Proof of Theorem dualded2lem
| Step | Hyp | Ref
| Expression |
| 1 | | dedalg 15090 |
. . . . . . . 8
 Ded
Alg  |
| 2 | | eqid 1884 |
. . . . . . . . 9
 |
| 3 | | dualded2lem.1 |
. . . . . . . . 9
dom   |
| 4 | | dualded2lem.3 |
. . . . . . . . 9
o   |
| 5 | 2, 3, 4 | cmppfa 15079 |
. . . . . . . 8
 Alg



   |
| 6 | 1, 5 | syl 12 |
. . . . . . 7
 Ded



   |
| 7 | 6 | simp2d 889 |
. . . . . 6
 Ded

   |
| 8 | 7 | sseld 2619 |
. . . . 5
 Ded
       
    |
| 9 | 8 | anim1d 619 |
. . . 4
 Ded
    
         
         |
| 10 | 9 | ssoprab2g 14333 |
. . 3
 Ded
                            
         |
| 11 | | cnvxp 4332 |
. . . . . . . . 9
      |
| 12 | 11 | eqcomi 1888 |
. . . . . . . 8

     |
| 13 | 12 | eleq2i 1961 |
. . . . . . 7
    
         |
| 14 | | visset 2295 |
. . . . . . . 8
 |
| 15 | | visset 2295 |
. . . . . . . 8
 |
| 16 | 14, 15 | opelcnv 4143 |
. . . . . . 7
              |
| 17 | 13, 16 | bitri 190 |
. . . . . 6
    
    
   |
| 18 | 17 | anbi1i 539 |
. . . . 5
                 
       |
| 19 | 18 | oprabbii 4923 |
. . . 4
            
                 
        |
| 20 | | twsvbdop 14332 |
. . . 4
            
                       |
| 21 | | eqtr 1904 |
. . . . 5
     
        
                 
                  
          
    
                   
               

        |
| 22 | | sseq2 2639 |
. . . . . 6
            
               

                                    
                               

         |
| 23 | | oprex 4907 |
. . . . . . . . . . . . 13
     |
| 24 | | eqid 1884 |
. . . . . . . . . . . . 13
        
               

       |
| 25 | 23, 24 | fnoprab2 5064 |
. . . . . . . . . . . 12
        
          |
| 26 | | fnfun 4510 |
. . . . . . . . . . . 12
                 
    
    
         |
| 27 | 25, 26 | ax-mp 7 |
. . . . . . . . . . 11
        

       |
| 28 | 27 | a1i 8 |
. . . . . . . . . 10
   Ded 
                          
                         
         |
| 29 | | simpl3 881 |
. . . . . . . . . 10
   Ded 
                          
                    
                     

        |
| 30 | | dualded2lem.2 |
. . . . . . . . . . . . . . . 16
cod   |
| 31 | 2, 3, 30, 4 | cmppfd 15092 |
. . . . . . . . . . . . . . 15
  Ded
    
           |
| 32 | 31 | 3expb 1068 |
. . . . . . . . . . . . . 14
  Ded 
                 |
| 33 | 32 | 3adant3 896 |
. . . . . . . . . . . . 13
  Ded 
           
                          
           |
| 34 | 33 | biimpar 461 |
. . . . . . . . . . . 12
   Ded 
                          
                      |
| 35 | | elisset 2299 |
. . . . . . . . . . . . . . . 16

  |
| 36 | | elisset 2299 |
. . . . . . . . . . . . . . . 16

  |
| 37 | 35, 36 | anim12i 360 |
. . . . . . . . . . . . . . 15
 
 
   |
| 38 | 37 | 3ad2ant2 898 |
. . . . . . . . . . . . . 14
  Ded 
           
                           |
| 39 | 38 | adantr 425 |
. . . . . . . . . . . . 13
   Ded 
                          
                     |
| 40 | | opelcnvg 4140 |
. . . . . . . . . . . . 13
 

  
        |
| 41 | 39, 40 | syl 12 |
. . . . . . . . . . . 12
   Ded 
                          
                     
      |
| 42 | 34, 41 | mpbird 213 |
. . . . . . . . . . 11
   Ded 
                          
                       |
| 43 | | relcnv 4301 |
. . . . . . . . . . . . . . . 16
  |
| 44 | 43 | a1i 8 |
. . . . . . . . . . . . . . 15
  Ded 
     |
| 45 | 23 | dmoprabss6 14336 |
. . . . . . . . . . . . . . 15
                       |
| 46 | 44, 45 | syl 12 |
. . . . . . . . . . . . . 14
  Ded 
                       |
| 47 | 15, 14 | opelcnv 4143 |
. . . . . . . . . . . . . . . . . 18
          |
| 48 | 47 | bicomi 189 |
. . . . . . . . . . . . . . . . 17
       
  |
| 49 | 48 | anbi1i 539 |
. . . . . . . . . . . . . . . 16
    
                 |
| 50 | 49 | oprabbii 4923 |
. . . . . . . . . . . . . . 15
                            
       |
| 51 | 50 | dmeqi 4158 |
. . . . . . . . . . . . . 14
          
                 
       |
| 52 | 46, 51 | syl5eq 1940 |
. . . . . . . . . . . . 13
  Ded 
                      |
| 53 | 52 | 3adant3 896 |
. . . . . . . . . . . 12
  Ded 
           
                                 
         |
| 54 | 53 | adantr 425 |
. . . . . . . . . . 11
   Ded 
                          
                                     |
| 55 | 42, 54 | eleqtrrd 1974 |
. . . . . . . . . 10
   Ded 
                          
                                       |
| 56 | | oprssoprvg 14335 |
. . . . . . . . . . 11
          
                 
                                                                    
                 |
| 57 | 56 | eqcomd 1889 |
. . . . . . . . . 10
          
                 
                                                                          
           |
| 58 | 28, 29, 55, 57 | syl111anc 1100 |
. . . . . . . . 9
   Ded 
                          
                             
             
    
           |
| 59 | | simpl2l 929 |
. . . . . . . . . 10
   Ded 
                          
                   |
| 60 | | simpl2r 930 |
. . . . . . . . . 10
   Ded 
                          
                   |
| 61 | | oprex 4907 |
. . . . . . . . . . 11
     |
| 62 | 61 | a1i 8 |
. . . . . . . . . 10
   Ded 
                          
                       |
| 63 | | opreq2 4890 |
. . . . . . . . . . 11
           |
| 64 | | opreq1 4889 |
. . . . . . . . . . 11
           |
| 65 | 63, 64, 24 | oprabval2g 4956 |
. . . . . . . . . 10
 
               
               |
| 66 | 59, 60, 62, 65 | syl111anc 1100 |
. . . . . . . . 9
   Ded 
                          
                           

              |
| 67 | 58, 66 | eqtrd 1925 |
. . . . . . . 8
   Ded 
                          
                             
              |
| 68 | 67 | 3exp1 1084 |
. . . . . . 7
 Ded
 
                           
                                              |
| 69 | 68 | com3r 39 |
. . . . . 6
                          
        Ded
 
                                        |
| 70 | 22, 69 | syl6bi 231 |
. . . . 5
            
               

                                    
       Ded  
                      
                  |
| 71 | 21, 70 | syl 12 |
. . . 4
     
        
                 
                  
          
    
            
                        
        Ded  
                      
                  |
| 72 | 19, 20, 71 | mp2an 761 |
. . 3
                              
       Ded  
                      
                 |
| 73 | 10, 72 | mpcom 60 |
. 2
 Ded
 
                                       |
| 74 | 73 | 3imp 1061 |
1
  Ded 
                                     |