Proof of Theorem trnfset
| Step | Hyp | Ref
| Expression |
| 1 | | elisset 2547 |
. 2

  |
| 2 | | trnset.t |
. . 3
Trn   |
| 3 | | fveq2 4765 |
. . . . . 6
 Atoms  Atoms    |
| 4 | | trnset.a |
. . . . . 6
Atoms   |
| 5 | 3, 4 | syl6eqr 2195 |
. . . . 5
 Atoms    |
| 6 | | fveq2 4765 |
. . . . . . . 8
 Dil  Dil    |
| 7 | | trnset.l |
. . . . . . . 8
Dil   |
| 8 | 6, 7 | syl6eqr 2195 |
. . . . . . 7
 Dil    |
| 9 | 8 | fveq1d 4767 |
. . . . . 6
  Dil           |
| 10 | | fveq2 4765 |
. . . . . . . . 9
 WAtoms  WAtoms    |
| 11 | | trnset.w |
. . . . . . . . 9
WAtoms   |
| 12 | 10, 11 | syl6eqr 2195 |
. . . . . . . 8
 WAtoms    |
| 13 | 12 | fveq1d 4767 |
. . . . . . 7
  WAtoms           |
| 14 | | fveq2 4765 |
. . . . . . . . . . . 12
 +P  +P    |
| 15 | | trnset.p |
. . . . . . . . . . . 12
+P   |
| 16 | 14, 15 | syl6eqr 2195 |
. . . . . . . . . . 11
 +P    |
| 17 | 16 | opreqd 4995 |
. . . . . . . . . 10
   +P                  |
| 18 | | fveq2 4765 |
. . . . . . . . . . . 12
 _|_P  _|_P    |
| 19 | | trnset.o |
. . . . . . . . . . . 12
_|_P   |
| 20 | 18, 19 | syl6eqr 2195 |
. . . . . . . . . . 11
 _|_P    |
| 21 | 20 | fveq1d 4767 |
. . . . . . . . . 10
  _|_P               |
| 22 | 17, 21 | ineq12d 3010 |
. . . . . . . . 9
    +P         _|_P                          |
| 23 | 16 | opreqd 4995 |
. . . . . . . . . 10
   +P                  |
| 24 | 23, 21 | ineq12d 3010 |
. . . . . . . . 9
    +P         _|_P                          |
| 25 | 22, 24 | eqeq12d 2155 |
. . . . . . . 8
     +P         _|_P           +P         _|_P                                           |
| 26 | 13, 25 | raleqbidv 2520 |
. . . . . . 7
    WAtoms         +P         _|_P           +P         _|_P                                                 |
| 27 | 13, 26 | raleqbidv 2520 |
. . . . . 6
    WAtoms        WAtoms         +P         _|_P           +P         _|_P                                                       |
| 28 | 9, 27 | rabeqbidv 2536 |
. . . . 5
   Dil       WAtoms        WAtoms         +P         _|_P           +P         _|_P              
                                              |
| 29 | 5, 28 | mpteq12dv 5101 |
. . . 4
  Atoms    Dil       WAtoms        WAtoms         +P         _|_P           +P         _|_P                                                                |
| 30 | | df-trn 18461 |
. . . 4
Trn   Atoms    Dil       WAtoms        WAtoms         +P         _|_P           +P         _|_P            |
| 31 | | fvex 4778 |
. . . . . 6
Atoms   |
| 32 | 4, 31 | eqeltri 2214 |
. . . . 5
 |
| 33 | | mptexg 5109 |
. . . . 5

                                                      |
| 34 | 32, 33 | ax-mp 7 |
. . . 4
                                                     |
| 35 | 29, 30, 34 | fvmpt 5119 |
. . 3

Trn                                                        |
| 36 | 2, 35 | syl5eq 2185 |
. 2

                                                      |
| 37 | 1, 36 | syl 13 |
1

                                                      |