| Step | Hyp | Ref
| Expression |
| 1 | | acongrep 37547 |
. . . 4
 
                    |
| 2 | 1 | ad2ant2l 782 |
. . 3
      
   
         
   
     |
| 3 | | acongrep 37547 |
. . . . . . 7
 
                    |
| 4 | 3 | ad2ant2lr 784 |
. . . . . 6
      
   
                   |
| 5 | | 2z 11409 |
. . . . . . . . . . 11
 |
| 6 | | simpl1l 1112 |
. . . . . . . . . . . 12
        


                   
                   Xrm    Yrm   Yrm   
Xrm    Yrm    Yrm         
   |
| 7 | | nnz 11399 |
. . . . . . . . . . . . 13
   |
| 8 | 7 | adantl 482 |
. . . . . . . . . . . 12
         |
| 9 | 6, 8 | syl 17 |
. . . . . . . . . . 11
        


                   
                   Xrm    Yrm   Yrm   
Xrm    Yrm    Yrm    
  |
| 10 | | zmulcl 11426 |
. . . . . . . . . . 11
 
     |
| 11 | 5, 9, 10 | sylancr 695 |
. . . . . . . . . 10
        


                   
                   Xrm    Yrm   Yrm   
Xrm    Yrm    Yrm         |
| 12 | | simplrl 800 |
. . . . . . . . . . 11
       
      Xrm    Yrm   Yrm    Xrm   
Yrm   
Yrm       |
| 13 | 12 | 3ad2antl1 1223 |
. . . . . . . . . 10
        


                   
                   Xrm    Yrm   Yrm   
Xrm    Yrm    Yrm    
  |
| 14 | | simpl3l 1116 |
. . . . . . . . . . 11
        


                   
                   Xrm    Yrm   Yrm   
Xrm    Yrm    Yrm    
      |
| 15 | | elfzelz 12342 |
. . . . . . . . . . 11
       |
| 16 | 14, 15 | syl 17 |
. . . . . . . . . 10
        


                   
                   Xrm    Yrm   Yrm   
Xrm    Yrm    Yrm    
  |
| 17 | | simplrr 801 |
. . . . . . . . . . 11
       
      Xrm    Yrm   Yrm    Xrm   
Yrm   
Yrm       |
| 18 | 17 | 3ad2antl1 1223 |
. . . . . . . . . 10
        


                   
                   Xrm    Yrm   Yrm   
Xrm    Yrm    Yrm    
  |
| 19 | | simpl2r 1115 |
. . . . . . . . . . . 12
        


                   
                   Xrm    Yrm   Yrm   
Xrm    Yrm    Yrm                  |
| 20 | | simpl2l 1114 |
. . . . . . . . . . . . . 14
        


                   
                   Xrm    Yrm   Yrm   
Xrm    Yrm    Yrm           |
| 21 | | simplll 798 |
. . . . . . . . . . . . . . . . 17
       
      Xrm    Yrm   Yrm    Xrm   
Yrm   
Yrm           |
| 22 | 21 | 3ad2antl1 1223 |
. . . . . . . . . . . . . . . 16
        


                   
                   Xrm    Yrm   Yrm   
Xrm    Yrm    Yrm    
      |
| 23 | | frmx 37478 |
. . . . . . . . . . . . . . . . . 18
Xrm
          |
| 24 | 23 | fovcl 6765 |
. . . . . . . . . . . . . . . . 17
        Xrm    |
| 25 | 24 | nn0zd 11480 |
. . . . . . . . . . . . . . . 16
        Xrm    |
| 26 | 22, 9, 25 | syl2anc 693 |
. . . . . . . . . . . . . . 15
        


                   
                   Xrm    Yrm   Yrm   
Xrm    Yrm    Yrm     
Xrm    |
| 27 | | elfzelz 12342 |
. . . . . . . . . . . . . . . . 17
       |
| 28 | 20, 27 | syl 17 |
. . . . . . . . . . . . . . . 16
        


                   
                   Xrm    Yrm   Yrm   
Xrm    Yrm    Yrm       |
| 29 | | frmy 37479 |
. . . . . . . . . . . . . . . . 17
Yrm
          |
| 30 | 29 | fovcl 6765 |
. . . . . . . . . . . . . . . 16
        Yrm    |
| 31 | 22, 28, 30 | syl2anc 693 |
. . . . . . . . . . . . . . 15
        


                   
                   Xrm    Yrm   Yrm   
Xrm    Yrm    Yrm     
Yrm    |
| 32 | 29 | fovcl 6765 |
. . . . . . . . . . . . . . . 16
        Yrm    |
| 33 | 22, 18, 32 | syl2anc 693 |
. . . . . . . . . . . . . . 15
        


                   
                   Xrm    Yrm   Yrm   
Xrm    Yrm    Yrm     
Yrm    |
| 34 | 29 | fovcl 6765 |
. . . . . . . . . . . . . . . 16
        Yrm    |
| 35 | 22, 16, 34 | syl2anc 693 |
. . . . . . . . . . . . . . 15
        


                   
                   Xrm    Yrm   Yrm   
Xrm    Yrm    Yrm     
Yrm    |
| 36 | 29 | fovcl 6765 |
. . . . . . . . . . . . . . . . 17
        Yrm    |
| 37 | 22, 13, 36 | syl2anc 693 |
. . . . . . . . . . . . . . . 16
        


                   
                   Xrm    Yrm   Yrm   
Xrm    Yrm    Yrm     
Yrm    |
| 38 | | jm2.26a 37567 |
. . . . . . . . . . . . . . . . . 18
      
   
   
          Xrm    Yrm   Yrm    Xrm   
Yrm   
Yrm       |
| 39 | 22, 9, 28, 13, 38 | syl22anc 1327 |
. . . . . . . . . . . . . . . . 17
        


                   
                   Xrm    Yrm   Yrm   
Xrm    Yrm    Yrm                  
Xrm    Yrm   Yrm    Xrm    Yrm    Yrm       |
| 40 | 19, 39 | mpd 15 |
. . . . . . . . . . . . . . . 16
        


                   
                   Xrm    Yrm   Yrm   
Xrm    Yrm    Yrm       Xrm    Yrm   Yrm    Xrm   
Yrm   
Yrm      |
| 41 | | simpr 477 |
. . . . . . . . . . . . . . . 16
        


                   
                   Xrm    Yrm   Yrm   
Xrm    Yrm    Yrm       Xrm    Yrm   Yrm    Xrm   
Yrm   
Yrm      |
| 42 | | acongtr 37545 |
. . . . . . . . . . . . . . . 16
    Xrm   Yrm     Yrm  
Yrm      Xrm    Yrm   Yrm    Xrm   
Yrm   
Yrm      Xrm   
Yrm  
Yrm    Xrm    Yrm    Yrm       
Xrm    Yrm   Yrm    Xrm    Yrm    Yrm      |
| 43 | 26, 31, 37, 33, 40, 41, 42 | syl222anc 1342 |
. . . . . . . . . . . . . . 15
        


                   
                   Xrm    Yrm   Yrm   
Xrm    Yrm    Yrm       Xrm    Yrm   Yrm    Xrm   
Yrm   
Yrm      |
| 44 | | simpl3r 1117 |
. . . . . . . . . . . . . . . . 17
        


                   
                   Xrm    Yrm   Yrm   
Xrm    Yrm    Yrm                  |
| 45 | | acongsym 37543 |
. . . . . . . . . . . . . . . . 17
    
                
  
      |
| 46 | 11, 16, 18, 44, 45 | syl31anc 1329 |
. . . . . . . . . . . . . . . 16
        


                   
                   Xrm    Yrm   Yrm   
Xrm    Yrm    Yrm        
  
      |
| 47 | | jm2.26a 37567 |
. . . . . . . . . . . . . . . . 17
      
   
   
          Xrm    Yrm   Yrm    Xrm   
Yrm   
Yrm       |
| 48 | 22, 9, 18, 16, 47 | syl22anc 1327 |
. . . . . . . . . . . . . . . 16
        


                   
                   Xrm    Yrm   Yrm   
Xrm    Yrm    Yrm         
   
    
Xrm    Yrm   Yrm    Xrm    Yrm    Yrm       |
| 49 | 46, 48 | mpd 15 |
. . . . . . . . . . . . . . 15
        


                   
                   Xrm    Yrm   Yrm   
Xrm    Yrm    Yrm       Xrm    Yrm   Yrm    Xrm   
Yrm   
Yrm      |
| 50 | | acongtr 37545 |
. . . . . . . . . . . . . . 15
    Xrm   Yrm     Yrm  
Yrm      Xrm    Yrm   Yrm    Xrm   
Yrm   
Yrm      Xrm   
Yrm  
Yrm    Xrm    Yrm    Yrm       
Xrm    Yrm   Yrm    Xrm    Yrm    Yrm      |
| 51 | 26, 31, 33, 35, 43, 49, 50 | syl222anc 1342 |
. . . . . . . . . . . . . 14
        


                   
                   Xrm    Yrm   Yrm   
Xrm    Yrm    Yrm       Xrm    Yrm   Yrm    Xrm   
Yrm   
Yrm      |
| 52 | | jm2.26lem3 37568 |
. . . . . . . . . . . . . 14
      
             Xrm   
Yrm  
Yrm    Xrm    Yrm    Yrm    
  |
| 53 | 6, 20, 14, 51, 52 | syl121anc 1331 |
. . . . . . . . . . . . 13
        


                   
                   Xrm    Yrm   Yrm   
Xrm    Yrm    Yrm       |
| 54 | | id 22 |
. . . . . . . . . . . . . 14
   |
| 55 | | eqidd 2623 |
. . . . . . . . . . . . . 14
   |
| 56 | 54, 55 | acongeq12d 37546 |
. . . . . . . . . . . . 13
            
              |
| 57 | 53, 56 | syl 17 |
. . . . . . . . . . . 12
        


                   
                   Xrm    Yrm   Yrm   
Xrm    Yrm    Yrm                
              |
| 58 | 19, 57 | mpbid 222 |
. . . . . . . . . . 11
        


                   
                   Xrm    Yrm   Yrm   
Xrm    Yrm    Yrm                  |
| 59 | | acongsym 37543 |
. . . . . . . . . . 11
    
                
  
      |
| 60 | 11, 16, 13, 58, 59 | syl31anc 1329 |
. . . . . . . . . 10
        


                   
                   Xrm    Yrm   Yrm   
Xrm    Yrm    Yrm        
  
      |
| 61 | | acongtr 37545 |
. . . . . . . . . 10
            
  
       
   
        
   
     |
| 62 | 11, 13, 16, 18, 60, 44, 61 | syl222anc 1342 |
. . . . . . . . 9
        


                   
                   Xrm    Yrm   Yrm   
Xrm    Yrm    Yrm        
  
      |
| 63 | 62 | 3exp1 1283 |
. . . . . . . 8
      
   
                       
               Xrm   
Yrm  
Yrm    Xrm    Yrm    Yrm       
   
        |
| 64 | 63 | expd 452 |
. . . . . . 7
      
   
    
   
             
               Xrm   
Yrm  
Yrm    Xrm    Yrm    Yrm       
   
         |
| 65 | 64 | rexlimdv 3030 |
. . . . . 6
      
   
 
       
             
               Xrm   
Yrm  
Yrm    Xrm    Yrm    Yrm       
   
        |
| 66 | 4, 65 | mpd 15 |
. . . . 5
      
   
                     Xrm    Yrm   Yrm   
Xrm    Yrm    Yrm      
            |
| 67 | 66 | expd 452 |
. . . 4
      
   
    
   
           Xrm    Yrm   Yrm   
Xrm    Yrm    Yrm      
             |
| 68 | 67 | rexlimdv 3030 |
. . 3
      
   
 
       
           Xrm    Yrm   Yrm   
Xrm    Yrm    Yrm      
            |
| 69 | 2, 68 | mpd 15 |
. 2
      
   
  
Xrm    Yrm   Yrm    Xrm    Yrm    Yrm       
   
      |
| 70 | | jm2.26a 37567 |
. . 3
      
   
   
          Xrm    Yrm   Yrm    Xrm   
Yrm   
Yrm       |
| 71 | 7, 70 | sylanl2 683 |
. 2
      
   
   
          Xrm    Yrm   Yrm    Xrm   
Yrm   
Yrm       |
| 72 | 69, 71 | impbid 202 |
1
      
   
  
Xrm    Yrm   Yrm    Xrm    Yrm    Yrm       
  
       |