| Step | Hyp | Ref
| Expression |
| 1 | | bezoutlemstep.is-bezout |
. . . 4
  
        |
| 2 | | bezoutlemstep.a |
. . . 4

  |
| 3 | | bezoutlemstep.b |
. . . 4

  |
| 4 | | bezoutlemstep.w |
. . . 4

  |
| 5 | | bezoutlemstep.y-is-bezout |
. . . 4
   ![] ]](rbrack.gif)   |
| 6 | | bezoutlemstep.y-nn0 |
. . . 4

  |
| 7 | | bezoutlemstep.w-is-bezout |
. . . 4
   ![]. ].](_drbrack.gif)   |
| 8 | 1, 2, 3, 4, 5, 6, 7 | bezoutlemnewy 12163 |
. . 3
     ![]. ].](_drbrack.gif)   |
| 9 | | bezoutlemstep.hyp |
. . 3
   
  ![]. ].](_drbrack.gif)        ![]. ].](_drbrack.gif)   ![]. ].](_drbrack.gif)    |
| 10 | 8, 9 | mpdan 421 |
. 2
       ![]. ].](_drbrack.gif)   ![]. ].](_drbrack.gif)    |
| 11 | | bezoutlemstep.thr |
. . 3
   |
| 12 | | eqidd 2197 |
. . . . . 6
         ![]. ].](_drbrack.gif)   ![]. ].](_drbrack.gif)         |
| 13 | 6 | nn0zd 9446 |
. . . . . . . 8

  |
| 14 | 13 | ad2antrr 488 |
. . . . . . 7
         ![]. ].](_drbrack.gif)   ![]. ].](_drbrack.gif)     |
| 15 | 4 | ad2antrr 488 |
. . . . . . 7
         ![]. ].](_drbrack.gif)   ![]. ].](_drbrack.gif)     |
| 16 | 13, 4 | zmodcld 10437 |
. . . . . . . 8
     |
| 17 | 16 | ad2antrr 488 |
. . . . . . 7
         ![]. ].](_drbrack.gif)   ![]. ].](_drbrack.gif)       |
| 18 | | zq 9700 |
. . . . . . . . 9
   |
| 19 | 14, 18 | syl 14 |
. . . . . . . 8
         ![]. ].](_drbrack.gif)   ![]. ].](_drbrack.gif)     |
| 20 | 15 | nnzd 9447 |
. . . . . . . . 9
         ![]. ].](_drbrack.gif)   ![]. ].](_drbrack.gif)     |
| 21 | | zq 9700 |
. . . . . . . . 9
   |
| 22 | 20, 21 | syl 14 |
. . . . . . . 8
         ![]. ].](_drbrack.gif)   ![]. ].](_drbrack.gif)     |
| 23 | 15 | nngt0d 9034 |
. . . . . . . 8
         ![]. ].](_drbrack.gif)   ![]. ].](_drbrack.gif)     |
| 24 | | modqlt 10425 |
. . . . . . . 8
 
 
   |
| 25 | 19, 22, 23, 24 | syl3anc 1249 |
. . . . . . 7
         ![]. ].](_drbrack.gif)   ![]. ].](_drbrack.gif)       |
| 26 | | modremain 12094 |
. . . . . . 7
 
    
 
 
  
          |
| 27 | 14, 15, 17, 25, 26 | syl112anc 1253 |
. . . . . 6
         ![]. ].](_drbrack.gif)   ![]. ].](_drbrack.gif)                  |
| 28 | 12, 27 | mpbid 147 |
. . . . 5
         ![]. ].](_drbrack.gif)   ![]. ].](_drbrack.gif)            |
| 29 | | simplrl 535 |
. . . . . . . . . . . . . 14
   
      ![]. ].](_drbrack.gif)   ![]. ].](_drbrack.gif)  
             ![]. ].](_drbrack.gif)   ![]. ].](_drbrack.gif)   |
| 30 | | bezoutlemstep.thx |
. . . . . . . . . . . . . . . . 17
   |
| 31 | | bezoutlemstep.sub-gcd |
. . . . . . . . . . . . . . . . . . 19
  
     |
| 32 | 31 | sbcbii 3049 |
. . . . . . . . . . . . . . . . . 18
   ![]. ].](_drbrack.gif)   ![]. ].](_drbrack.gif) 
 
    |
| 33 | | breq2 4037 |
. . . . . . . . . . . . . . . . . . . . . . 23
 
   |
| 34 | 33 | anbi2d 464 |
. . . . . . . . . . . . . . . . . . . . . 22
  
 
    |
| 35 | 34 | imbi2d 230 |
. . . . . . . . . . . . . . . . . . . . 21
   
         |
| 36 | 35 | ralbidv 2497 |
. . . . . . . . . . . . . . . . . . . 20
  
 
    
     |
| 37 | 36 | sbcieg 3022 |
. . . . . . . . . . . . . . . . . . 19
  
 ![]. ].](_drbrack.gif)   
    
     |
| 38 | 4, 37 | syl 14 |
. . . . . . . . . . . . . . . . . 18
    ![]. ].](_drbrack.gif)     
        |
| 39 | 32, 38 | bitrid 192 |
. . . . . . . . . . . . . . . . 17
    ![]. ].](_drbrack.gif)
        |
| 40 | 30, 39 | sbcbid 3047 |
. . . . . . . . . . . . . . . 16
      ![]. ].](_drbrack.gif)   ![]. ].](_drbrack.gif)
    ![]. ].](_drbrack.gif)         |
| 41 | | breq2 4037 |
. . . . . . . . . . . . . . . . . . . . 21
   
     |
| 42 | 41 | anbi1d 465 |
. . . . . . . . . . . . . . . . . . . 20
    
  

    |
| 43 | 42 | imbi2d 230 |
. . . . . . . . . . . . . . . . . . 19
     
     
     |
| 44 | 43 | ralbidv 2497 |
. . . . . . . . . . . . . . . . . 18
    
 
     

     |
| 45 | 44 | sbcieg 3022 |
. . . . . . . . . . . . . . . . 17
  
     ![]. ].](_drbrack.gif) 
 
     

     |
| 46 | 16, 45 | syl 14 |
. . . . . . . . . . . . . . . 16
      ![]. ].](_drbrack.gif)     
    
     |
| 47 | 40, 46 | bitrd 188 |
. . . . . . . . . . . . . . 15
      ![]. ].](_drbrack.gif)   ![]. ].](_drbrack.gif)
    
     |
| 48 | 47 | ad3antrrr 492 |
. . . . . . . . . . . . . 14
   
      ![]. ].](_drbrack.gif)   ![]. ].](_drbrack.gif)  
              ![]. ].](_drbrack.gif)   ![]. ].](_drbrack.gif)    

     |
| 49 | 29, 48 | mpbid 147 |
. . . . . . . . . . . . 13
   
      ![]. ].](_drbrack.gif)   ![]. ].](_drbrack.gif)  
         
  

    |
| 50 | 49 | r19.21bi 2585 |
. . . . . . . . . . . 12
        
  ![]. ].](_drbrack.gif)   ![]. ].](_drbrack.gif)             
       |
| 51 | 50 | imp 124 |
. . . . . . . . . . 11
            ![]. ].](_drbrack.gif)   ![]. ].](_drbrack.gif)           
   

   |
| 52 | 51 | simprd 114 |
. . . . . . . . . 10
            ![]. ].](_drbrack.gif)   ![]. ].](_drbrack.gif)           
 
  |
| 53 | | simplr 528 |
. . . . . . . . . . . . . . 15
            ![]. ].](_drbrack.gif)   ![]. ].](_drbrack.gif)           
    |
| 54 | 53 | nn0zd 9446 |
. . . . . . . . . . . . . 14
            ![]. ].](_drbrack.gif)   ![]. ].](_drbrack.gif)           
    |
| 55 | | simprl 529 |
. . . . . . . . . . . . . . 15
   
      ![]. ].](_drbrack.gif)   ![]. ].](_drbrack.gif)  
           |
| 56 | 55 | ad2antrr 488 |
. . . . . . . . . . . . . 14
            ![]. ].](_drbrack.gif)   ![]. ].](_drbrack.gif)           
    |
| 57 | 20 | ad3antrrr 492 |
. . . . . . . . . . . . . 14
            ![]. ].](_drbrack.gif)   ![]. ].](_drbrack.gif)           
 
  |
| 58 | | dvdsmultr2 11998 |
. . . . . . . . . . . . . 14
 
 
     |
| 59 | 54, 56, 57, 58 | syl3anc 1249 |
. . . . . . . . . . . . 13
            ![]. ].](_drbrack.gif)   ![]. ].](_drbrack.gif)           
        |
| 60 | 52, 59 | mpd 13 |
. . . . . . . . . . . 12
            ![]. ].](_drbrack.gif)   ![]. ].](_drbrack.gif)           
 
    |
| 61 | 51 | simpld 112 |
. . . . . . . . . . . 12
            ![]. ].](_drbrack.gif)   ![]. ].](_drbrack.gif)           
 
    |
| 62 | 56, 57 | zmulcld 9454 |
. . . . . . . . . . . . 13
            ![]. ].](_drbrack.gif)   ![]. ].](_drbrack.gif)           
      |
| 63 | 17 | ad3antrrr 492 |
. . . . . . . . . . . . . 14
            ![]. ].](_drbrack.gif)   ![]. ].](_drbrack.gif)           
      |
| 64 | 63 | nn0zd 9446 |
. . . . . . . . . . . . 13
            ![]. ].](_drbrack.gif)   ![]. ].](_drbrack.gif)           
      |
| 65 | | dvds2add 11990 |
. . . . . . . . . . . . 13
                       |
| 66 | 54, 62, 64, 65 | syl3anc 1249 |
. . . . . . . . . . . 12
            ![]. ].](_drbrack.gif)   ![]. ].](_drbrack.gif)           
     
            |
| 67 | 60, 61, 66 | mp2and 433 |
. . . . . . . . . . 11
            ![]. ].](_drbrack.gif)   ![]. ].](_drbrack.gif)           
 
        |
| 68 | | simprr 531 |
. . . . . . . . . . . 12
   
      ![]. ].](_drbrack.gif)   ![]. ].](_drbrack.gif)  
                 |
| 69 | 68 | ad2antrr 488 |
. . . . . . . . . . 11
            ![]. ].](_drbrack.gif)   ![]. ].](_drbrack.gif)           
          |
| 70 | 67, 69 | breqtrd 4059 |
. . . . . . . . . 10
            ![]. ].](_drbrack.gif)   ![]. ].](_drbrack.gif)           
 
  |
| 71 | 52, 70 | jca 306 |
. . . . . . . . 9
            ![]. ].](_drbrack.gif)   ![]. ].](_drbrack.gif)           
  
   |
| 72 | 71 | ex 115 |
. . . . . . . 8
        
  ![]. ].](_drbrack.gif)   ![]. ].](_drbrack.gif)             
     |
| 73 | 72 | ralrimiva 2570 |
. . . . . . 7
   
      ![]. ].](_drbrack.gif)   ![]. ].](_drbrack.gif)  
         
 
    |
| 74 | 31 | sbcbii 3049 |
. . . . . . . . 9
   ![]. ].](_drbrack.gif)   ![]. ].](_drbrack.gif) 
 
    |
| 75 | | breq2 4037 |
. . . . . . . . . . . . . 14
 
   |
| 76 | 75 | anbi1d 465 |
. . . . . . . . . . . . 13
  
 
    |
| 77 | 76 | imbi2d 230 |
. . . . . . . . . . . 12
   
         |
| 78 | 77 | ralbidv 2497 |
. . . . . . . . . . 11
  
 
    
     |
| 79 | 78 | sbcieg 3022 |
. . . . . . . . . 10
  
 ![]. ].](_drbrack.gif)   
    
     |
| 80 | 4, 79 | syl 14 |
. . . . . . . . 9
    ![]. ].](_drbrack.gif)     
        |
| 81 | 74, 80 | bitrid 192 |
. . . . . . . 8
    ![]. ].](_drbrack.gif)
        |
| 82 | 81 | ad3antrrr 492 |
. . . . . . 7
   
      ![]. ].](_drbrack.gif)   ![]. ].](_drbrack.gif)  
            ![]. ].](_drbrack.gif)   
     |
| 83 | 73, 82 | mpbird 167 |
. . . . . 6
   
      ![]. ].](_drbrack.gif)   ![]. ].](_drbrack.gif)  
         
 ![]. ].](_drbrack.gif)   |
| 84 | | simplrr 536 |
. . . . . 6
   
      ![]. ].](_drbrack.gif)   ![]. ].](_drbrack.gif)  
           |
| 85 | 83, 84 | jca 306 |
. . . . 5
   
      ![]. ].](_drbrack.gif)   ![]. ].](_drbrack.gif)  
            ![]. ].](_drbrack.gif)    |
| 86 | 28, 85 | rexlimddv 2619 |
. . . 4
         ![]. ].](_drbrack.gif)   ![]. ].](_drbrack.gif)      ![]. ].](_drbrack.gif)    |
| 87 | 86 | exp31 364 |
. . 3
     
  ![]. ].](_drbrack.gif)   ![]. ].](_drbrack.gif)   
 ![]. ].](_drbrack.gif)      |
| 88 | 11, 87 | reximdai 2595 |
. 2
     
  ![]. ].](_drbrack.gif)   ![]. ].](_drbrack.gif)      ![]. ].](_drbrack.gif)     |
| 89 | 10, 88 | mpd 13 |
1
     ![]. ].](_drbrack.gif)    |