Proof of Theorem adjaddt
| Step | Hyp | Ref
| Expression |
| 1 | | adjeqt 9775 |
. 2
       
 adjh  adjh       

           adjh  adjh        adjh 
   adjh  adjh     |
| 2 | | hoaddclt 9601 |
. . 3
     
     
       |
| 3 | | dmadjopt 9737 |
. . 3

adjh
      |
| 4 | | dmadjopt 9737 |
. . 3

adjh
      |
| 5 | 2, 3, 4 | syl2an 454 |
. 2
  adjh
adjh         |
| 6 | | hoaddclt 9601 |
. . 3
  adjh      adjh        adjh  adjh         |
| 7 | | dmadjrnt 9738 |
. . . 4

adjh
adjh  adjh |
| 8 | | dmadjopt 9737 |
. . . 4
 adjh  adjh adjh        |
| 9 | 7, 8 | syl 10 |
. . 3

adjh
adjh        |
| 10 | | dmadjrnt 9738 |
. . . 4

adjh
adjh  adjh |
| 11 | | dmadjopt 9737 |
. . . 4
 adjh  adjh adjh        |
| 12 | 10, 11 | syl 10 |
. . 3

adjh
adjh        |
| 13 | 6, 9, 12 | syl2an 454 |
. 2
  adjh
adjh  adjh  adjh         |
| 14 | | ax-his2 8871 |
. . . . . . . 8
          
     
                 
    |
| 15 | | ffvelrn 3799 |
. . . . . . . . . 10
     
       |
| 16 | 15, 3 | sylan 448 |
. . . . . . . . 9
  adjh
    
  |
| 17 | 16 | ad2ant2r 409 |
. . . . . . . 8
   adjh adjh       
  |
| 18 | | ffvelrn 3799 |
. . . . . . . . . 10
     
       |
| 19 | 18, 4 | sylan 448 |
. . . . . . . . 9
  adjh
    
  |
| 20 | 19 | ad2ant2lr 410 |
. . . . . . . 8
   adjh adjh       
  |
| 21 | | simprr 415 |
. . . . . . . 8
   adjh adjh      |
| 22 | 14, 17, 20, 21 | syl3anc 856 |
. . . . . . 7
   adjh adjh                     
          |
| 23 | | adj2t 9774 |
. . . . . . . . . 10
  adjh
         adjh        |
| 24 | 23 | 3expb 832 |
. . . . . . . . 9
  adjh        
   adjh        |
| 25 | 24 | adantlr 393 |
. . . . . . . 8
   adjh adjh            adjh        |
| 26 | | adj2t 9774 |
. . . . . . . . . 10
  adjh
         adjh        |
| 27 | 26 | 3expb 832 |
. . . . . . . . 9
  adjh        
   adjh        |
| 28 | 27 | adantll 392 |
. . . . . . . 8
   adjh adjh            adjh        |
| 29 | 25, 28 | opreq12d 3963 |
. . . . . . 7
   adjh adjh               
     adjh        adjh         |
| 30 | 22, 29 | eqtrd 1499 |
. . . . . 6
   adjh adjh                   adjh        adjh         |
| 31 | | hosvaltOLD 9434 |
. . . . . . . . 9
                       
       |
| 32 | 3, 4 | anim12i 333 |
. . . . . . . . 9
  adjh
adjh     
       |
| 33 | 31, 32 | sylan 448 |
. . . . . . . 8
   adjh adjh

                  |
| 34 | 33 | adantrr 395 |
. . . . . . 7
   adjh adjh                      |
| 35 | 34 | opreq1d 3960 |
. . . . . 6
   adjh adjh                 
        |
| 36 | | his7t 8877 |
. . . . . . 7
   adjh      adjh         adjh      adjh          adjh        adjh         |
| 37 | | simprl 414 |
. . . . . . 7
   adjh adjh      |
| 38 | | adjclt 9772 |
. . . . . . . 8
  adjh
  adjh       |
| 39 | 38 | ad2ant2rl 411 |
. . . . . . 7
   adjh adjh     adjh       |
| 40 | | adjclt 9772 |
. . . . . . . 8
  adjh
  adjh       |
| 41 | 40 | ad2ant2l 408 |
. . . . . . 7
   adjh adjh     adjh       |
| 42 | 36, 37, 39, 41 | syl3anc 856 |
. . . . . 6
   adjh adjh       adjh      adjh          adjh        adjh         |
| 43 | 30, 35, 42 | 3eqtr4d 1509 |
. . . . 5
   adjh adjh               adjh      adjh         |
| 44 | | hosvaltOLD 9434 |
. . . . . . . 8
   adjh      adjh          adjh  adjh        adjh      adjh        |
| 45 | 9, 12 | anim12i 333 |
. . . . . . . 8
  adjh
adjh  adjh      adjh         |
| 46 | 44, 45 | sylan 448 |
. . . . . . 7
   adjh adjh 
  adjh  adjh        adjh      adjh        |
| 47 | 46 | adantrl 394 |
. . . . . 6
   adjh adjh      adjh 
adjh        adjh      adjh        |
| 48 | 47 | opreq2d 3961 |
. . . . 5
   adjh adjh       adjh  adjh          adjh      adjh         |
| 49 | 43, 48 | eqtr4d 1502 |
. . . 4
   adjh adjh               adjh  adjh         |
| 50 | 49 | ex 373 |
. . 3
  adjh
adjh          
  |