Proof of Theorem atanlogaddlem
| Step | Hyp | Ref
| Expression |
| 1 | | 0re 10040 |
. . . 4
 |
| 2 | | atandm2 24604 |
. . . . . 6

arctan             |
| 3 | 2 | simp1bi 1076 |
. . . . 5

arctan   |
| 4 | 3 | recld 13934 |
. . . 4

arctan       |
| 5 | | leloe 10124 |
. . . 4
                         |
| 6 | 1, 4, 5 | sylancr 695 |
. . 3

arctan     
             |
| 7 | 6 | biimpa 501 |
. 2
  arctan      
           |
| 8 | | ax-1cn 9994 |
. . . . . . . 8
 |
| 9 | | ax-icn 9995 |
. . . . . . . . 9
 |
| 10 | | mulcl 10020 |
. . . . . . . . 9
 
     |
| 11 | 9, 3, 10 | sylancr 695 |
. . . . . . . 8

arctan     |
| 12 | | addcl 10018 |
. . . . . . . 8
  
        |
| 13 | 8, 11, 12 | sylancr 695 |
. . . . . . 7

arctan       |
| 14 | 2 | simp3bi 1078 |
. . . . . . 7

arctan       |
| 15 | 13, 14 | logcld 24317 |
. . . . . 6

arctan           |
| 16 | | subcl 10280 |
. . . . . . . 8
  
        |
| 17 | 8, 11, 16 | sylancr 695 |
. . . . . . 7

arctan       |
| 18 | 2 | simp2bi 1077 |
. . . . . . 7

arctan       |
| 19 | 17, 18 | logcld 24317 |
. . . . . 6

arctan     
     |
| 20 | 15, 19 | addcld 10059 |
. . . . 5

arctan                     |
| 21 | 20 | adantr 481 |
. . . 4
  arctan                   
      |
| 22 | | pire 24210 |
. . . . . . . 8
 |
| 23 | 22 | renegcli 10342 |
. . . . . . 7
  |
| 24 | 23 | a1i 11 |
. . . . . 6
  arctan         |
| 25 | 19 | adantr 481 |
. . . . . . 7
  arctan                |
| 26 | 25 | imcld 13935 |
. . . . . 6
  arctan             
      |
| 27 | 15 | adantr 481 |
. . . . . . . 8
  arctan                |
| 28 | 27 | imcld 13935 |
. . . . . . 7
  arctan                    |
| 29 | 28, 26 | readdcld 10069 |
. . . . . 6
  arctan                                  |
| 30 | 17 | adantr 481 |
. . . . . . . . 9
  arctan            |
| 31 | | im1 13895 |
. . . . . . . . . . . . 13
     |
| 32 | 31 | oveq1i 6660 |
. . . . . . . . . . . 12
        
            |
| 33 | | df-neg 10269 |
. . . . . . . . . . . 12
                |
| 34 | 32, 33 | eqtr4i 2647 |
. . . . . . . . . . 11
        
       
   |
| 35 | 11 | adantr 481 |
. . . . . . . . . . . 12
  arctan      
   |
| 36 | | imsub 13875 |
. . . . . . . . . . . 12
  
      
                 |
| 37 | 8, 35, 36 | sylancr 695 |
. . . . . . . . . . 11
  arctan                            |
| 38 | 3 | adantr 481 |
. . . . . . . . . . . . 13
  arctan        |
| 39 | | reim 13849 |
. . . . . . . . . . . . 13
        
    |
| 40 | 38, 39 | syl 17 |
. . . . . . . . . . . 12
  arctan             
    |
| 41 | 40 | negeqd 10275 |
. . . . . . . . . . 11
  arctan               
    |
| 42 | 34, 37, 41 | 3eqtr4a 2682 |
. . . . . . . . . 10
  arctan                     |
| 43 | 4 | lt0neg2d 10598 |
. . . . . . . . . . 11

arctan     
        |
| 44 | 43 | biimpa 501 |
. . . . . . . . . 10
  arctan             |
| 45 | 42, 44 | eqbrtrd 4675 |
. . . . . . . . 9
  arctan                |
| 46 | | argimlt0 24359 |
. . . . . . . . 9
   
                              |
| 47 | 30, 45, 46 | syl2anc 693 |
. . . . . . . 8
  arctan             
           |
| 48 | | eliooord 12233 |
. . . . . . . 8
        
                              
       |
| 49 | 47, 48 | syl 17 |
. . . . . . 7
  arctan                           
       |
| 50 | 49 | simpld 475 |
. . . . . 6
  arctan                     |
| 51 | 13 | adantr 481 |
. . . . . . . . . 10
  arctan            |
| 52 | | simpr 477 |
. . . . . . . . . . 11
  arctan            |
| 53 | | imadd 13874 |
. . . . . . . . . . . . 13
  
                        |
| 54 | 8, 35, 53 | sylancr 695 |
. . . . . . . . . . . 12
  arctan                      
     |
| 55 | 40 | oveq2d 6666 |
. . . . . . . . . . . 12
  arctan                        
     |
| 56 | 31 | oveq1i 6660 |
. . . . . . . . . . . . 13
                 |
| 57 | 38 | recld 13934 |
. . . . . . . . . . . . . . 15
  arctan            |
| 58 | 57 | recnd 10068 |
. . . . . . . . . . . . . 14
  arctan            |
| 59 | 58 | addid2d 10237 |
. . . . . . . . . . . . 13
  arctan                  |
| 60 | 56, 59 | syl5eq 2668 |
. . . . . . . . . . . 12
  arctan                      |
| 61 | 54, 55, 60 | 3eqtr2d 2662 |
. . . . . . . . . . 11
  arctan                    |
| 62 | 52, 61 | breqtrrd 4681 |
. . . . . . . . . 10
  arctan                |
| 63 | | argimgt0 24358 |
. . . . . . . . . 10
                                 |
| 64 | 51, 62, 63 | syl2anc 693 |
. . . . . . . . 9
  arctan                        |
| 65 | | eliooord 12233 |
. . . . . . . . 9
                                             |
| 66 | 64, 65 | syl 17 |
. . . . . . . 8
  arctan      
                           |
| 67 | 66 | simpld 475 |
. . . . . . 7
  arctan                    |
| 68 | 28, 26 | ltaddpos2d 10612 |
. . . . . . 7
  arctan      
           
                                         |
| 69 | 67, 68 | mpbid 222 |
. . . . . 6
  arctan             
                                |
| 70 | 24, 26, 29, 50, 69 | lttrd 10198 |
. . . . 5
  arctan                                   |
| 71 | 27, 25 | imaddd 13955 |
. . . . 5
  arctan                                                        |
| 72 | 70, 71 | breqtrrd 4681 |
. . . 4
  arctan                       
       |
| 73 | 22 | a1i 11 |
. . . . . 6
  arctan        |
| 74 | | 0red 10041 |
. . . . . . . . 9
  arctan        |
| 75 | 49 | simprd 479 |
. . . . . . . . 9
  arctan             
      |
| 76 | 26, 74, 28, 75 | ltadd2dd 10196 |
. . . . . . . 8
  arctan                                                |
| 77 | 28 | recnd 10068 |
. . . . . . . . 9
  arctan                    |
| 78 | 77 | addid1d 10236 |
. . . . . . . 8
  arctan                                  |
| 79 | 76, 78 | breqtrd 4679 |
. . . . . . 7
  arctan                                              |
| 80 | 66 | simprd 479 |
. . . . . . 7
  arctan                    |
| 81 | 29, 28, 73, 79, 80 | lttrd 10198 |
. . . . . 6
  arctan                                  |
| 82 | 29, 73, 81 | ltled 10185 |
. . . . 5
  arctan                                  |
| 83 | 71, 82 | eqbrtrd 4675 |
. . . 4
  arctan                              |
| 84 | | ellogrn 24306 |
. . . 4
              
                       
                                               |
| 85 | 21, 72, 83, 84 | syl3anbrc 1246 |
. . 3
  arctan                   
      |
| 86 | | 0red 10041 |
. . . 4
  arctan        |
| 87 | 11 | adantr 481 |
. . . . 5
  arctan          |
| 88 | | simpr 477 |
. . . . . 6
  arctan            |
| 89 | 3 | adantr 481 |
. . . . . . 7
  arctan     
  |
| 90 | 89, 39 | syl 17 |
. . . . . 6
  arctan                  |
| 91 | 88, 90 | eqtr2d 2657 |
. . . . 5
  arctan         
    |
| 92 | 87, 91 | reim0bd 13940 |
. . . 4
  arctan          |
| 93 | 15, 19 | addcomd 10238 |
. . . . . 6

arctan                                       |
| 94 | 93 | ad2antrr 762 |
. . . . 5
   arctan      
 
                                      |
| 95 | | logrncl 24314 |
. . . . . . . 8
   
   
             |
| 96 | 17, 18, 95 | syl2anc 693 |
. . . . . . 7

arctan     
     |
| 97 | 96 | ad2antrr 762 |
. . . . . 6
   arctan      
 
    
     |
| 98 | | 1re 10039 |
. . . . . . . . 9
 |
| 99 | 92 | adantr 481 |
. . . . . . . . 9
   arctan      
 
    |
| 100 | | readdcl 10019 |
. . . . . . . . 9
  
        |
| 101 | 98, 99, 100 | sylancr 695 |
. . . . . . . 8
   arctan      
 
      |
| 102 | | 0red 10041 |
. . . . . . . . 9
   arctan      
 
  |
| 103 | | 1red 10055 |
. . . . . . . . 9
   arctan      
 
  |
| 104 | | 0lt1 10550 |
. . . . . . . . . 10
 |
| 105 | 104 | a1i 11 |
. . . . . . . . 9
   arctan      
 
  |
| 106 | | addge01 10538 |
. . . . . . . . . . 11
  
            |
| 107 | 98, 92, 106 | sylancr 695 |
. . . . . . . . . 10
  arctan       
        |
| 108 | 107 | biimpa 501 |
. . . . . . . . 9
   arctan      
 
      |
| 109 | 102, 103,
101, 105, 108 | ltletrd 10197 |
. . . . . . . 8
   arctan      
 
      |
| 110 | 101, 109 | elrpd 11869 |
. . . . . . 7
   arctan      
 
      |
| 111 | 110 | relogcld 24369 |
. . . . . 6
   arctan      
 
          |
| 112 | | logrnaddcl 24321 |
. . . . . 6
                        
              |
| 113 | 97, 111, 112 | syl2anc 693 |
. . . . 5
   arctan      
 
                    |
| 114 | 94, 113 | eqeltrd 2701 |
. . . 4
   arctan      
 
                    |
| 115 | | logrncl 24314 |
. . . . . . 7
                     |
| 116 | 13, 14, 115 | syl2anc 693 |
. . . . . 6

arctan           |
| 117 | 116 | ad2antrr 762 |
. . . . 5
   arctan        
          |
| 118 | 92 | adantr 481 |
. . . . . . . 8
   arctan        
    |
| 119 | | resubcl 10345 |
. . . . . . . 8
  
        |
| 120 | 98, 118, 119 | sylancr 695 |
. . . . . . 7
   arctan        
      |
| 121 | | 0red 10041 |
. . . . . . . 8
   arctan        
  |
| 122 | | 1red 10055 |
. . . . . . . 8
   arctan        
  |
| 123 | 104 | a1i 11 |
. . . . . . . 8
   arctan        
  |
| 124 | | 1m0e1 11131 |
. . . . . . . . 9
   |
| 125 | | 1red 10055 |
. . . . . . . . . . 11
  arctan        |
| 126 | 92, 86, 125 | lesub2d 10635 |
. . . . . . . . . 10
  arctan                  |
| 127 | 126 | biimpa 501 |
. . . . . . . . 9
   arctan        
   
    |
| 128 | 124, 127 | syl5eqbrr 4689 |
. . . . . . . 8
   arctan        
      |
| 129 | 121, 122,
120, 123, 128 | ltletrd 10197 |
. . . . . . 7
   arctan        
      |
| 130 | 120, 129 | elrpd 11869 |
. . . . . 6
   arctan        
      |
| 131 | 130 | relogcld 24369 |
. . . . 5
   arctan        
    
     |
| 132 | | logrnaddcl 24321 |
. . . . 5
                                       |
| 133 | 117, 131,
132 | syl2anc 693 |
. . . 4
   arctan        
                    |
| 134 | 86, 92, 114, 133 | lecasei 10143 |
. . 3
  arctan                   
      |
| 135 | 85, 134 | jaodan 826 |
. 2
  arctan 
                              |
| 136 | 7, 135 | syldan 487 |
1
  arctan                   
      |