| Step | Hyp | Ref
| Expression |
| 1 | | elpell1qr 37411 |
. . 3
  ◻NN  Pell1QR 
                             |
| 2 | | 1red 10055 |
. . . . . . . . 9
    
◻NN  
       
      
  |
| 3 | | simplrl 800 |
. . . . . . . . . 10
    
◻NN  
       
      
  |
| 4 | 3 | nn0red 11352 |
. . . . . . . . 9
    
◻NN  
       
      
  |
| 5 | | eldifi 3732 |
. . . . . . . . . . . . . . 15
  ◻NN
  |
| 6 | 5 | ad3antrrr 766 |
. . . . . . . . . . . . . 14
    
◻NN  
       
      
  |
| 7 | 6 | nnnn0d 11351 |
. . . . . . . . . . . . 13
    
◻NN  
       
      
  |
| 8 | 7 | nn0red 11352 |
. . . . . . . . . . . 12
    
◻NN  
       
      
  |
| 9 | 7 | nn0ge0d 11354 |
. . . . . . . . . . . 12
    
◻NN  
       
      
  |
| 10 | 8, 9 | resqrtcld 14156 |
. . . . . . . . . . 11
    
◻NN  
       
      
      |
| 11 | | simplrr 801 |
. . . . . . . . . . . 12
    
◻NN  
       
      
  |
| 12 | 11 | nn0red 11352 |
. . . . . . . . . . 11
    
◻NN  
       
      
  |
| 13 | 10, 12 | remulcld 10070 |
. . . . . . . . . 10
    
◻NN  
       
      
        |
| 14 | 4, 13 | readdcld 10069 |
. . . . . . . . 9
    
◻NN  
       
      
          |
| 15 | | 2nn0 11309 |
. . . . . . . . . . . . . . . 16
 |
| 16 | 15 | a1i 11 |
. . . . . . . . . . . . . . 15
    
◻NN  
       
      
  |
| 17 | 11, 16 | nn0expcld 13031 |
. . . . . . . . . . . . . 14
    
◻NN  
       
      
      |
| 18 | 7, 17 | nn0mulcld 11356 |
. . . . . . . . . . . . 13
    
◻NN  
       
      
        |
| 19 | 18 | nn0ge0d 11354 |
. . . . . . . . . . . 12
    
◻NN  
       
      
        |
| 20 | 18 | nn0red 11352 |
. . . . . . . . . . . . 13
    
◻NN  
       
      
        |
| 21 | 2, 20 | addge02d 10616 |
. . . . . . . . . . . 12
    
◻NN  
       
      
      
           |
| 22 | 19, 21 | mpbid 222 |
. . . . . . . . . . 11
    
◻NN  
       
      
          |
| 23 | | sq1 12958 |
. . . . . . . . . . . 12
     |
| 24 | 23 | a1i 11 |
. . . . . . . . . . 11
    
◻NN  
       
      
      |
| 25 | | nn0cn 11302 |
. . . . . . . . . . . . . . . 16

  |
| 26 | 25 | ad2antrl 764 |
. . . . . . . . . . . . . . 15
   
◻NN  
    |
| 27 | 26 | sqcld 13006 |
. . . . . . . . . . . . . 14
   
◻NN  
        |
| 28 | 5 | ad2antrr 762 |
. . . . . . . . . . . . . . . 16
   
◻NN  
    |
| 29 | 28 | nncnd 11036 |
. . . . . . . . . . . . . . 15
   
◻NN  
    |
| 30 | | nn0cn 11302 |
. . . . . . . . . . . . . . . . 17

  |
| 31 | 30 | ad2antll 765 |
. . . . . . . . . . . . . . . 16
   
◻NN  
    |
| 32 | 31 | sqcld 13006 |
. . . . . . . . . . . . . . 15
   
◻NN  
        |
| 33 | 29, 32 | mulcld 10060 |
. . . . . . . . . . . . . 14
   
◻NN  
          |
| 34 | | 1cnd 10056 |
. . . . . . . . . . . . . 14
   
◻NN  
    |
| 35 | 27, 33, 34 | subaddd 10410 |
. . . . . . . . . . . . 13
   
◻NN  
                              |
| 36 | 35 | biimpa 501 |
. . . . . . . . . . . 12
    
◻NN  
       
      
 
            |
| 37 | 36 | eqcomd 2628 |
. . . . . . . . . . 11
    
◻NN  
       
      
              |
| 38 | 22, 24, 37 | 3brtr4d 4685 |
. . . . . . . . . 10
    
◻NN  
       
      
          |
| 39 | | 0le1 10551 |
. . . . . . . . . . . 12
 |
| 40 | 39 | a1i 11 |
. . . . . . . . . . 11
    
◻NN  
       
      
  |
| 41 | 3 | nn0ge0d 11354 |
. . . . . . . . . . 11
    
◻NN  
       
      
  |
| 42 | 2, 4, 40, 41 | le2sqd 13044 |
. . . . . . . . . 10
    
◻NN  
       
      

           |
| 43 | 38, 42 | mpbird 247 |
. . . . . . . . 9
    
◻NN  
       
      
  |
| 44 | 8, 9 | sqrtge0d 14159 |
. . . . . . . . . . 11
    
◻NN  
       
      
      |
| 45 | 11 | nn0ge0d 11354 |
. . . . . . . . . . 11
    
◻NN  
       
      
  |
| 46 | 10, 12, 44, 45 | mulge0d 10604 |
. . . . . . . . . 10
    
◻NN  
       
      
        |
| 47 | 4, 13 | addge01d 10615 |
. . . . . . . . . 10
    
◻NN  
       
      
                  |
| 48 | 46, 47 | mpbid 222 |
. . . . . . . . 9
    
◻NN  
       
      
          |
| 49 | 2, 4, 14, 43, 48 | letrd 10194 |
. . . . . . . 8
    
◻NN  
       
      
          |
| 50 | 49 | adantrl 752 |
. . . . . . 7
    
◻NN  
                        
          |
| 51 | | simprl 794 |
. . . . . . 7
    
◻NN  
                        
          |
| 52 | 50, 51 | breqtrrd 4681 |
. . . . . 6
    
◻NN  
                        
  |
| 53 | 52 | ex 450 |
. . . . 5
   
◻NN  
                            |
| 54 | 53 | rexlimdvva 3038 |
. . . 4
   ◻NN                              |
| 55 | 54 | expimpd 629 |
. . 3
  ◻NN                           
   |
| 56 | 1, 55 | sylbid 230 |
. 2
  ◻NN  Pell1QR     |
| 57 | 56 | imp 445 |
1
   ◻NN Pell1QR  
  |