Proof of Theorem branmfnt
| Step | Hyp | Ref
| Expression |
| 1 | | fveq2 3709 |
. . . 4
 bra  bra    |
| 2 | 1 | fveq2d 3713 |
. . 3
 normfn bra   normfn bra     |
| 3 | | fveq2 3709 |
. . 3
           |
| 4 | 2, 3 | eqeq12d 1481 |
. 2
  normfn bra       normfn bra          |
| 5 | | brafnt 9787 |
. . . . 5

bra        |
| 6 | | nmfnvalt 9720 |
. . . . 5
 bra      normfn bra                bra            |
| 7 | 5, 6 | syl 10 |
. . . 4

normfn bra      
         bra            |
| 8 | 7 | adantr 389 |
. . 3
 

normfn bra                bra         
  |
| 9 | | supxr2 6029 |
. . . 4
              bra                
         bra                    

         bra                         bra         
      |
| 10 | | nmfnsetret 9721 |
. . . . . . . 8
 bra       
         bra          |
| 11 | 5, 10 | syl 10 |
. . . . . . 7

           bra          |
| 12 | | ressxr 5470 |
. . . . . . . 8
 |
| 13 | 12 | a1i 8 |
. . . . . . 7

  |
| 14 | 11, 13 | sstrd 2064 |
. . . . . 6

           bra          |
| 15 | | normclt 8912 |
. . . . . . 7

      |
| 16 | | rexrt 5471 |
. . . . . . 7
    
      |
| 17 | 15, 16 | syl 10 |
. . . . . 6

      |
| 18 | 14, 17 | jca 288 |
. . . . 5

  
         bra               |
| 19 | 18 | adantr 389 |
. . . 4
 

 

         bra               |
| 20 | | id 59 |
. . . . . . . . . . . . . 14
     bra          bra        |
| 21 | | bravalvalt 9784 |
. . . . . . . . . . . . . . . 16
  
 bra         |
| 22 | 21 | fveq2d 3713 |
. . . . . . . . . . . . . . 15
  
    bra              |
| 23 | 22 | adantr 389 |
. . . . . . . . . . . . . 14
             bra              |
| 24 | 20, 23 | sylan9eqr 1521 |
. . . . . . . . . . . . 13
              bra               |
| 25 | | bcs2t 8970 |
. . . . . . . . . . . . . . . 16
 
                 |
| 26 | 25 | 3expa 831 |
. . . . . . . . . . . . . . 15
                     |
| 27 | 26 | ancom1s 489 |
. . . . . . . . . . . . . 14
                     |
| 28 | 27 | adantr 389 |
. . . . . . . . . . . . 13
              bra                   |
| 29 | 24, 28 | eqbrtrd 2625 |
. . . . . . . . . . . 12
              bra             |
| 30 | 29 | exp41 382 |
. . . . . . . . . . 11

           bra               |
| 31 | 30 | imp4a 364 |
. . . . . . . . . 10

           bra               |
| 32 | 31 | r19.23adv 1738 |
. . . . . . . . 9

           bra              |
| 33 | 32 | imp 350 |
. . . . . . . 8
            bra              |
| 34 | | visset 1804 |
. . . . . . . . 9
 |
| 35 | | eqeq1 1473 |
. . . . . . . . . . 11
      bra          bra         |
| 36 | 35 | anbi2d 614 |
. . . . . . . . . 10
           bra                bra          |
| 37 | 36 | rexbidv 1656 |
. . . . . . . . 9
            bra                 bra          |
| 38 | 34, 37 | elab 1888 |
. . . . . . . 8
            bra                  bra         |
| 39 | 33, 38 | sylan2b 452 |
. . . . . . 7
  

         bra               |
| 40 | 39 | r19.21aiva 1706 |
. . . . . 6

            bra               |
| 41 | 40 | adantr 389 |
. . . . 5
 

  
         bra               |
| 42 | | breq2 2613 |
. . . . . . . . . 10
     
       |
| 43 | 42 | rcla4ev 1868 |
. . . . . . . . 9
     
           bra               
         bra           |
| 44 | | fveq2 3709 |
. . . . . . . . . . . . . . 15
                           |
| 45 | 44 | breq1d 2619 |
. . . . . . . . . . . . . 14
                             |
| 46 | | opreq1 3953 |
. . . . . . . . . . . . . . . 16
                       |
| 47 | 46 | fveq2d 3713 |
. . . . . . . . . . . . . . 15
                      |