCN  mVR    freeMnd  mCN  mVR     |
| 46 | 45 | frmdmnd 17396 |
. . . . . . . . . . 11
  mCN  mVR   freeMnd  mCN  mVR      |
| 47 | 44, 46 | mp1i 13 |
. . . . . . . . . 10
   mVR   
 
freeMnd  mCN  mVR      |
| 48 | | wrdco 13577 |
. . . . . . . . . . 11
  Word  mCN  mVR  
  mCN  mVR     mVR                 mCN  mVR    Word  mCN  mVR       mCN  mVR     mVR               Word
Word  mCN  mVR     |
| 49 | 25, 38, 48 | syl2anc 693 |
. . . . . . . . . 10
   mVR   
 
   mCN  mVR     mVR               Word
Word  mCN  mVR     |
| 50 | | wrdco 13577 |
. . . . . . . . . . 11
  Word  mCN  mVR  
  mCN  mVR     mVR                 mCN  mVR    Word  mCN  mVR       mCN  mVR     mVR               Word
Word  mCN  mVR     |
| 51 | 27, 38, 50 | syl2anc 693 |
. . . . . . . . . 10
   mVR   
 
   mCN  mVR     mVR               Word
Word  mCN  mVR     |
| 52 | | eqid 2622 |
. . . . . . . . . . . . . 14
   freeMnd  mCN  mVR        freeMnd  mCN  mVR      |
| 53 | 45, 52 | frmdbas 17389 |
. . . . . . . . . . . . 13
  mCN  mVR      freeMnd  mCN  mVR     Word  mCN  mVR     |
| 54 | 44, 53 | ax-mp 5 |
. . . . . . . . . . . 12
   freeMnd  mCN  mVR     Word  mCN  mVR    |
| 55 | 54 | eqcomi 2631 |
. . . . . . . . . . 11
Word  mCN  mVR      freeMnd  mCN  mVR      |
| 56 | | eqid 2622 |
. . . . . . . . . . 11
  freeMnd  mCN  mVR       freeMnd  mCN  mVR      |
| 57 | 55, 56 | gsumccat 17378 |
. . . . . . . . . 10
  freeMnd  mCN  mVR       mCN  mVR     mVR               Word
Word  mCN  mVR      mCN  mVR     mVR               Word Word  mCN  mVR     freeMnd  mCN  mVR    g     mCN  mVR     mVR               ++    mCN  mVR     mVR                   freeMnd  mCN  mVR    g    mCN  mVR     mVR                   freeMnd  mCN  mVR       freeMnd  mCN  mVR    g    mCN  mVR     mVR                   |
| 58 | 47, 49, 51, 57 | syl3anc 1326 |
. . . . . . . . 9
   mVR   
 
 freeMnd  mCN  mVR    g     mCN  mVR     mVR               ++    mCN  mVR     mVR                   freeMnd  mCN  mVR    g    mCN  mVR     mVR                   freeMnd  mCN  mVR       freeMnd  mCN  mVR    g    mCN  mVR     mVR                   |
| 59 | 55 | gsumwcl 17377 |
. . . . . . . . . . 11
  freeMnd  mCN  mVR       mCN  mVR     mVR               Word
Word  mCN  mVR     freeMnd  mCN  mVR    g    mCN  mVR     mVR                Word  mCN  mVR     |
| 60 | 47, 49, 59 | syl2anc 693 |
. . . . . . . . . 10
   mVR   
 
 freeMnd  mCN  mVR    g    mCN  mVR     mVR                Word  mCN  mVR     |
| 61 | 55 | gsumwcl 17377 |
. . . . . . . . . . 11
  freeMnd  mCN  mVR       mCN  mVR     mVR               Word
Word  mCN  mVR     freeMnd  mCN  mVR    g    mCN  mVR     mVR                Word  mCN  mVR     |
| 62 | 47, 51, 61 | syl2anc 693 |
. . . . . . . . . 10
   mVR   
 
 freeMnd  mCN  mVR    g    mCN  mVR     mVR                Word  mCN  mVR     |
| 63 | 45, 55, 56 | frmdadd 17392 |
. . . . . . . . . 10
   freeMnd  mCN  mVR    g    mCN  mVR     mVR                Word  mCN  mVR    freeMnd  mCN  mVR    g    mCN  mVR     mVR                Word  mCN  mVR      freeMnd  mCN  mVR    g    mCN  mVR     mVR                   freeMnd  mCN  mVR       freeMnd  mCN  mVR    g    mCN  mVR     mVR                   freeMnd  mCN  mVR    g    mCN  mVR     mVR                ++  freeMnd  mCN  mVR    g    mCN  mVR     mVR                   |
| 64 | 60, 62, 63 | syl2anc 693 |
. . . . . . . . 9
   mVR   
 
  freeMnd  mCN  mVR    g    mCN  mVR     mVR                   freeMnd  mCN  mVR       freeMnd  mCN  mVR    g    mCN  mVR     mVR                   freeMnd  mCN  mVR    g    mCN  mVR     mVR                ++  freeMnd  mCN  mVR    g    mCN  mVR     mVR                   |
| 65 | 41, 58, 64 | 3eqtrd 2660 |
. . . . . . . 8
   mVR   
 
 freeMnd  mCN  mVR    g    mCN  mVR     mVR               ++      freeMnd  mCN  mVR    g    mCN  mVR     mVR                ++  freeMnd  mCN  mVR    g    mCN  mVR     mVR                   |
| 66 | | ssid 3624 |
. . . . . . . . . 10
mVR  mVR   |
| 67 | 66 | a1i 11 |
. . . . . . . . 9
   mVR   
 
mVR 
mVR    |
| 68 | | ccatcl 13359 |
. . . . . . . . . . 11
  Word  mCN  mVR  
Word  mCN  mVR     ++  Word  mCN  mVR     |
| 69 | 25, 27, 68 | syl2anc 693 |
. . . . . . . . . 10
   mVR   
 
 ++  Word  mCN  mVR     |
| 70 | 69, 24 | eleqtrrd 2704 |
. . . . . . . . 9
   mVR   
 
 ++    |
| 71 | 22, 9, 10, 2, 45 | mrsubval 31406 |
. . . . . . . . 9
    mVR    mVR  mVR   ++
          ++    freeMnd  mCN  mVR    g    mCN  mVR     mVR               ++      |
| 72 | 29, 67, 70, 71 | syl3anc 1326 |
. . . . . . . 8
   mVR   
 
        ++    freeMnd  mCN  mVR    g    mCN  mVR     mVR               ++      |
| 73 | 22, 9, 10, 2, 45 | mrsubval 31406 |
. . . . . . . . . 10
    mVR    mVR  mVR 
          freeMnd  mCN  mVR    g    mCN  mVR     mVR                  |
| 74 | 29, 67, 19, 73 | syl3anc 1326 |
. . . . . . . . 9
   mVR   
 
         freeMnd  mCN  mVR    g    mCN  mVR     mVR                  |
| 75 | 22, 9, 10, 2, 45 | mrsubval 31406 |
. . . . . . . . . 10
    mVR    mVR  mVR 
          freeMnd  mCN  mVR    g    mCN  mVR     mVR                  |
| 76 | 29, 67, 26, 75 | syl3anc 1326 |
. . . . . . . . 9
   mVR   
 
         freeMnd  mCN  mVR    g    mCN  mVR     mVR                  |
| 77 | 74, 76 | oveq12d 6668 |
. . . . . . . 8
   mVR   
 
         ++            freeMnd  mCN  mVR    g    mCN  mVR     mVR                ++  freeMnd  mCN  mVR    g    mCN  mVR     mVR                   |
| 78 | 65, 72, 77 | 3eqtr4d 2666 |
. . . . . . 7
   mVR   
 
        ++            ++            |
| 79 | | fveq1 6190 |
. . . . . . . 8
             ++       ++     |
| 80 | | fveq1 6190 |
. . . . . . . . 9
                   |
| 81 | | fveq1 6190 |
. . . . . . . . 9
                   |
| 82 | 80, 81 | oveq12d 6668 |
. . . . . . . 8
              ++               ++
       |
| 83 | 79, 82 | eqeq12d 2637 |
. . . . . . 7
              ++            ++
        
    ++        ++         |
| 84 | 78, 83 | syl5ibcom 235 |
. . . . . 6
   mVR   
 
    
    ++        ++         |
| 85 | 84 | ex 450 |
. . . . 5
  mVR               ++        ++
         |
| 86 | 85 | com23 86 |
. . . 4
  mVR       
 
     ++        ++
         |
| 87 | 86 | rexlimiv 3027 |
. . 3
   mVR       
 
     ++        ++
        |
| 88 | 18, 87 | syl 17 |
. 2
        ++        ++
        |
| 89 | 88 | 3impib 1262 |
1
 

    ++        ++        |