Proof of Theorem zorn2lem1
| Step | Hyp | Ref
| Expression |
| 1 | | zorn2lem.2 |
. . . . . 6
 
               |
| 2 | | zorn2lem.3 |
. . . . . 6
  |
| 3 | 1, 2 | tfr2 3916 |
. . . . 5

            |
| 4 | | zorn2lem.6 |
. . . . . . 7
      
     |
| 5 | 4 | fveq1i 3716 |
. . . . . 6
                        |
| 6 | 1, 2 | tfrlem7 3908 |
. . . . . . . 8
 |
| 7 | | visset 1809 |
. . . . . . . 8
 |
| 8 | | resfunexg 3571 |
. . . . . . . 8
 
  
  |
| 9 | 6, 7, 8 | mp2an 696 |
. . . . . . 7
   |
| 10 | | zorn2lem.1 |
. . . . . . . . . 10
 |
| 11 | | zorn2lem.5 |
. . . . . . . . . . 11
           |
| 12 | | ssrab2 2127 |
. . . . . . . . . . 11
 
         |
| 13 | 11, 12 | eqsstr 2087 |
. . . . . . . . . 10
 |
| 14 | 10, 13 | ssexi 2715 |
. . . . . . . . 9
 |
| 15 | 14 | rabex 2720 |
. . . . . . . 8
 
    |
| 16 | 15 | uniex 2865 |
. . . . . . 7
       |
| 17 | | rneq 3334 |
. . . . . . . . . . . . . . . . . 18
  
   |
| 18 | | df-ima 3186 |
. . . . . . . . . . . . . . . . . 18
      |
| 19 | 17, 18 | syl6eqr 1522 |
. . . . . . . . . . . . . . . . 17
  
      |
| 20 | 19 | eleq2d 1538 |
. . . . . . . . . . . . . . . 16
           |
| 21 | 20 | imbi1d 612 |
. . . . . . . . . . . . . . 15
                   |
| 22 | 21 | ralbidv2 1662 |
. . . . . . . . . . . . . 14
                  |
| 23 | 22 | rabbisdv 1803 |
. . . . . . . . . . . . 13
                    |
| 24 | | zorn2lem.4 |
. . . . . . . . . . . . 13
      |
| 25 | 23, 24, 11 | 3eqtr4g 1528 |
. . . . . . . . . . . 12
     |
| 26 | 25 | eleq2d 1538 |
. . . . . . . . . . 11
       |
| 27 | 25 | eleq2d 1538 |
. . . . . . . . . . . . 13
       |
| 28 | 27 | imbi1d 612 |
. . . . . . . . . . . 12
               |
| 29 | 28 | ralbidv2 1662 |
. . . . . . . . . . 11
             |
| 30 | 26, 29 | anbi12d 627 |
. . . . . . . . . 10
     
           |
| 31 | 30 | abbidv 1574 |
. . . . . . . . 9
            
      |
| 32 | | df-rab 1649 |
. . . . . . . . 9
 
           |
| 33 | | df-rab 1649 |
. . . . . . . . 9
 
           |
| 34 | 31, 32, 33 | 3eqtr4g 1528 |
. . . . . . . 8
               |
| 35 | 34 | unieqd 2507 |
. . . . . . 7
                 |
| 36 | 9, 16, 35 | fvopab 3781 |
. . . . . 6
       
           
    |
| 37 | 5, 36 | eqtr 1492 |
. . . . 5
        
    |
| 38 | 3, 37 | syl6eq 1520 |
. . . 4

            |
| 39 | 38 | eleq1d 1537 |
. . 3

       
      |
| 40 | 14 | wereucl 2941 |
. . . 4
 
         |
| 41 | 13, 40 | mp3an2 902 |
. . 3
 
   
     |
| 42 | 39, 41 | syl5bir 210 |
. 2

          |
| 43 | 42 | imp 350 |
1
        
  |