| Step | Hyp | Ref
| Expression |
| 1 | | eleq2 2690 |
. . . . . . . . . . 11
 
   |
| 2 | | eqeq1 2626 |
. . . . . . . . . . 11
             |
| 3 | 1, 2 | imbi12d 334 |
. . . . . . . . . 10
       

        |
| 4 | | dfac14lem.r |
. . . . . . . . . 10
  
           |
| 5 | 3, 4 | elrab2 3366 |
. . . . . . . . 9

      
        |
| 6 | | dfac14lem.0 |
. . . . . . . . . . . . 13
 
   |
| 7 | 6 | adantr 481 |
. . . . . . . . . . . 12
            |
| 8 | | ineq1 3807 |
. . . . . . . . . . . . . 14
               |
| 9 | | ssun1 3776 |
. . . . . . . . . . . . . . 15

    |
| 10 | | sseqin2 3817 |
. . . . . . . . . . . . . . 15
    
 
      |
| 11 | 9, 10 | mpbi 220 |
. . . . . . . . . . . . . 14
       |
| 12 | 8, 11 | syl6eq 2672 |
. . . . . . . . . . . . 13
         |
| 13 | 12 | neeq1d 2853 |
. . . . . . . . . . . 12
       
   |
| 14 | 7, 13 | syl5ibrcom 237 |
. . . . . . . . . . 11
               
    |
| 15 | 14 | imim2d 57 |
. . . . . . . . . 10
                 
      |
| 16 | 15 | expimpd 629 |
. . . . . . . . 9
 
    
   
     

      |
| 17 | 5, 16 | syl5bi 232 |
. . . . . . . 8
 
         |
| 18 | 17 | ralrimiv 2965 |
. . . . . . 7
 
 

     |
| 19 | | dfac14lem.s |
. . . . . . . . . . . 12
 
   |
| 20 | | snex 4908 |
. . . . . . . . . . . 12
 
 |
| 21 | | unexg 6959 |
. . . . . . . . . . . 12
           |
| 22 | 19, 20, 21 | sylancl 694 |
. . . . . . . . . . 11
 
 
     |
| 23 | | ssun2 3777 |
. . . . . . . . . . . 12
       |
| 24 | | dfac14lem.p |
. . . . . . . . . . . . . 14
   |
| 25 | | uniexg 6955 |
. . . . . . . . . . . . . . 15
    |
| 26 | | pwexg 4850 |
. . . . . . . . . . . . . . 15
 
    |
| 27 | 19, 25, 26 | 3syl 18 |
. . . . . . . . . . . . . 14
 
     |
| 28 | 24, 27 | syl5eqel 2705 |
. . . . . . . . . . . . 13
 
   |
| 29 | | snidg 4206 |
. . . . . . . . . . . . 13
     |
| 30 | 28, 29 | syl 17 |
. . . . . . . . . . . 12
 
     |
| 31 | 23, 30 | sseldi 3601 |
. . . . . . . . . . 11
 
       |
| 32 | | epttop 20813 |
. . . . . . . . . . 11
                        TopOn 
      |
| 33 | 22, 31, 32 | syl2anc 693 |
. . . . . . . . . 10
 
              TopOn 
      |
| 34 | 4, 33 | syl5eqel 2705 |
. . . . . . . . 9
 
 TopOn        |
| 35 | | topontop 20718 |
. . . . . . . . 9
 TopOn 
   
  |
| 36 | 34, 35 | syl 17 |
. . . . . . . 8
 
   |
| 37 | | toponuni 20719 |
. . . . . . . . . 10
 TopOn 
           |
| 38 | 34, 37 | syl 17 |
. . . . . . . . 9
 
 
      |
| 39 | 9, 38 | syl5sseq 3653 |
. . . . . . . 8
 
    |
| 40 | 31, 38 | eleqtrd 2703 |
. . . . . . . 8
 
    |
| 41 | | eqid 2622 |
. . . . . . . . 9
   |
| 42 | 41 | elcls 20877 |
. . . . . . . 8
  
                   |
| 43 | 36, 39, 40, 42 | syl3anc 1326 |
. . . . . . 7
 
 
       


      |
| 44 | 18, 43 | mpbird 247 |
. . . . . 6
 
           |
| 45 | 44 | ralrimiva 2966 |
. . . . 5
 
          |
| 46 | | dfac14lem.i |
. . . . . 6
   |
| 47 | | mptelixpg 7945 |
. . . . . 6
    
                    |
| 48 | 46, 47 | syl 17 |
. . . . 5
    
                    |
| 49 | 45, 48 | mpbird 247 |
. . . 4
   
          |
| 50 | | ne0i 3921 |
. . . 4
   
        
          |
| 51 | 49, 50 | syl 17 |
. . 3
            |
| 52 | | dfac14lem.c |
. . 3
                     |
| 53 | 34 | ralrimiva 2966 |
. . . . 5
 
TopOn 
      |
| 54 | | dfac14lem.j |
. . . . . 6
       |
| 55 | 54 | pttopon 21399 |
. . . . 5
   TopOn 
     TopOn         |
| 56 | 46, 53, 55 | syl2anc 693 |
. . . 4
 TopOn         |
| 57 | | topontop 20718 |
. . . 4
 TopOn 
    
  |
| 58 | | cls0 20884 |
. . . 4
           |
| 59 | 56, 57, 58 | 3syl 18 |
. . 3
           |
| 60 | 51, 52, 59 | 3netr4d 2871 |
. 2
                    |
| 61 | | fveq2 6191 |
. . 3
 
                   |
| 62 | 61 | necon3i 2826 |
. 2
                     |
| 63 | 60, 62 | syl 17 |
1
    |