Proof of Theorem xpmapenlem
| Step | Hyp | Ref
| Expression |
| 1 | | fnmap 6723 |
. . 3

  |
| 2 | | xpmapen.1 |
. . . 4
 |
| 3 | | xpmapen.2 |
. . . 4
 |
| 4 | 2, 3 | xpex 4779 |
. . 3
   |
| 5 | | xpmapen.3 |
. . 3
 |
| 6 | | fnovex 5958 |
. . 3
    

      |
| 7 | 1, 4, 5, 6 | mp3an 1348 |
. 2
     |
| 8 | | fnovex 5958 |
. . . 4
        |
| 9 | 1, 2, 5, 8 | mp3an 1348 |
. . 3
   |
| 10 | | fnovex 5958 |
. . . 4
        |
| 11 | 1, 3, 5, 10 | mp3an 1348 |
. . 3
   |
| 12 | 9, 11 | xpex 4779 |
. 2
       |
| 13 | 4, 5 | elmap 6745 |
. . . . . . 7
    
        |
| 14 | | ffvelcdm 5698 |
. . . . . . 7
       
         |
| 15 | 13, 14 | sylanb 284 |
. . . . . 6
     
         |
| 16 | | xp1st 6232 |
. . . . . 6
                 |
| 17 | 15, 16 | syl 14 |
. . . . 5
     
           |
| 18 | | xpmapenlem.4 |
. . . . 5
           |
| 19 | 17, 18 | fmptd 5719 |
. . . 4
           |
| 20 | 2, 5 | elmap 6745 |
. . . 4
  
      |
| 21 | 19, 20 | sylibr 134 |
. . 3
         |
| 22 | | xp2nd 6233 |
. . . . . 6
                 |
| 23 | 15, 22 | syl 14 |
. . . . 5
     
           |
| 24 | | xpmapenlem.5 |
. . . . 5
           |
| 25 | 23, 24 | fmptd 5719 |
. . . 4
           |
| 26 | 3, 5 | elmap 6745 |
. . . 4
  
      |
| 27 | 25, 26 | sylibr 134 |
. . 3
         |
| 28 | | opelxpi 4696 |
. . 3
   
              |
| 29 | 21, 27, 28 | syl2anc 411 |
. 2
                |
| 30 | | xp1st 6232 |
. . . . . . 7
               |
| 31 | 2, 5 | elmap 6745 |
. . . . . . 7
      
          |
| 32 | 30, 31 | sylib 122 |
. . . . . 6
                 |
| 33 | 32 | ffvelcdmda 5700 |
. . . . 5
       
           |
| 34 | | xp2nd 6233 |
. . . . . . 7
               |
| 35 | 3, 5 | elmap 6745 |
. . . . . . 7
      
          |
| 36 | 34, 35 | sylib 122 |
. . . . . 6
                 |
| 37 | 36 | ffvelcdmda 5700 |
. . . . 5
       
           |
| 38 | | opelxpi 4696 |
. . . . 5
         
                                |
| 39 | 33, 37, 38 | syl2anc 411 |
. . . 4
       
                        |
| 40 | | xpmapenlem.6 |
. . . 4
                      |
| 41 | 39, 40 | fmptd 5719 |
. . 3
               |
| 42 | 4, 5 | elmap 6745 |
. . 3
    
        |
| 43 | 41, 42 | sylibr 134 |
. 2
             |
| 44 | | 1st2nd2 6242 |
. . . . 5
                    |
| 45 | 44 | ad2antlr 489 |
. . . 4
     

                     |
| 46 | 32 | feqmptd 5617 |
. . . . . . 7
                       |
| 47 | 46 | ad2antlr 489 |
. . . . . 6
     

                        |
| 48 | | simplr 528 |
. . . . . . . . . . . 12
       
           |
| 49 | 48 | fveq1d 5563 |
. . . . . . . . . . 11
       
                   |
| 50 | | vex 2766 |
. . . . . . . . . . . . . . . 16
 |
| 51 | | 1stexg 6234 |
. . . . . . . . . . . . . . . 16
       |
| 52 | 50, 51 | ax-mp 5 |
. . . . . . . . . . . . . . 15
     |
| 53 | | vex 2766 |
. . . . . . . . . . . . . . 15
 |
| 54 | 52, 53 | fvex 5581 |
. . . . . . . . . . . . . 14
         |
| 55 | | 2ndexg 6235 |
. . . . . . . . . . . . . . . 16
       |
| 56 | 50, 55 | ax-mp 5 |
. . . . . . . . . . . . . . 15
     |
| 57 | 56, 53 | fvex 5581 |
. . . . . . . . . . . . . 14
         |
| 58 | 54, 57 | opex 4263 |
. . . . . . . . . . . . 13
                    |
| 59 | 40 | fvmpt2 5648 |
. . . . . . . . . . . . 13
                                               |
| 60 | 58, 59 | mpan2 425 |
. . . . . . . . . . . 12
                          |
| 61 | 60 | adantl 277 |
. . . . . . . . . . 11
       
                                  |
| 62 | 49, 61 | eqtrd 2229 |
. . . . . . . . . 10
       
                                  |
| 63 | 62 | fveq2d 5565 |
. . . . . . . . 9
       
                                          |
| 64 | 54, 57 | op1st 6213 |
. . . . . . . . 9
                                |
| 65 | 63, 64 | eqtrdi 2245 |
. . . . . . . 8
       
                           |
| 66 | 65 | mpteq2dva 4124 |
. . . . . . 7
     

                              |
| 67 | 18, 66 | eqtrid 2241 |
. . . . . 6
     

                    |
| 68 | 47, 67 | eqtr4d 2232 |
. . . . 5
     

              |
| 69 | 36 | feqmptd 5617 |
. . . . . . 7
                       |
| 70 | 69 | ad2antlr 489 |
. . . . . 6
     

                        |
| 71 | 62 | fveq2d 5565 |
. . . . . . . . 9
       
                                          |
| 72 | 54, 57 | op2nd 6214 |
. . . . . . . . 9
                                |
| 73 | 71, 72 | eqtrdi 2245 |
. . . . . . . 8
       
                           |
| 74 | 73 | mpteq2dva 4124 |
. . . . . . 7
     

                              |
| 75 | 24, 74 | eqtrid 2241 |
. . . . . 6
     

                    |
| 76 | 70, 75 | eqtr4d 2232 |
. . . . 5
     

              |
| 77 | 68, 76 | opeq12d 3817 |
. . . 4
     

                        |
| 78 | 45, 77 | eqtrd 2229 |
. . 3
     

             |
| 79 | | simpll 527 |
. . . . . 6
     

             
   |
| 80 | 79, 13 | sylib 122 |
. . . . 5
     

               
   |
| 81 | 80 | feqmptd 5617 |
. . . 4
     

                   |
| 82 | | simpr 110 |
. . . . . . . . . . . 12
     

                |
| 83 | 82 | fveq2d 5565 |
. . . . . . . . . . 11
     

                        |
| 84 | 21 | ad2antrr 488 |
. . . . . . . . . . . 12
     

               |
| 85 | 27 | ad2antrr 488 |
. . . . . . . . . . . 12
     

               |
| 86 | | op1stg 6217 |
. . . . . . . . . . . 12
   
            |
| 87 | 84, 85, 86 | syl2anc 411 |
. . . . . . . . . . 11
     

                    |
| 88 | 83, 87 | eqtrd 2229 |
. . . . . . . . . 10
     

                 |
| 89 | 88 | fveq1d 5563 |
. . . . . . . . 9
     

                         |
| 90 | | vex 2766 |
. . . . . . . . . . . 12
 |
| 91 | 90, 53 | fvex 5581 |
. . . . . . . . . . 11
     |
| 92 | | 1stexg 6234 |
. . . . . . . . . . 11
               |
| 93 | 91, 92 | ax-mp 5 |
. . . . . . . . . 10
         |
| 94 | 18 | fvmpt2 5648 |
. . . . . . . . . 10
                         |
| 95 | 93, 94 | mpan2 425 |
. . . . . . . . 9
               |
| 96 | 89, 95 | sylan9eq 2249 |
. . . . . . . 8
       
           
                  |
| 97 | 82 | fveq2d 5565 |
. . . . . . . . . . 11
     

                        |
| 98 | | op2ndg 6218 |
. . . . . . . . . . . 12
   
            |
| 99 | 84, 85, 98 | syl2anc 411 |
. . . . . . . . . . 11
     

                    |
| 100 | 97, 99 | eqtrd 2229 |
. . . . . . . . . 10
     

                 |
| 101 | 100 | fveq1d 5563 |
. . . . . . . . 9
     

                         |
| 102 | | 2ndexg 6235 |
. . . . . . . . . . 11
               |
| 103 | 91, 102 | ax-mp 5 |
. . . . . . . . . 10
         |
| 104 | 24 | fvmpt2 5648 |
. . . . . . . . . 10
                         |
| 105 | 103, 104 | mpan2 425 |
. . . . . . . . 9
               |
| 106 | 101, 105 | sylan9eq 2249 |
. . . . . . . 8
       
           
                  |
| 107 | 96, 106 | opeq12d 3817 |
. . . . . . 7
       
           
                                        |
| 108 | 80 | ffvelcdmda 5700 |
. . . . . . . 8
       
           
        |
| 109 | | 1st2nd2 6242 |
. . . . . . . 8
                                |
| 110 | 108, 109 | syl 14 |
. . . . . . 7
       
           
                         |
| 111 | 107, 110 | eqtr4d 2232 |
. . . . . 6
       
           
                         |
| 112 | 111 | mpteq2dva 4124 |
. . . . 5
     

                                        |
| 113 | 40, 112 | eqtrid 2241 |
. . . 4
     

                   |
| 114 | 81, 113 | eqtr4d 2232 |
. . 3
     

             |
| 115 | 78, 114 | impbida 596 |
. 2
     
              |
| 116 | 7, 12, 29, 43, 115 | en3i 6839 |
1
           |