Proof of Theorem isotrALT
| Step | Hyp | Ref
| Expression |
| 1 | | simpl 346 |
. . . . . 6
      

                     |
| 2 | | simpl 346 |
. . . . . 6
      

                     |
| 3 | 1, 2 | anim12i 360 |
. . . . 5
       

                    

                            |
| 4 | 3 | ancoms 484 |
. . . 4
       

                    

                            |
| 5 | | f1oco 4661 |
. . . 4
                   |
| 6 | 4, 5 | syl 12 |
. . 3
       

                    

                        |
| 7 | | ax-17 1317 |
. . . . . 6
            |
| 8 | | hbra1 2147 |
. . . . . 6
                   

                |
| 9 | 7, 8 | hban 1356 |
. . . . 5
      

                                         |
| 10 | | ax-17 1317 |
. . . . 5
      

                                         |
| 11 | 9, 10 | hban 1356 |
. . . 4
       

                    

                        

                    

                  |
| 12 | | ax-17 1317 |
. . . . . . 7
            |
| 13 | | ax-17 1317 |
. . . . . . . 8

   |
| 14 | | hbra1 2147 |
. . . . . . . 8
                                   |
| 15 | 13, 14 | hbral 2146 |
. . . . . . 7
                    
                |
| 16 | 12, 15 | hban 1356 |
. . . . . 6
      

                                         |
| 17 | | ax-17 1317 |
. . . . . 6
      

                                         |
| 18 | 16, 17 | hban 1356 |
. . . . 5
       

                    

                        

                    

                  |
| 19 | | f1of 4635 |
. . . . . . . . . . 11
           |
| 20 | | ffvelrn 4787 |
. . . . . . . . . . . . 13
     
       |
| 21 | 20 | ex 402 |
. . . . . . . . . . . 12
             |
| 22 | | ffvelrn 4787 |
. . . . . . . . . . . . 13
     
       |
| 23 | 22 | ex 402 |
. . . . . . . . . . . 12
             |
| 24 | 21, 23 | anim12d 617 |
. . . . . . . . . . 11
            
        |
| 25 | 19, 24 | syl 12 |
. . . . . . . . . 10
            
        |
| 26 | 25 | adantr 425 |
. . . . . . . . 9
      

                      
        |
| 27 | | breq1 3341 |
. . . . . . . . . . . . 13
                 |
| 28 | | fveq2 4681 |
. . . . . . . . . . . . . 14
                   |
| 29 | 28 | breq1d 3348 |
. . . . . . . . . . . . 13
                                 |
| 30 | 27, 29 | bibi12d 691 |
. . . . . . . . . . . 12
                                             |
| 31 | | breq2 3342 |
. . . . . . . . . . . . 13
                         |
| 32 | | fveq2 4681 |
. . . . . . . . . . . . . 14
                   |
| 33 | 32 | breq2d 3350 |
. . . . . . . . . . . . 13
                                         |
| 34 | 31, 33 | bibi12d 691 |
. . . . . . . . . . . 12
                                                             |
| 35 | 30, 34 | rcla42v 2384 |
. . . . . . . . . . 11
             
                                               |
| 36 | 35 | com12 14 |
. . . . . . . . . 10
                                                             |
| 37 | 36 | adantl 424 |
. . . . . . . . 9
      

                                                           |
| 38 | 26, 37 | sylan9 517 |
. . . . . . . 8
       

                    

                                                    |
| 39 | 38 | imp 377 |
. . . . . . 7
                                                
                                  |
| 40 | | ra42 2157 |
. . . . . . . . . 10
                                     |
| 41 | 40 | imp 377 |
. . . . . . . . 9
                                     |
| 42 | 41 | adantll 428 |
. . . . . . . 8
       

                                  |
| 43 | 42 | adantlr 429 |
. . . . . . 7
                                                
                  |
| 44 | | fvco3 4739 |
. . . . . . . . . . . 12
     
                 |
| 45 | 44 | 3expa 1067 |
. . . . . . . . . . 11
                         |
| 46 | | fvco3 4739 |
. . . . . . . . . . . 12
     
                 |
| 47 | 46 | 3expa 1067 |
. . . . . . . . . . 11
                         |
| 48 | 45, 47 | breqan12d 3354 |
. . . . . . . . . 10
                                                       |
| 49 | 48 | anandis 570 |
. . . . . . . . 9
                                               |
| 50 | | f1ofun 4637 |
. . . . . . . . . 10
       |
| 51 | 50, 19 | anim12i 360 |
. . . . . . . . 9
                   |
| 52 | 49, 51 | sylan 497 |
. . . . . . . 8
                                                   |
| 53 | 52, 4 | sylan 497 |
. . . . . . 7
                                                
                                      |
| 54 | 39, 43, 53 | 3bitr4d 609 |
. . . . . 6
                                                
                      |
| 55 | 54 | exp32 408 |
. . . . 5
       

                    

                                        |
| 56 | 18, 13, 55 | r19.21ad 2180 |
. . . 4
       

                    

                 
                     |
| 57 | 11, 56 | r19.21ai 2174 |
. . 3
       

                    

                                      |
| 58 | 6, 57 | jca 310 |
. 2
       

                    

                       

                     |
| 59 | | df-iso 4015 |
. . 3
          

                 |
| 60 | | df-iso 4015 |
. . 3
          

                 |
| 61 | 59, 60 | anbi12i 540 |
. 2
  
              

                    

                  |
| 62 | | df-iso 4015 |
. 2
              

                     |
| 63 | 58, 61, 62 | 3imtr4i 236 |
1
  
                |