Proof of Theorem sqrlem11
| Step | Hyp | Ref
| Expression |
| 1 | | sqrlem9.3 |
. . . . . . . . . . . 12
 |
| 2 | 1, 1 | remulcl 4119 |
. . . . . . . . . . 11

  |
| 3 | 2 | recn 4098 |
. . . . . . . . . 10

  |
| 4 | | 1cn 4101 |
. . . . . . . . . . . 12
 |
| 5 | 4, 4 | addcl 4104 |
. . . . . . . . . . 11
   |
| 6 | 5 | negcl 4142 |
. . . . . . . . . 10
    |
| 7 | | sqrlem1.1 |
. . . . . . . . . . . 12
 |
| 8 | 7 | renegcl 4171 |
. . . . . . . . . . 11
  |
| 9 | 8 | recn 4098 |
. . . . . . . . . 10
  |
| 10 | 3, 6, 9 | mul12 4178 |
. . . . . . . . 9
  
             
    |
| 11 | 2, 8 | remulcl 4119 |
. . . . . . . . . . 11
  
   |
| 12 | 11 | recn 4098 |
. . . . . . . . . 10
  
   |
| 13 | 5, 12 | mulneg1 4190 |
. . . . . . . . 9
      
              |
| 14 | 12 | 1p1times 4187 |
. . . . . . . . . . 11
            
         |
| 15 | 14 | negeqi 4137 |
. . . . . . . . . 10
                   
    |
| 16 | | df-neg 4135 |
. . . . . . . . . 10
         
                  |
| 17 | 15, 16 | eqtr 1119 |
. . . . . . . . 9
                         |
| 18 | 10, 13, 17 | 3eqtr 1123 |
. . . . . . . 8
  
           
          |
| 19 | 2, 8 | readdcl 4118 |
. . . . . . . . . . 11
  
   |
| 20 | 7 | recn 4098 |
. . . . . . . . . . . . 13
 |
| 21 | 20 | negid 4147 |
. . . . . . . . . . . 12

   |
| 22 | | sqrlem9.6 |
. . . . . . . . . . . . 13
   |
| 23 | 7, 2, 8 | ltadd1 4313 |
. . . . . . . . . . . . 13

            |
| 24 | 22, 23 | mpbi 164 |
. . . . . . . . . . . 12

        |
| 25 | 21, 24 | eqbrtrr 2078 |
. . . . . . . . . . 11
      |
| 26 | 19, 19, 25, 25 | mulgt0i 4336 |
. . . . . . . . . 10
             |
| 27 | 3, 9, 3, 9 | muladd 4181 |
. . . . . . . . . 10
        
            
      
          |
| 28 | 26, 27 | breqtr 2080 |
. . . . . . . . 9
                           |
| 29 | | ax0re 4063 |
. . . . . . . . . 10
 |
| 30 | 11, 11 | readdcl 4118 |
. . . . . . . . . 10
        
    |
| 31 | 2, 2 | remulcl 4119 |
. . . . . . . . . . 11
  
    |
| 32 | 8, 8 | remulcl 4119 |
. . . . . . . . . . 11
 
 
 |
| 33 | 31, 32 | readdcl 4118 |
. . . . . . . . . 10
        
    |
| 34 | 29, 30, 33 | ltsubadd 4316 |
. . . . . . . . 9
          
            
            
           
      |
| 35 | 28, 34 | mpbir 165 |
. . . . . . . 8
    
            
         |
| 36 | 18, 35 | eqbrtr 2076 |
. . . . . . 7
  
               
    |
| 37 | | ax1re 4064 |
. . . . . . . . . . . 12
 |
| 38 | 37, 37 | readdcl 4118 |
. . . . . . . . . . 11
   |
| 39 | 38 | renegcl 4171 |
. . . . . . . . . 10
    |
| 40 | 39, 8 | remulcl 4119 |
. . . . . . . . 9
       |
| 41 | 2, 40 | remulcl 4119 |
. . . . . . . 8
  
        |
| 42 | | sqrlem9.5 |
. . . . . . . . 9
 |
| 43 | 1, 1, 42, 42 | mulgt0i 4336 |
. . . . . . . 8
   |
| 44 | 41, 33, 2, 43 | ltdivi 4398 |
. . . . . . 7
                   
      
       
           
        |
| 45 | 36, 44 | mpbi 164 |
. . . . . 6
                       
   
   |
| 46 | 6, 9 | mulcl 4105 |
. . . . . . . 8
       |
| 47 | 1 | recn 4098 |
. . . . . . . . 9
 |
| 48 | 1, 42 | gt0ne0i 4345 |
. . . . . . . . 9
 |
| 49 | 47, 47, 48, 48 | muln0 4214 |
. . . . . . . 8

  |
| 50 | 3, 46, 49 | divcan3 4247 |
. . . . . . 7
                     |
| 51 | 5, 20 | mul2neg 4192 |
. . . . . . 7
           |
| 52 | 50, 51 | eqtr 1119 |
. . . . . 6
                   |
| 53 | 31 | recn 4098 |
. . . . . . 7
  
    |
| 54 | 32 | recn 4098 |
. . . . . . 7
 
 
 |
| 55 | 2, 43 | gt0ne0i 4345 |
. . . . . . 7

  |
| 56 | 53, 54, 3, 55 | divdistr 4243 |
. . . . . 6
         
   
               
       |
| 57 | 45, 52, 56 | 3brtr3 2084 |
. . . . 5
        
                |
| 58 | 38, 7 | remulcl 4119 |
. . . . . 6
     |
| 59 | 31, 2, 55 | redivcl 4274 |
. . . . . . 7
           |
| 60 | 32, 2, 55 | redivcl 4274 |
. . . . . . 7
         |
| 61 | 59, 60 | readdcl 4118 |
. . . . . 6
        
    
 
     |
| 62 | 58, 61, 58 | ltadd1 4313 |
. . . . 5
    
             
                         
    
 
           |
| 63 | 57, 62 | mpbi 164 |
. . . 4
    
                   
            |
| 64 | 5, 5 | mulcl 4105 |
. . . . . 6
       |
| 65 | 20, 64 | mulcom 4107 |
. . . . 5

                |
| 66 | 5, 5, 20 | mulass 4109 |
. . . . 5
                 |
| 67 | 5, 20 | mulcl 4105 |
. . . . . 6
     |
| 68 | 67 | 1p1times 4187 |
. . . . 5
                   |
| 69 | 65, 66, 68 | 3eqtr 1123 |
. . . 4

                  |
| 70 | 20, 47, 48 | divcl 4221 |
. . . . . 6

  |
| 71 | 47, 70, 47, 70 | muladd 4181 |
. . . . 5
                         |