| Step | Hyp | Ref
| Expression |
| 1 | | df-br 4654 |
. . . . 5
    
       |
| 2 | | funcrcl 16523 |
. . . . 5
  
  
    |
| 3 | 1, 2 | sylbi 207 |
. . . 4
     
   |
| 4 | 3 | simpld 475 |
. . 3
       |
| 5 | 4 | a1i 11 |
. 2
     
   |
| 6 | | df-br 4654 |
. . . . 5
    cat         cat     |
| 7 | | funcrcl 16523 |
. . . . 5
  
   cat     cat
    |
| 8 | 6, 7 | sylbi 207 |
. . . 4
    cat    
 cat     |
| 9 | 8 | simpld 475 |
. . 3
    cat      |
| 10 | 9 | a1i 11 |
. 2
     cat   
   |
| 11 | | funcres2b.1 |
. . . . . . . 8
       |
| 12 | | funcres2b.r |
. . . . . . . . 9
 Subcat    |
| 13 | | funcres2b.s |
. . . . . . . . 9
     |
| 14 | | eqid 2622 |
. . . . . . . . 9
         |
| 15 | 12, 13, 14 | subcss1 16502 |
. . . . . . . 8

      |
| 16 | 11, 15 | fssd 6057 |
. . . . . . 7
           |
| 17 | | eqid 2622 |
. . . . . . . . . 10
 cat   cat   |
| 18 | | subcrcl 16476 |
. . . . . . . . . . 11
 Subcat 
  |
| 19 | 12, 18 | syl 17 |
. . . . . . . . . 10
   |
| 20 | 17, 14, 19, 13, 15 | rescbas 16489 |
. . . . . . . . 9
     cat
    |
| 21 | 20 | feq3d 6032 |
. . . . . . . 8
              cat
     |
| 22 | 11, 21 | mpbid 222 |
. . . . . . 7
         cat
    |
| 23 | 16, 22 | 2thd 255 |
. . . . . 6
                  cat
     |
| 24 | 23 | adantr 481 |
. . . . 5
 

        
        cat      |
| 25 | | funcres2b.2 |
. . . . . . . . . . . . . . . . 17
 

                        |
| 26 | 25 | adantlr 751 |
. . . . . . . . . . . . . . . 16
    
 
                      |
| 27 | | frn 6053 |
. . . . . . . . . . . . . . . 16
                        
              |
| 28 | 26, 27 | syl 17 |
. . . . . . . . . . . . . . 15
    
 
                  |
| 29 | 12 | ad2antrr 762 |
. . . . . . . . . . . . . . . 16
    
 
Subcat    |
| 30 | 13 | ad2antrr 762 |
. . . . . . . . . . . . . . . 16
    
 

   |
| 31 | | eqid 2622 |
. . . . . . . . . . . . . . . 16
       |
| 32 | 11 | ad2antrr 762 |
. . . . . . . . . . . . . . . . 17
    
 
      |
| 33 | | simprl 794 |
. . . . . . . . . . . . . . . . 17
    
 
  |
| 34 | 32, 33 | ffvelrnd 6360 |
. . . . . . . . . . . . . . . 16
    
 
      |
| 35 | | simprr 796 |
. . . . . . . . . . . . . . . . 17
    
 
  |
| 36 | 32, 35 | ffvelrnd 6360 |
. . . . . . . . . . . . . . . 16
    
 
      |
| 37 | 29, 30, 31, 34, 36 | subcss2 16503 |
. . . . . . . . . . . . . . 15
    
 
                             |
| 38 | 28, 37 | sstrd 3613 |
. . . . . . . . . . . . . 14
    
 
                     |
| 39 | 38, 28 | 2thd 255 |
. . . . . . . . . . . . 13
    
 
    
      
       
                   |
| 40 | 39 | anbi2d 740 |
. . . . . . . . . . . 12
    
 
             
      
        
            
                |
| 41 | | df-f 5892 |
. . . . . . . . . . . 12
                           
            
      
           |
| 42 | | df-f 5892 |
. . . . . . . . . . . 12
                        
            
               |
| 43 | 40, 41, 42 | 3bitr4g 303 |
. . . . . . . . . . 11
    
 
                           
                           |
| 44 | 17, 14, 19, 13, 15 | reschom 16490 |
. . . . . . . . . . . . . 14
    cat
    |
| 45 | 44 | ad2antrr 762 |
. . . . . . . . . . . . 13
    
 
   cat     |
| 46 | 45 | oveqd 6667 |
. . . . . . . . . . . 12
    
 
                     cat
          |
| 47 | 46 | feq3d 6032 |
. . . . . . . . . . 11
    
 
                        
                     cat            |
| 48 | 43, 47 | bitrd 268 |
. . . . . . . . . 10
    
 
                           
                     cat            |
| 49 | 48 | ralrimivva 2971 |
. . . . . . . . 9
 



                           
                     cat            |
| 50 | | fveq2 6191 |
. . . . . . . . . . . . . 14
                 |
| 51 | | df-ov 6653 |
. . . . . . . . . . . . . 14
            |
| 52 | 50, 51 | syl6eqr 2674 |
. . . . . . . . . . . . 13
              |
| 53 | | vex 3203 |
. . . . . . . . . . . . . . . . 17
 |
| 54 | | vex 3203 |
. . . . . . . . . . . . . . . . 17
 |
| 55 | 53, 54 | op1std 7178 |
. . . . . . . . . . . . . . . 16
          |
| 56 | 55 | fveq2d 6195 |
. . . . . . . . . . . . . . 15
                  |
| 57 | 53, 54 | op2ndd 7179 |
. . . . . . . . . . . . . . . 16
          |
| 58 | 57 | fveq2d 6195 |
. . . . . . . . . . . . . . 15
                  |
| 59 | 56, 58 | oveq12d 6668 |
. . . . . . . . . . . . . 14
                                            |
| 60 | | fveq2 6191 |
. . . . . . . . . . . . . . 15
                 |
| 61 | | df-ov 6653 |
. . . . . . . . . . . . . . 15
            |
| 62 | 60, 61 | syl6eqr 2674 |
. . . . . . . . . . . . . 14
              |
| 63 | 59, 62 | oveq12d 6668 |
. . . . . . . . . . . . 13
                                                        |
| 64 | 52, 63 | eleq12d 2695 |
. . . . . . . . . . . 12
                                                                  |
| 65 | | ovex 6678 |
. . . . . . . . . . . . 13
                |
| 66 | | ovex 6678 |
. . . . . . . . . . . . 13
     |
| 67 | 65, 66 | elmap 7886 |
. . . . . . . . . . . 12
                         
                             |
| 68 | 64, 67 | syl6bb 276 |
. . . . . . . . . . 11
                                                                    |
| 69 | 56, 58 | oveq12d 6668 |
. . . . . . . . . . . . . 14
                 cat
                     cat           |
| 70 | 69, 62 | oveq12d 6668 |
. . . . . . . . . . . . 13
                  cat                            cat                |
| 71 | 52, 70 | eleq12d 2695 |
. . . . . . . . . . . 12
                       cat
                               cat
                |
| 72 | | ovex 6678 |
. . . . . . . . . . . . 13
         cat          |
| 73 | 72, 66 | elmap 7886 |
. . . . . . . . . . . 12
               cat                                   cat           |
| 74 | 71, 73 | syl6bb 276 |
. . . . . . . . . . 11
                       cat
                                      cat
           |
| 75 | 68, 74 | bibi12d 335 |
. . . . . . . . . 10
                                                         cat                                                                    cat             |
| 76 | 75 | ralxp 5263 |
. . . . . . . . 9
 
                                                       cat                   

                                                 cat            |
| 77 | 49, 76 | sylibr 224 |
. . . . . . . 8
 

                                                        cat                     |
| 78 | | ralbi 3068 |
. . . . . . . 8
 
                                                       cat                                                                               cat                     |
| 79 | 77, 78 | syl 17 |
. . . . . . 7
 

 
                                                          cat                     |
| 80 | 79 | 3anbi3d 1405 |
. . . . . 6
 

 
  
                                    
 

                      cat                      |
| 81 | | elixp2 7912 |
. . . . . 6
                                  


                                        |
| 82 | | elixp2 7912 |
. . . . . 6
                   cat
                 


                      cat                     |
| 83 | 80, 81, 82 | 3bitr4g 303 |
. . . . 5
 

                                 
                  cat                     |
| 84 | 12 | ad2antrr 762 |
. . . . . . . . 9
     Subcat    |
| 85 | 13 | ad2antrr 762 |
. . . . . . . . 9
         |
| 86 | | eqid 2622 |
. . . . . . . . 9
         |
| 87 | 11 | adantr 481 |
. . . . . . . . . 10
 

      |
| 88 | 87 | ffvelrnda 6359 |
. . . . . . . . 9
           |
| 89 | 17, 84, 85, 86, 88 | subcid 16507 |
. . . . . . . 8
                     
cat            |
| 90 | 89 | eqeq2d 2632 |
. . . . . . 7
                                 
                    
cat             |
| 91 | | eqid 2622 |
. . . . . . . . . . . . . 14
comp  comp   |
| 92 | 17, 14, 19, 13, 15, 91 | rescco 16492 |
. . . . . . . . . . . . 13
 comp  comp  cat     |
| 93 | 92 | ad2antrr 762 |
. . . . . . . . . . . 12
     comp  comp  cat
    |
| 94 | 93 | oveqd 6667 |
. . . . . . . . . . 11
                  comp                     comp  cat           |
| 95 | 94 | oveqd 6667 |
. . . . . . . . . 10
                            comp                                         comp  cat
                    |
| 96 | 95 | eqeq2d 2632 |
. . . . . . . . 9
                    comp                              comp                                comp                              comp  cat                      |
| 97 | 96 | 2ralbidv 2989 |
. . . . . . . 8
      
                         comp                              comp                  
                         comp                              comp  cat                      |
| 98 | 97 | 2ralbidv 2989 |
. . . . . . 7
      


                         comp                              comp                  


                         comp                              comp  cat                      |
| 99 | 90, 98 | anbi12d 747 |
. . . . . 6
                                    

     
                   comp                              comp                                        
cat          

                          comp                              comp  cat                       |
| 100 | 99 | ralbidva 2985 |
. . . . 5
 

 
                              

     
                   comp                              comp                                          cat          

                          comp                              comp  cat                       |
| 101 | 24, 83, 100 | 3anbi123d 1399 |
. . . 4
 

                                           
                             

                          comp                              comp                   
         cat  
                  cat                  
                      cat         


                          comp                              comp  cat                        |
| 102 | | funcres2b.a |
. . . . 5
     |
| 103 | | funcres2b.h |
. . . . 5
    |
| 104 | | eqid 2622 |
. . . . 5
         |
| 105 | | eqid 2622 |
. . . . 5
comp  comp   |
| 106 | | simpr 477 |
. . . . 5
 

  |
| 107 | 19 | adantr 481 |
. . . . 5
 

  |
| 108 | 102, 14, 103, 31, 104, 86, 105, 91, 106, 107 | isfunc 16524 |
. . . 4
 

    
        
                                

                             

                          comp                              comp                       |
| 109 | | eqid 2622 |
. . . . 5
    cat
      cat
   |
| 110 | | eqid 2622 |
. . . . 5
   cat
     cat
   |
| 111 | | eqid 2622 |
. . . . 5
    cat       cat    |
| 112 | | eqid 2622 |
. . . . 5
comp 
cat   comp  cat    |
| 113 | 17, 12 | subccat 16508 |
. . . . . 6
  cat
   |
| 114 | 113 | adantr 481 |
. . . . 5
 

 cat    |
| 115 | 102, 109,
103, 110, 104, 111, 105, 112, 106, 114 | isfunc 16524 |
. . . 4
 

    cat             cat                     cat
                

                      cat         


                          comp                              comp  cat                        |
| 116 | 101, 108,
115 | 3bitr4d 300 |
. . 3
 

    
   cat       |
| 117 | 116 | ex 450 |
. 2
      
   cat        |
| 118 | 5, 10, 117 | pm5.21ndd 369 |
1
     
   cat       |