Proof of Theorem axpownd
| Step | Hyp | Ref
| Expression |
| 1 | | axpowndlem4 3746 |
. 2
              
      |
| 2 | | axpowndlem1 3743 |
. . 3
            
     |
| 3 | 2 | eq4s 822 |
. 2
            
     |
| 4 | 2 | a1d 14 |
. . 3
                     |
| 5 | | eq6 826 |
. . . . . . . 8
      |
| 6 | | eq5 824 |
. . . . . . . 8
       |
| 7 | 5, 6 | hban 704 |
. . . . . . 7
             |
| 8 | | el 1860 |
. . . . . . . . . . . . 13

 |
| 9 | | ddeel1 1003 |
. . . . . . . . . . . . . . 15
       |
| 10 | 9 | eq4ds 823 |
. . . . . . . . . . . . . 14
       |
| 11 | | a14b 820 |
. . . . . . . . . . . . . . 15
     |
| 12 | 11 | a1i 7 |
. . . . . . . . . . . . . 14
   
    |
| 13 | 5, 10, 12 | cbvexd 978 |
. . . . . . . . . . . . 13
        |
| 14 | 8, 13 | mpbii 168 |
. . . . . . . . . . . 12
     |
| 15 | | 19.8a 712 |
. . . . . . . . . . . 12
       |
| 16 | 14, 15 | syl 12 |
. . . . . . . . . . 11
       |
| 17 | | df-ex 679 |
. . . . . . . . . . 11
        |
| 18 | 16, 17 | sylib 173 |
. . . . . . . . . 10
  

  |
| 19 | 18 | adantr 306 |
. . . . . . . . 9
         |
| 20 | | eq5 824 |
. . . . . . . . . . 11
       |
| 21 | | pm4.2i 149 |
. . . . . . . . . . . . . 14
      |
| 22 | 21 | del34b 837 |
. . . . . . . . . . . . 13
        |
| 23 | | alnex 716 |
. . . . . . . . . . . . 13
     |
| 24 | | alnex 716 |
. . . . . . . . . . . . 13
     |
| 25 | 22, 23, 24 | 3bitr3g 427 |
. . . . . . . . . . . 12
        |
| 26 | | nd2 3733 |
. . . . . . . . . . . . 13
     |
| 27 | | mtt 534 |
. . . . . . . . . . . . 13
           |
| 28 | 26, 27 | syl 12 |
. . . . . . . . . . . 12
           |
| 29 | 25, 28 | bitrd 406 |
. . . . . . . . . . 11
           |
| 30 | 20, 29 | biald 782 |
. . . . . . . . . 10
              |
| 31 | 30 | adantl 305 |
. . . . . . . . 9
                 |
| 32 | 19, 31 | mtbid 536 |
. . . . . . . 8
             |
| 33 | 32 | pm2.21d 74 |
. . . . . . 7
               |
| 34 | 7, 33 | 19.21ai 740 |
. . . . . 6
            
    |
| 35 | | 19.8a 712 |
. . . . . 6
                    
    |
| 36 | 34, 35 | syl 12 |
. . . . 5
                   |
| 37 | 36 | a1d 14 |
. . . 4
     
         
     |
| 38 | 37 | exp 291 |
. . 3
                     |
| 39 | 4, 38 | pm2.61i 110 |
. 2
            
     |
| 40 | 1, 3, 39 | pm2.61ii 113 |
1

         
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