| Step | Hyp | Ref
| Expression |
| 1 | | msubff1.v |
. . . 4
mVR   |
| 2 | | msubff1.r |
. . . 4
mREx   |
| 3 | | msubff1.s |
. . . 4
mSubst   |
| 4 | | msubff1.e |
. . . 4
mEx   |
| 5 | 1, 2, 3, 4 | msubff 31427 |
. . 3
 mFS   
   
   |
| 6 | | mapsspm 7891 |
. . . 4
  
  |
| 7 | 6 | a1i 11 |
. . 3
 mFS       |
| 8 | 5, 7 | fssresd 6071 |
. 2
 mFS  
            |
| 9 | | eqid 2622 |
. . . . . . . . . . . . 13
mRSubst  mRSubst   |
| 10 | 1, 2, 9 | mrsubff 31409 |
. . . . . . . . . . . 12
 mFS mRSubst            |
| 11 | 10 | ad2antrr 762 |
. . . . . . . . . . 11
   mFS                   mRSubst            |
| 12 | | simplrl 800 |
. . . . . . . . . . . 12
   mFS                       |
| 13 | 6, 12 | sseldi 3601 |
. . . . . . . . . . 11
   mFS                   
   |
| 14 | 11, 13 | ffvelrnd 6360 |
. . . . . . . . . 10
   mFS                    mRSubst         |
| 15 | | elmapi 7879 |
. . . . . . . . . 10
  mRSubst        mRSubst           |
| 16 | | ffn 6045 |
. . . . . . . . . 10
  mRSubst          mRSubst       |
| 17 | 14, 15, 16 | 3syl 18 |
. . . . . . . . 9
   mFS                    mRSubst       |
| 18 | | simplrr 801 |
. . . . . . . . . . . 12
   mFS                       |
| 19 | 6, 18 | sseldi 3601 |
. . . . . . . . . . 11
   mFS                   
   |
| 20 | 11, 19 | ffvelrnd 6360 |
. . . . . . . . . 10
   mFS                    mRSubst         |
| 21 | | elmapi 7879 |
. . . . . . . . . 10
  mRSubst        mRSubst           |
| 22 | | ffn 6045 |
. . . . . . . . . 10
  mRSubst          mRSubst       |
| 23 | 20, 21, 22 | 3syl 18 |
. . . . . . . . 9
   mFS                    mRSubst       |
| 24 | | simplrr 801 |
. . . . . . . . . . . . 13
    mFS                   
          |
| 25 | 24 | fveq1d 6193 |
. . . . . . . . . . . 12
    mFS                   
         mType                 mType          |
| 26 | 12 | adantr 481 |
. . . . . . . . . . . . . 14
    mFS                   

   |
| 27 | | elmapi 7879 |
. . . . . . . . . . . . . 14
         |
| 28 | 26, 27 | syl 17 |
. . . . . . . . . . . . 13
    mFS                   
      |
| 29 | | ssid 3624 |
. . . . . . . . . . . . . 14
 |
| 30 | 29 | a1i 11 |
. . . . . . . . . . . . 13
    mFS                   
  |
| 31 | | eqid 2622 |
. . . . . . . . . . . . . . . . . 18
mTC  mTC   |
| 32 | | eqid 2622 |
. . . . . . . . . . . . . . . . . 18
mType  mType   |
| 33 | 1, 31, 32 | mtyf2 31448 |
. . . . . . . . . . . . . . . . 17
 mFS mType      mTC    |
| 34 | 33 | ad3antrrr 766 |
. . . . . . . . . . . . . . . 16
    mFS                   
mType      mTC    |
| 35 | | simplrl 800 |
. . . . . . . . . . . . . . . 16
    mFS                   
  |
| 36 | 34, 35 | ffvelrnd 6360 |
. . . . . . . . . . . . . . 15
    mFS                   
 mType     mTC    |
| 37 | | opelxpi 5148 |
. . . . . . . . . . . . . . 15
   mType     mTC 

  mType        mTC     |
| 38 | 36, 37 | sylancom 701 |
. . . . . . . . . . . . . 14
    mFS                   
  mType        mTC     |
| 39 | 31, 4, 2 | mexval 31399 |
. . . . . . . . . . . . . 14
 mTC    |
| 40 | 38, 39 | syl6eleqr 2712 |
. . . . . . . . . . . . 13
    mFS                   
  mType         |
| 41 | 1, 2, 3, 4, 9 | msubval 31422 |
. . . . . . . . . . . . 13
        mType                 mType       
      mType           mRSubst            mType            |
| 42 | 28, 30, 40, 41 | syl3anc 1326 |
. . . . . . . . . . . 12
    mFS                   
         mType              mType           mRSubst            mType            |
| 43 | 18 | adantr 481 |
. . . . . . . . . . . . . 14
    mFS                   

   |
| 44 | | elmapi 7879 |
. . . . . . . . . . . . . 14
         |
| 45 | 43, 44 | syl 17 |
. . . . . . . . . . . . 13
    mFS                   
      |
| 46 | 1, 2, 3, 4, 9 | msubval 31422 |
. . . . . . . . . . . . 13
        mType                 mType       
      mType           mRSubst            mType            |
| 47 | 45, 30, 40, 46 | syl3anc 1326 |
. . . . . . . . . . . 12
    mFS                   
         mType              mType           mRSubst            mType            |
| 48 | 25, 42, 47 | 3eqtr3d 2664 |
. . . . . . . . . . 11
    mFS                   
      mType           mRSubst            mType                mType           mRSubst            mType            |
| 49 | | fvex 6201 |
. . . . . . . . . . . . 13
     mType         |
| 50 | | fvex 6201 |
. . . . . . . . . . . . 13
  mRSubst            mType          |
| 51 | 49, 50 | opth 4945 |
. . . . . . . . . . . 12
       mType           mRSubst            mType                mType           mRSubst            mType         
      mType             mType       
  mRSubst            mType           mRSubst            mType            |
| 52 | 51 | simprbi 480 |
. . . . . . . . . . 11
       mType           mRSubst            mType                mType           mRSubst            mType            mRSubst            mType           mRSubst            mType           |
| 53 | 48, 52 | syl 17 |
. . . . . . . . . 10
    mFS                   
  mRSubst            mType           mRSubst            mType           |
| 54 | | fvex 6201 |
. . . . . . . . . . . 12
 mType      |
| 55 | | vex 3203 |
. . . . . . . . . . . 12
 |
| 56 | 54, 55 | op2nd 7177 |
. . . . . . . . . . 11
     mType         |
| 57 | 56 | fveq2i 6194 |
. . . . . . . . . 10
  mRSubst            mType           mRSubst         |
| 58 | 56 | fveq2i 6194 |
. . . . . . . . . 10
  mRSubst            mType           mRSubst         |
| 59 | 53, 57, 58 | 3eqtr3g 2679 |
. . . . . . . . 9
    mFS                   
  mRSubst          mRSubst          |
| 60 | 17, 23, 59 | eqfnfvd 6314 |
. . . . . . . 8
   mFS                    mRSubst      mRSubst       |
| 61 | 1, 2, 9 | mrsubff1 31411 |
. . . . . . . . . . 11
 mFS  mRSubst               |
| 62 | | f1fveq 6519 |
. . . . . . . . . . 11
   mRSubst               
       mRSubst          mRSubst           |
| 63 | 61, 62 | sylan 488 |
. . . . . . . . . 10
  mFS   
       mRSubst          mRSubst           |
| 64 | | fvres 6207 |
. . . . . . . . . . . 12
     mRSubst         mRSubst       |
| 65 | | fvres 6207 |
. . . . . . . . . . . 12
     mRSubst         mRSubst       |
| 66 | 64, 65 | eqeqan12d 2638 |
. . . . . . . . . . 11
   
      mRSubst          mRSubst       
 mRSubst      mRSubst        |
| 67 | 66 | adantl 482 |
. . . . . . . . . 10
  mFS   
       mRSubst          mRSubst         mRSubst      mRSubst        |
| 68 | 63, 67 | bitr3d 270 |
. . . . . . . . 9
  mFS   
      mRSubst      mRSubst        |
| 69 | 68 | adantr 481 |
. . . . . . . 8
   mFS                     mRSubst      mRSubst        |
| 70 | 60, 69 | mpbird 247 |
. . . . . . 7
   mFS                     |
| 71 | 70 | fveq1d 6193 |
. . . . . 6
   mFS                             |
| 72 | 71 | expr 643 |
. . . . 5
   mFS                             |
| 73 | 72 | ralrimdva 2969 |
. . . 4
  mFS   
            

           |
| 74 | | fvres 6207 |
. . . . . 6
                 |
| 75 | | fvres 6207 |
. . . . . 6
                 |
| 76 | 74, 75 | eqeqan12d 2638 |
. . . . 5
   
             
     
           |
| 77 | 76 | adantl 482 |
. . . 4
  mFS   
      
             
           |
| 78 | | ffn 6045 |
. . . . . . 7
       |
| 79 | | ffn 6045 |
. . . . . . 7
       |
| 80 | | eqfnfv 6311 |
. . . . . . 7
 
  
           |
| 81 | 78, 79, 80 | syl2an 494 |
. . . . . 6
                        |
| 82 | 27, 44, 81 | syl2an 494 |
. . . . 5
   
    
           |
| 83 | 82 | adantl 482 |
. . . 4
  mFS   
                 |
| 84 | 73, 77, 83 | 3imtr4d 283 |
. . 3
  mFS   
      
                 |
| 85 | 84 | ralrimivva 2971 |
. 2
 mFS                   
         |
| 86 | | dff13 6512 |
. 2
 
          
             
         
                  |
| 87 | 8, 85, 86 | sylanbrc 698 |
1
 mFS  
            |