| Step | Hyp | Ref
| Expression |
| 1 | | uzp1 11721 |
. 2
    

         |
| 2 | | efgredlemb.8 |
. . . . . 6
           |
| 3 | | efgval.w |
. . . . . . . . . . 11
Word     |
| 4 | | fviss 6256 |
. . . . . . . . . . 11
Word    Word    |
| 5 | 3, 4 | eqsstri 3635 |
. . . . . . . . . 10
Word    |
| 6 | | efgredlem.2 |
. . . . . . . . . . . . 13
   |
| 7 | | efgval.r |
. . . . . . . . . . . . . . 15
~FG    |
| 8 | | efgval2.m |
. . . . . . . . . . . . . . 15
 
       |
| 9 | | efgval2.t |
. . . . . . . . . . . . . . 15
              splice                  |
| 10 | | efgred.d |
. . . . . . . . . . . . . . 15
 
      |
| 11 | | efgred.s |
. . . . . . . . . . . . . . 15
  Word           ..^                                  |
| 12 | 3, 7, 8, 9, 10, 11 | efgsdm 18143 |
. . . . . . . . . . . . . 14

 Word       
  ..^                       |
| 13 | 12 | simp1bi 1076 |
. . . . . . . . . . . . 13

Word      |
| 14 | 6, 13 | syl 17 |
. . . . . . . . . . . 12
 Word      |
| 15 | | eldifi 3732 |
. . . . . . . . . . . 12
 Word   
Word   |
| 16 | | wrdf 13310 |
. . . . . . . . . . . 12
 Word    ..^         |
| 17 | 14, 15, 16 | 3syl 18 |
. . . . . . . . . . 11
    ..^         |
| 18 | | fzossfz 12488 |
. . . . . . . . . . . . 13
 ..^      
           |
| 19 | | efgredlemb.k |
. . . . . . . . . . . . . 14
         |
| 20 | | efgredlem.1 |
. . . . . . . . . . . . . . . . 17
             
       
                     |
| 21 | | efgredlem.3 |
. . . . . . . . . . . . . . . . 17
   |
| 22 | | efgredlem.4 |
. . . . . . . . . . . . . . . . 17
           |
| 23 | | efgredlem.5 |
. . . . . . . . . . . . . . . . 17
           |
| 24 | 3, 7, 8, 9, 10, 11, 20, 6, 21, 22, 23 | efgredlema 18153 |
. . . . . . . . . . . . . . . 16
                 |
| 25 | 24 | simpld 475 |
. . . . . . . . . . . . . . 15
         |
| 26 | | fzo0end 12560 |
. . . . . . . . . . . . . . 15
                ..^         |
| 27 | 25, 26 | syl 17 |
. . . . . . . . . . . . . 14
          ..^         |
| 28 | 19, 27 | syl5eqel 2705 |
. . . . . . . . . . . . 13
  ..^         |
| 29 | 18, 28 | sseldi 3601 |
. . . . . . . . . . . 12
             |
| 30 | | lencl 13324 |
. . . . . . . . . . . . . . 15
 Word       |
| 31 | 14, 15, 30 | 3syl 18 |
. . . . . . . . . . . . . 14
       |
| 32 | 31 | nn0zd 11480 |
. . . . . . . . . . . . 13
       |
| 33 | | fzoval 12471 |
. . . . . . . . . . . . 13
    
 ..^                 |
| 34 | 32, 33 | syl 17 |
. . . . . . . . . . . 12
  ..^                 |
| 35 | 29, 34 | eleqtrrd 2704 |
. . . . . . . . . . 11
  ..^       |
| 36 | 17, 35 | ffvelrnd 6360 |
. . . . . . . . . 10
       |
| 37 | 5, 36 | sseldi 3601 |
. . . . . . . . 9
     Word
    |
| 38 | | efgredlemb.p |
. . . . . . . . . 10
               |
| 39 | | elfzuz 12338 |
. . . . . . . . . 10
                   |
| 40 | | eluzfz1 12348 |
. . . . . . . . . 10
    
      |
| 41 | 38, 39, 40 | 3syl 18 |
. . . . . . . . 9
       |
| 42 | | lencl 13324 |
. . . . . . . . . . . 12
     Word  
          |
| 43 | 37, 42 | syl 17 |
. . . . . . . . . . 11
           |
| 44 | | nn0uz 11722 |
. . . . . . . . . . 11
     |
| 45 | 43, 44 | syl6eleq 2711 |
. . . . . . . . . 10
               |
| 46 | | eluzfz2 12349 |
. . . . . . . . . 10
                                   |
| 47 | 45, 46 | syl 17 |
. . . . . . . . 9
                       |
| 48 | | ccatswrd 13456 |
. . . . . . . . 9
      Word
      
                                       
substr     ++      substr                   substr               |
| 49 | 37, 41, 38, 47, 48 | syl13anc 1328 |
. . . . . . . 8
       substr  
  ++     
substr                   substr               |
| 50 | | swrdid 13428 |
. . . . . . . . 9
     Word  
     substr                   |
| 51 | 37, 50 | syl 17 |
. . . . . . . 8
     
substr                   |
| 52 | 49, 51 | eqtrd 2656 |
. . . . . . 7
       substr  
  ++     
substr                    |
| 53 | 3, 7, 8, 9, 10, 11 | efgsdm 18143 |
. . . . . . . . . . . . . 14

 Word       
  ..^                       |
| 54 | 53 | simp1bi 1076 |
. . . . . . . . . . . . 13

Word      |
| 55 | 21, 54 | syl 17 |
. . . . . . . . . . . 12
 Word      |
| 56 | | eldifi 3732 |
. . . . . . . . . . . 12
 Word   
Word   |
| 57 | | wrdf 13310 |
. . . . . . . . . . . 12
 Word    ..^         |
| 58 | 55, 56, 57 | 3syl 18 |
. . . . . . . . . . 11
    ..^         |
| 59 | | fzossfz 12488 |
. . . . . . . . . . . . 13
 ..^      
           |
| 60 | | efgredlemb.l |
. . . . . . . . . . . . . 14
         |
| 61 | 24 | simprd 479 |
. . . . . . . . . . . . . . 15
         |
| 62 | | fzo0end 12560 |
. . . . . . . . . . . . . . 15
                ..^         |
| 63 | 61, 62 | syl 17 |
. . . . . . . . . . . . . 14
          ..^         |
| 64 | 60, 63 | syl5eqel 2705 |
. . . . . . . . . . . . 13
  ..^         |
| 65 | 59, 64 | sseldi 3601 |
. . . . . . . . . . . 12
             |
| 66 | | lencl 13324 |
. . . . . . . . . . . . . . 15
 Word       |
| 67 | 55, 56, 66 | 3syl 18 |
. . . . . . . . . . . . . 14
       |
| 68 | 67 | nn0zd 11480 |
. . . . . . . . . . . . 13
       |
| 69 | | fzoval 12471 |
. . . . . . . . . . . . 13
    
 ..^                 |
| 70 | 68, 69 | syl 17 |
. . . . . . . . . . . 12
  ..^                 |
| 71 | 65, 70 | eleqtrrd 2704 |
. . . . . . . . . . 11
  ..^       |
| 72 | 58, 71 | ffvelrnd 6360 |
. . . . . . . . . 10
       |
| 73 | 5, 72 | sseldi 3601 |
. . . . . . . . 9
     Word
    |
| 74 | | efgredlemb.q |
. . . . . . . . . 10
               |
| 75 | | elfzuz 12338 |
. . . . . . . . . 10
                   |
| 76 | | eluzfz1 12348 |
. . . . . . . . . 10
    
      |
| 77 | 74, 75, 76 | 3syl 18 |
. . . . . . . . 9
       |
| 78 | | lencl 13324 |
. . . . . . . . . . . 12
     Word  
          |
| 79 | 73, 78 | syl 17 |
. . . . . . . . . . 11
           |
| 80 | 79, 44 | syl6eleq 2711 |
. . . . . . . . . 10
               |
| 81 | | eluzfz2 12349 |
. . . . . . . . . 10
                                   |
| 82 | 80, 81 | syl 17 |
. . . . . . . . 9
                       |
| 83 | | ccatswrd 13456 |
. . . . . . . . 9
      Word
      
                                       
substr     ++      substr                   substr               |
| 84 | 73, 77, 74, 82, 83 | syl13anc 1328 |
. . . . . . . 8
       substr  
  ++     
substr                   substr               |
| 85 | | swrdid 13428 |
. . . . . . . . 9
     Word  
     substr                   |
| 86 | 73, 85 | syl 17 |
. . . . . . . 8
     
substr                   |
| 87 | 84, 86 | eqtrd 2656 |
. . . . . . 7
       substr  
  ++     
substr                    |
| 88 | 52, 87 | eqeq12d 2637 |
. . . . . 6
        substr     ++     
substr                   
substr     ++      substr                         |
| 89 | 2, 88 | mtbird 315 |
. . . . 5
       substr     ++     
substr                   
substr     ++      substr                |
| 90 | | efgredlemb.6 |
. . . . . . . . . . . . 13
                   |
| 91 | | efgredlemb.u |
. . . . . . . . . . . . . 14
     |
| 92 | 3, 7, 8, 9 | efgtval 18136 |
. . . . . . . . . . . . . 14
     
                               
splice   
             |
| 93 | 36, 38, 91, 92 | syl3anc 1326 |
. . . . . . . . . . . . 13
                  splice                 |
| 94 | 8 | efgmf 18126 |
. . . . . . . . . . . . . . . . 17
         |
| 95 | 94 | ffvelrni 6358 |
. . . . . . . . . . . . . . . 16
  
        |
| 96 | 91, 95 | syl 17 |
. . . . . . . . . . . . . . 15
         |
| 97 | 91, 96 | s2cld 13616 |
. . . . . . . . . . . . . 14
          Word     |
| 98 | | splval 13502 |
. . . . . . . . . . . . . 14
      
                                 Word          splice                      substr     ++           ++      substr                |
| 99 | 36, 38, 38, 97, 98 | syl13anc 1328 |
. . . . . . . . . . . . 13
     
splice   
                  substr     ++           ++      substr                |
| 100 | 90, 93, 99 | 3eqtrd 2660 |
. . . . . . . . . . . 12
           
substr     ++           ++     
substr                |
| 101 | | efgredlemb.7 |
. . . . . . . . . . . . 13
                   |
| 102 | | efgredlemb.v |
. . . . . . . . . . . . . 14
     |
| 103 | 3, 7, 8, 9 | efgtval 18136 |
. . . . . . . . . . . . . 14
     
                               
splice   
             |
| 104 | 72, 74, 102, 103 | syl3anc 1326 |
. . . . . . . . . . . . 13
                  splice                 |
| 105 | 94 | ffvelrni 6358 |
. . . . . . . . . . . . . . . 16
  
        |
| 106 | 102, 105 | syl 17 |
. . . . . . . . . . . . . . 15
         |
| 107 | 102, 106 | s2cld 13616 |
. . . . . . . . . . . . . 14
          Word     |
| 108 | | splval 13502 |
. . . . . . . . . . . . . 14
      
                                 Word          splice                      substr     ++           ++      substr                |
| 109 | 72, 74, 74, 107, 108 | syl13anc 1328 |
. . . . . . . . . . . . 13
     
splice   
                  substr     ++           ++      substr                |
| 110 | 101, 104,
109 | 3eqtrd 2660 |
. . . . . . . . . . . 12
           
substr     ++           ++     
substr                |
| 111 | 22, 100, 110 | 3eqtr3d 2664 |
. . . . . . . . . . 11
        substr     ++           ++      substr                    
substr     ++           ++     
substr                |
| 112 | 111 | adantr 481 |
. . . . . . . . . 10
 
        substr  
  ++           ++      substr                    
substr     ++           ++     
substr                |
| 113 | | swrdcl 13419 |
. . . . . . . . . . . . . 14
     Word  
     substr     Word     |
| 114 | 37, 113 | syl 17 |
. . . . . . . . . . . . 13
     
substr     Word     |
| 115 | 114 | adantr 481 |
. . . . . . . . . . . 12
 
      substr     Word     |
| 116 | 97 | adantr 481 |
. . . . . . . . . . . 12
 
          Word     |
| 117 | | ccatcl 13359 |
. . . . . . . . . . . 12
      
substr     Word            Word   
      substr     ++           Word     |
| 118 | 115, 116,
117 | syl2anc 693 |
. . . . . . . . . . 11
 
      
substr     ++           Word     |
| 119 | | swrdcl 13419 |
. . . . . . . . . . . . 13
     Word  
     substr             Word     |
| 120 | 37, 119 | syl 17 |
. . . . . . . . . . . 12
     
substr            
Word     |
| 121 | 120 | adantr 481 |
. . . . . . . . . . 11
 
      substr             Word
    |
| 122 | | swrdcl 13419 |
. . . . . . . . . . . . . 14
     Word  
     substr     Word     |
| 123 | 73, 122 | syl 17 |
. . . . . . . . . . . . 13
     
substr     Word     |
| 124 | 123 | adantr 481 |
. . . . . . . . . . . 12
 
      substr     Word     |
| 125 | 107 | adantr 481 |
. . . . . . . . . . . 12
 
          Word     |
| 126 | | ccatcl 13359 |
. . . . . . . . . . . 12
      
substr     Word            Word   
      substr     ++           Word     |
| 127 | 124, 125,
126 | syl2anc 693 |
. . . . . . . . . . 11
 
      
substr     ++           Word     |
| 128 | | swrdcl 13419 |
. . . . . . . . . . . . 13
     Word  
     substr             Word     |
| 129 | 73, 128 | syl 17 |
. . . . . . . . . . . 12
     
substr            
Word     |
| 130 | 129 | adantr 481 |
. . . . . . . . . . 11
 
      substr             Word
    |
| 131 | | swrd0len 13422 |
. . . . . . . . . . . . . . . 16
      Word
              
        substr        |
| 132 | 37, 38, 131 | syl2anc 693 |
. . . . . . . . . . . . . . 15
         substr        |
| 133 | | swrd0len 13422 |
. . . . . . . . . . . . . . . 16
      Word
              
        substr        |
| 134 | 73, 74, 133 | syl2anc 693 |
. . . . . . . . . . . . . . 15
         substr        |
| 135 | 132, 134 | eqeq12d 2637 |
. . . . . . . . . . . . . 14
          substr              substr     
   |
| 136 | 135 | biimpar 502 |
. . . . . . . . . . . . 13
 
         substr  
          
substr        |
| 137 | | s2len 13634 |
. . . . . . . . . . . . . . 15
              |
| 138 | | s2len 13634 |
. . . . . . . . . . . . . . 15
              |
| 139 | 137, 138 | eqtr4i 2647 |
. . . . . . . . . . . . . 14
                           |
| 140 | 139 | a1i 11 |
. . . . . . . . . . . . 13
 
                             |
| 141 | 136, 140 | oveq12d 6668 |
. . . . . . . . . . . 12
 
          substr                            
substr                      |
| 142 | | ccatlen 13360 |
. . . . . . . . . . . . 13
      
substr     Word            Word   
        
substr     ++                     substr                      |
| 143 | 115, 116,
142 | syl2anc 693 |
. . . . . . . . . . . 12
 
          substr     ++                     substr                      |
| 144 | | ccatlen 13360 |
. . . . . . . . . . . . 13
      
substr     Word            Word   
        
substr     ++                     substr                      |
| 145 | 124, 125,
144 | syl2anc 693 |
. . . . . . . . . . . 12
 
          substr     ++                     substr                      |
| 146 | 141, 143,
145 | 3eqtr4d 2666 |
. . . . . . . . . . 11
 
          substr     ++                    
substr     ++              |
| 147 | | ccatopth 13470 |
. . . . . . . . . . 11
         substr     ++           Word        substr             Word          
substr     ++           Word        substr             Word             substr  
  ++                    
substr     ++                     substr     ++           ++      substr                    
substr     ++           ++     
substr             
      
substr     ++                 substr     ++                substr                  substr                 |
| 148 | 118, 121,
127, 130, 146, 147 | syl221anc 1337 |
. . . . . . . . . 10
 
         substr     ++           ++      substr                    
substr     ++           ++     
substr             
      
substr     ++                 substr     ++                substr                  substr                 |
| 149 | 112, 148 | mpbid 222 |
. . . . . . . . 9
 
        substr  
  ++                
substr     ++               
substr            
     substr                |
| 150 | 149 | simpld 475 |
. . . . . . . 8
 
      
substr     ++                 substr     ++             |
| 151 | | ccatopth 13470 |
. . . . . . . . 9
        substr  
  Word  
         Word          substr     Word            Word
           substr             
substr              substr     ++                 substr  
  ++          
      substr          substr                           |
| 152 | 115, 116,
124, 125, 136, 151 | syl221anc 1337 |
. . . . . . . 8
 
        substr  
  ++                
substr     ++                
substr          substr                           |
| 153 | 150, 152 | mpbid 222 |
. . . . . . 7
 
      
substr          substr                          |
| 154 | 153 | simpld 475 |
. . . . . 6
 
      substr          substr       |
| 155 | 149 | simprd 479 |
. . . . . 6
 
      substr                  substr               |
| 156 | 154, 155 | oveq12d 6668 |
. . . . 5
 
      
substr     ++      substr                    substr     ++      substr                |
| 157 | 89, 156 | mtand 691 |
. . . 4
   |
| 158 | 157 | pm2.21d 118 |
. . 3
             |
| 159 | | uzp1 11721 |
. . . 4
    
 
       
      |
| 160 | 91 | s1cld 13383 |
. . . . . . . . . . . . . . . . 17
     Word     |
| 161 | | ccatcl 13359 |
. . . . . . . . . . . . . . . . 17
      
substr     Word       Word         
substr     ++      Word     |
| 162 | 114, 160,
161 | syl2anc 693 |
. . . . . . . . . . . . . . . 16
       substr  
  ++     
Word     |
| 163 | 96 | s1cld 13383 |
. . . . . . . . . . . . . . . 16
         Word
    |
| 164 | | ccatass 13371 |
. . . . . . . . . . . . . . . 16
        substr  
  ++     
Word           Word        substr             Word   
        substr  
  ++      ++          ++      substr                    
substr     ++      ++          ++      substr                 |
| 165 | 162, 163,
120, 164 | syl3anc 1326 |
. . . . . . . . . . . . . . 15
         substr     ++     
++          ++      substr                    
substr     ++      ++          ++      substr                 |
| 166 | | ccatass 13371 |
. . . . . . . . . . . . . . . . . . 19
      
substr     Word       Word  
        Word
          substr     ++      ++               
substr     ++      ++             |
| 167 | 114, 160,
163, 166 | syl3anc 1326 |
. . . . . . . . . . . . . . . . . 18
        substr     ++      ++               
substr     ++      ++             |
| 168 | | df-s2 13593 |
. . . . . . . . . . . . . . . . . . 19
              ++           |
| 169 | 168 | oveq2i 6661 |
. . . . . . . . . . . . . . . . . 18
      substr     ++                 substr  
  ++      ++            |
| 170 | 167, 169 | syl6eqr 2674 |
. . . . . . . . . . . . . . . . 17
        substr     ++      ++               
substr     ++             |
| 171 | 170 | oveq1d 6665 |
. . . . . . . . . . . . . . . 16
         substr     ++     
++          ++      substr                    
substr     ++           ++     
substr                |
| 172 | 102 | s1cld 13383 |
. . . . . . . . . . . . . . . . . . 19
     Word     |
| 173 | 106 | s1cld 13383 |
. . . . . . . . . . . . . . . . . . 19
         Word
    |
| 174 | | ccatass 13371 |
. . . . . . . . . . . . . . . . . . 19
      
substr     Word       Word  
        Word
          substr     ++      ++               
substr     ++      ++             |
| 175 | 123, 172,
173, 174 | syl3anc 1326 |
. . . . . . . . . . . . . . . . . 18
        substr     ++      ++               
substr     ++      ++             |
| 176 | | df-s2 13593 |
. . . . . . . . . . . . . . . . . . 19
              ++           |
| 177 | 176 | oveq2i 6661 |
. . . . . . . . . . . . . . . . . 18
      substr     ++                 substr  
  ++      ++            |
| 178 | 175, 177 | syl6eqr 2674 |
. . . . . . . . . . . . . . . . 17
        substr     ++      ++               
substr     ++             |
| 179 | 178 | oveq1d 6665 |
. . . . . . . . . . . . . . . 16
         substr     ++     
++          ++      substr                    
substr     ++           ++     
substr                |
| 180 | 111, 171,
179 | 3eqtr4d 2666 |
. . . . . . . . . . . . . . 15
         substr     ++     
++          ++      substr                      substr  
  ++      ++          ++      substr                |
| 181 | 165, 180 | eqtr3d 2658 |
. . . . . . . . . . . . . 14
        substr     ++      ++          ++      substr                      
substr     ++      ++          ++      substr                |
| 182 | 181 | adantr 481 |
. . . . . . . . . . . . 13
 

         substr  
  ++      ++          ++      substr                      
substr     ++      ++          ++      substr                |
| 183 | 162 | adantr 481 |
. . . . . . . . . . . . . 14
 

       
substr     ++      Word     |
| 184 | 163 | adantr 481 |
. . . . . . . . . . . . . . 15
 

          Word
    |
| 185 | 120 | adantr 481 |
. . . . . . . . . . . . . . 15
 

       substr             Word
    |
| 186 | | ccatcl 13359 |
. . . . . . . . . . . . . . 15
          Word        substr             Word   
         ++      substr              Word
    |
| 187 | 184, 185,
186 | syl2anc 693 |
. . . . . . . . . . . . . 14
 

           ++      substr              Word     |
| 188 | | ccatcl 13359 |
. . . . . . . . . . . . . . . . 17
      
substr     Word       Word         
substr     ++      Word     |
| 189 | 123, 172,
188 | syl2anc 693 |
. . . . . . . . . . . . . . . 16
       substr  
  ++     
Word     |
| 190 | 189 | adantr 481 |
. . . . . . . . . . . . . . 15
 

       
substr     ++      Word     |
| 191 | 173 | adantr 481 |
. . . . . . . . . . . . . . 15
 

          Word
    |
| 192 | | ccatcl 13359 |
. . . . . . . . . . . . . . 15
        substr  
  ++     
Word           Word   
      
substr     ++      ++          Word     |
| 193 | 190, 191,
192 | syl2anc 693 |
. . . . . . . . . . . . . 14
 

         substr  
  ++      ++          Word     |
| 194 | 129 | adantr 481 |
. . . . . . . . . . . . . 14
 

       substr             Word
    |
| 195 | | ccatlen 13360 |
. . . . . . . . . . . . . . . . . . . 20
      
substr     Word       Word             substr     ++                substr                 |
| 196 | 123, 172,
195 | syl2anc 693 |
. . . . . . . . . . . . . . . . . . 19
         
substr     ++                substr                 |
| 197 | | s1len 13385 |
. . . . . . . . . . . . . . . . . . . . 21
       
 |
| 198 | 197 | a1i 11 |
. . . . . . . . . . . . . . . . . . . 20
           |
| 199 | 134, 198 | oveq12d 6668 |
. . . . . . . . . . . . . . . . . . 19
          substr                   |
| 200 | 196, 199 | eqtrd 2656 |
. . . . . . . . . . . . . . . . . 18
         
substr     ++           |
| 201 | 132, 200 | eqeq12d 2637 |
. . . . . . . . . . . . . . . . 17
          substr               substr     ++      

    |
| 202 | 201 | biimpar 502 |
. . . . . . . . . . . . . . . 16
 

          substr  
            substr  
  ++         |
| 203 | | s1len 13385 |
. . . . . . . . . . . . . . . . . 18
       
 |
| 204 | | s1len 13385 |
. . . . . . . . . . . . . . . . . 18
             |
| 205 | 203, 204 | eqtr4i 2647 |
. . . . . . . . . . . . . . . . 17
       
             |
| 206 | 205 | a1i 11 |
. . . . . . . . . . . . . . . 16
 

         
              |
| 207 | 202, 206 | oveq12d 6668 |
. . . . . . . . . . . . . . 15
 

           substr                        
substr     ++                      |
| 208 | 114 | adantr 481 |
. . . . . . . . . . . . . . . 16
 

       substr     Word     |
| 209 | 160 | adantr 481 |
. . . . . . . . . . . . . . . 16
 

      Word
    |
| 210 | | ccatlen 13360 |
. . . . . . . . . . . . . . . 16
      
substr     Word       Word             substr     ++                substr                 |
| 211 | 208, 209,
210 | syl2anc 693 |
. . . . . . . . . . . . . . 15
 

           substr     ++                substr                 |
| 212 | | ccatlen 13360 |
. . . . . . . . . . . . . . . 16
        substr  
  ++     
Word           Word   
          substr  
  ++      ++                    
substr     ++                      |
| 213 | 190, 191,
212 | syl2anc 693 |
. . . . . . . . . . . . . . 15
 

            substr     ++     
++                    
substr     ++                      |
| 214 | 207, 211,
213 | 3eqtr4d 2666 |
. . . . . . . . . . . . . 14
 

           substr     ++                
substr     ++      ++             |
| 215 | | ccatopth 13470 |
. . . . . . . . . . . . . 14
         substr     ++     
Word            ++      substr              Word            substr  
  ++      ++          Word        substr             Word             substr  
  ++                
substr     ++      ++                   
substr     ++      ++          ++      substr                       substr     ++     
++          ++      substr                     substr     ++     
       substr  
  ++      ++                   ++      substr                   substr                 |
| 216 | 183, 187,
193, 194, 214, 215 | syl221anc 1337 |
. . . . . . . . . . . . 13
 

          substr     ++      ++          ++      substr                      
substr     ++      ++          ++      substr                     substr     ++     
       substr  
  ++      ++                   ++      substr                   substr                 |
| 217 | 182, 216 | mpbid 222 |
. . . . . . . . . . . 12
 

         substr  
  ++     
      
substr     ++      ++                   ++      substr                   substr                |
| 218 | 217 | simpld 475 |
. . . . . . . . . . 11
 

       
substr     ++             substr  
  ++      ++            |
| 219 | | ccatopth 13470 |
. . . . . . . . . . . 12
        substr  
  Word  
    Word
          substr     ++     
Word           Word           
substr              
substr     ++               substr     ++     
       substr  
  ++      ++         
      substr           substr     ++     
                |
| 220 | 208, 209,
190, 191, 202, 219 | syl221anc 1337 |
. . . . . . . . . . 11
 

         substr  
  ++     
      
substr     ++      ++         
      substr           substr     ++     
                |
| 221 | 218, 220 | mpbid 222 |
. . . . . . . . . 10
 

       
substr          
substr     ++                     |
| 222 | 221 | simpld 475 |
. . . . . . . . 9
 

       substr           substr     ++        |
| 223 | 222 | oveq1d 6665 |
. . . . . . . 8
 

       
substr     ++      substr                    
substr     ++      ++      substr                |
| 224 | 123 | adantr 481 |
. . . . . . . . 9
 

       substr     Word     |
| 225 | 172 | adantr 481 |
. . . . . . . . 9
 

      Word
    |
| 226 | | ccatass 13371 |
. . . . . . . . 9
      
substr     Word       Word  
     substr             Word
          substr     ++      ++     
substr                   
substr     ++      ++      substr                 |
| 227 | 224, 225,
185, 226 | syl3anc 1326 |
. . . . . . . 8
 

         substr  
  ++      ++     
substr                   
substr     ++      ++      substr                 |
| 228 | 221 | simprd 479 |
. . . . . . . . . . . . . . 15
 

                |
| 229 | | s111 13395 |
. . . . . . . . . . . . . . . . 17
                       
       |
| 230 | 91, 106, 229 | syl2anc 693 |
. . . . . . . . . . . . . . . 16
             
       |
| 231 | 230 | adantr 481 |
. . . . . . . . . . . . . . 15
 

              
       |
| 232 | 228, 231 | mpbid 222 |
. . . . . . . . . . . . . 14
 

        |
| 233 | 232 | fveq2d 6195 |
. . . . . . . . . . . . 13
 

                |
| 234 | 8 | efgmnvl 18127 |
. . . . . . . . . . . . . . 15
  
          |
| 235 | 102, 234 | syl 17 |
. . . . . . . . . . . . . 14
           |
| 236 | 235 | adantr 481 |
. . . . . . . . . . . . 13
 

            |
| 237 | 233, 236 | eqtrd 2656 |
. . . . . . . . . . . 12
 

        |
| 238 | 237 | s1eqd 13381 |
. . . . . . . . . . 11
 

                |
| 239 | 238 | oveq1d 6665 |
. . . . . . . . . 10
 

           ++      substr                   ++      substr                |
| 240 | 217 | simprd 479 |
. . . . . . . . . 10
 

           ++      substr                   substr               |
| 241 | 239, 240 | eqtr3d 2658 |
. . . . . . . . 9
 

       ++      substr                   substr               |
| 242 | 241 | oveq2d 6666 |
. . . . . . . 8
 

       
substr     ++      ++      substr                     substr  
  ++     
substr                |
| 243 | 223, 227,
242 | 3eqtrd 2660 |
. . . . . . 7
 

       
substr     ++      substr                    substr     ++      substr                |
| 244 | 89, 243 | mtand 691 |
. . . . . 6
     |
| 245 | 244 | pm2.21d 118 |
. . . . 5
               |
| 246 | | elfzelz 12342 |
. . . . . . . . . . . 12
               |
| 247 | 74, 246 | syl 17 |
. . . . . . . . . . 11
   |
| 248 | 247 | zcnd 11483 |
. . . . . . . . . 10
   |
| 249 | | 1cnd 10056 |
. . . . . . . . . 10
   |
| 250 | 248, 249,
249 | addassd 10062 |
. . . . . . . . 9
           |
| 251 | | df-2 11079 |
. . . . . . . . . 10
   |
| 252 | 251 | oveq2i 6661 |
. . . . . . . . 9
       |
| 253 | 250, 252 | syl6eqr 2674 |
. . . . . . . 8
         |
| 254 | 253 | fveq2d 6195 |
. . . . . . 7
     
      
    |
| 255 | 254 | eleq2d 2687 |
. . . . . 6
         
         |
| 256 | 3, 7, 8, 9, 10, 11 | efgsfo 18152 |
. . . . . . . . . 10
     |
| 257 | | swrdcl 13419 |
. . . . . . . . . . . . 13
     Word  
     substr               Word     |
| 258 | 37, 257 | syl 17 |
. . . . . . . . . . . 12
     
substr               Word     |
| 259 | | ccatcl 13359 |
. . . . . . . . . . . 12
      
substr     Word        substr               Word   
      substr     ++      substr                Word     |
| 260 | 123, 258,
259 | syl2anc 693 |
. . . . . . . . . . 11
       substr  
  ++     
substr                Word     |
| 261 | 3 | efgrcl 18128 |
. . . . . . . . . . . . 13
     
Word      |
| 262 | 36, 261 | syl 17 |
. . . . . . . . . . . 12
  Word      |
| 263 | 262 | simprd 479 |
. . . . . . . . . . 11
 Word     |
| 264 | 260, 263 | eleqtrrd 2704 |
. . . . . . . . . 10
       substr  
  ++     
substr                  |
| 265 | | foelrn 6378 |
. . . . . . . . . 10
            substr     ++     
substr                         substr     ++      substr                      |
| 266 | 256, 264,
265 | sylancr 695 |
. . . . . . . . 9
         substr  
  ++     
substr                      |
| 267 | 266 | adantr 481 |
. . . . . . . 8
 
      
        substr     ++      substr                      |
| 268 | 20 | ad2antrr 762 |
. . . . . . . . 9
                 substr  
  ++     
substr                      
           
       
                     |
| 269 | 6 | ad2antrr 762 |
. . . . . . . . 9
                 substr  
  ++     
substr                     
  |
| 270 | 21 | ad2antrr 762 |
. . . . . . . . 9
                 substr  
  ++     
substr                     
  |
| 271 | 22 | ad2antrr 762 |
. . . . . . . . 9
                 substr  
  ++     
substr                                |
| 272 | 23 | ad2antrr 762 |
. . . . . . . . 9
                 substr  
  ++     
substr                                |
| 273 | 38 | ad2antrr 762 |
. . . . . . . . 9
                 substr  
  ++     
substr                     
              |
| 274 | 74 | ad2antrr 762 |
. . . . . . . . 9
                 substr  
  ++     
substr                     
              |
| 275 | 91 | ad2antrr 762 |
. . . . . . . . 9
                 substr  
  ++     
substr                     
    |
| 276 | 102 | ad2antrr 762 |
. . . . . . . . 9
                 substr  
  ++     
substr                     
    |
| 277 | 90 | ad2antrr 762 |
. . . . . . . . 9
                 substr  
  ++     
substr                                        |
| 278 | 101 | ad2antrr 762 |
. . . . . . . . 9
                 substr  
  ++     
substr                                        |
| 279 | 2 | ad2antrr 762 |
. . . . . . . . 9
                 substr  
  ++     
substr                                |
| 280 | | simplr 792 |
. . . . . . . . 9
                 substr  
  ++     
substr                     
   
    |
| 281 | | simprl 794 |
. . . . . . . . 9
                 substr  
  ++     
substr                        |
| 282 | | simprr 796 |
. . . . . . . . . 10
                 substr  
  ++     
substr                            substr  
  ++     
substr                      |
| 283 | 282 | eqcomd 2628 |
. . . . . . . . 9
                 substr  
  ++     
substr                                substr     ++      substr                  |
| 284 | 3, 7, 8, 9, 10, 11, 268, 269, 270, 271, 272, 19, 60, 273, 274, 275, 276, 277, 278, 279, 280, 281, 283 | efgredlemd 18157 |
. . . . . . . 8
                 substr  
  ++     
substr                                |
| 285 | 267, 284 | rexlimddv 3035 |
. . . . . . 7
 
      
          |
| 286 | 285 | ex 450 |
. . . . . 6
                   |
| 287 | 255, 286 | sylbid 230 |
. . . . 5
                     |
| 288 | 245, 287 | jaod 395 |
. . . 4
         
   
           |
| 289 | 159, 288 | syl5 34 |
. . 3
                   |
| 290 | 158, 289 | jaod 395 |
. 2
         
           |
| 291 | 1, 290 | syl5 34 |
1
                 |