| Step | Hyp | Ref
| Expression |
| 1 | | swrdsb0eq 11118 |
. . . . . . 7
   Word
Word  
   substr      substr       |
| 2 | 1 | 3expa 1206 |
. . . . . 6
    Word Word 
     substr
     substr       |
| 3 | 2 | ancoms 268 |
. . . . 5
 
  Word Word 
     substr      substr       |
| 4 | 3 | 3adantr3 1161 |
. . . 4
 
  Word Word 
   ♯ 
♯      substr      substr       |
| 5 | | ral0 3562 |
. . . . . . . 8
          |
| 6 | | nn0z 9392 |
. . . . . . . . . . 11

  |
| 7 | | nn0z 9392 |
. . . . . . . . . . 11

  |
| 8 | | fzon 10289 |
. . . . . . . . . . 11
 
   ..^    |
| 9 | 6, 7, 8 | syl2an 289 |
. . . . . . . . . 10
 
   ..^    |
| 10 | 9 | biimpa 296 |
. . . . . . . . 9
   
  ..^   |
| 11 | 10 | raleqdv 2708 |
. . . . . . . 8
   
    ..^         
            |
| 12 | 5, 11 | mpbiri 168 |
. . . . . . 7
   
   ..^            |
| 13 | 12 | ex 115 |
. . . . . 6
 
    ..^             |
| 14 | 13 | 3ad2ant2 1022 |
. . . . 5
   Word
Word  
  ♯ 
♯       ..^             |
| 15 | 14 | impcom 125 |
. . . 4
 
  Word Word 
   ♯ 
♯       ..^            |
| 16 | 4, 15 | 2thd 175 |
. . 3
 
  Word Word 
   ♯ 
♯       substr      substr    
  ..^             |
| 17 | 16 | ancoms 268 |
. 2
    Word Word 
   ♯ 
♯       substr      substr       ..^             |
| 18 | | simp1l 1024 |
. . . . . . 7
   Word
Word  
  ♯ 
♯   
Word   |
| 19 | | simp2l 1026 |
. . . . . . . 8
   Word
Word  
  ♯ 
♯   
  |
| 20 | 19 | nn0zd 9493 |
. . . . . . 7
   Word
Word  
  ♯ 
♯   
  |
| 21 | | simp2r 1027 |
. . . . . . . 8
   Word
Word  
  ♯ 
♯   
  |
| 22 | 21 | nn0zd 9493 |
. . . . . . 7
   Word
Word  
  ♯ 
♯   
  |
| 23 | | swrdclg 11103 |
. . . . . . 7
  Word
  substr     Word   |
| 24 | 18, 20, 22, 23 | syl3anc 1250 |
. . . . . 6
   Word
Word  
  ♯ 
♯     substr
    Word   |
| 25 | | simp1r 1025 |
. . . . . . 7
   Word
Word  
  ♯ 
♯   
Word   |
| 26 | | swrdclg 11103 |
. . . . . . 7
  Word
  substr     Word   |
| 27 | 25, 20, 22, 26 | syl3anc 1250 |
. . . . . 6
   Word
Word  
  ♯ 
♯     substr
    Word   |
| 28 | | eqwrd 11034 |
. . . . . 6
   substr     Word  substr     Word 
  substr      substr      ♯  substr      ♯  substr        ..^ ♯  substr  
       substr          substr            |
| 29 | 24, 27, 28 | syl2anc 411 |
. . . . 5
   Word
Word  
  ♯ 
♯      substr      substr      ♯  substr      ♯  substr        ..^ ♯  substr  
       substr          substr            |
| 30 | 29 | adantl 277 |
. . . 4
    Word Word 
   ♯ 
♯       substr      substr    
 ♯  substr      ♯  substr  
     ..^ ♯  substr          substr          substr            |
| 31 | | swrdsbslen 11119 |
. . . . . 6
   Word
Word  
  ♯ 
♯    ♯  substr      ♯  substr  
     |
| 32 | 31 | adantl 277 |
. . . . 5
    Word Word 
   ♯ 
♯     ♯  substr  
   ♯  substr        |
| 33 | 32 | biantrurd 305 |
. . . 4
    Word Word 
   ♯ 
♯        ..^ ♯  substr          substr          substr         ♯  substr      ♯  substr        ..^ ♯  substr  
       substr          substr            |
| 34 | | zltnle 9418 |
. . . . . . . 8
 
 
   |
| 35 | 20, 22, 34 | syl2anc 411 |
. . . . . . 7
   Word
Word  
  ♯ 
♯    
   |
| 36 | 19 | nn0red 9349 |
. . . . . . . 8
   Word
Word  
  ♯ 
♯   
  |
| 37 | 21 | nn0red 9349 |
. . . . . . . 8
   Word
Word  
  ♯ 
♯   
  |
| 38 | | ltle 8160 |
. . . . . . . 8
 
 
   |
| 39 | 36, 37, 38 | syl2anc 411 |
. . . . . . 7
   Word
Word  
  ♯ 
♯    
   |
| 40 | 35, 39 | sylbird 170 |
. . . . . 6
   Word
Word  
  ♯ 
♯        |
| 41 | | simpl1l 1051 |
. . . . . . . . . . 11
    Word Word 
   ♯ 
♯    
Word   |
| 42 | | simpl2l 1053 |
. . . . . . . . . . . 12
    Word Word 
   ♯ 
♯    
  |
| 43 | 6, 7 | anim12i 338 |
. . . . . . . . . . . . . . . 16
 
     |
| 44 | 43 | 3ad2ant2 1022 |
. . . . . . . . . . . . . . 15
   Word
Word  
  ♯ 
♯        |
| 45 | 44 | anim1i 340 |
. . . . . . . . . . . . . 14
    Word Word 
   ♯ 
♯           |
| 46 | | df-3an 983 |
. . . . . . . . . . . . . 14
 

 
    |
| 47 | 45, 46 | sylibr 134 |
. . . . . . . . . . . . 13
    Word Word 
   ♯ 
♯         |
| 48 | | eluz2 9654 |
. . . . . . . . . . . . 13
         |
| 49 | 47, 48 | sylibr 134 |
. . . . . . . . . . . 12
    Word Word 
   ♯ 
♯    
      |
| 50 | 42, 49 | jca 306 |
. . . . . . . . . . 11
    Word Word 
   ♯ 
♯             |
| 51 | | simpl3l 1055 |
. . . . . . . . . . 11
    Word Word 
   ♯ 
♯     ♯    |
| 52 | | swrdlen2 11115 |
. . . . . . . . . . 11
  Word 
     ♯  
♯  substr          |
| 53 | 41, 50, 51, 52 | syl3anc 1250 |
. . . . . . . . . 10
    Word Word 
   ♯ 
♯     ♯  substr          |
| 54 | 53 | oveq2d 5960 |
. . . . . . . . 9
    Word Word 
   ♯ 
♯      ..^ ♯  substr        ..^     |
| 55 | 54 | raleqdv 2708 |
. . . . . . . 8
    Word Word 
   ♯ 
♯        ..^ ♯  substr          substr          substr        
 ..^      substr          substr           |
| 56 | | 0zd 9384 |
. . . . . . . . . 10
   Word
Word  
  ♯ 
♯      |
| 57 | | zsubcl 9413 |
. . . . . . . . . . . 12
 
     |
| 58 | 7, 6, 57 | syl2anr 290 |
. . . . . . . . . . 11
 
     |
| 59 | 58 | 3ad2ant2 1022 |
. . . . . . . . . 10
   Word
Word  
  ♯ 
♯        |
| 60 | 6 | adantr 276 |
. . . . . . . . . . 11
 

  |
| 61 | 60 | 3ad2ant2 1022 |
. . . . . . . . . 10
   Word
Word  
  ♯ 
♯   
  |
| 62 | | fzoshftral 10367 |
. . . . . . . . . 10
  

    ..^      substr          substr        
   ..^          ![]. ].](_drbrack.gif)   substr          substr           |
| 63 | 56, 59, 61, 62 | syl3anc 1250 |
. . . . . . . . 9
   Word
Word  
  ♯ 
♯       ..^      substr          substr        
   ..^          ![]. ].](_drbrack.gif)   substr          substr           |
| 64 | 63 | adantr 276 |
. . . . . . . 8
    Word Word 
   ♯ 
♯        ..^      substr          substr        
   ..^          ![]. ].](_drbrack.gif)   substr          substr           |
| 65 | | nn0cn 9305 |
. . . . . . . . . . . . 13

  |
| 66 | | nn0cn 9305 |
. . . . . . . . . . . . 13

  |
| 67 | | addlid 8211 |
. . . . . . . . . . . . . . 15
     |
| 68 | 67 | adantl 277 |
. . . . . . . . . . . . . 14
 
     |
| 69 | | npcan 8281 |
. . . . . . . . . . . . . 14
 
       |
| 70 | 68, 69 | oveq12d 5962 |
. . . . . . . . . . . . 13
 
    ..^      ..^   |
| 71 | 65, 66, 70 | syl2anr 290 |
. . . . . . . . . . . 12
 
    ..^      ..^   |
| 72 | 71 | 3ad2ant2 1022 |
. . . . . . . . . . 11
   Word
Word  
  ♯ 
♯       ..^      ..^   |
| 73 | 72 | adantr 276 |
. . . . . . . . . 10
    Word Word 
   ♯ 
♯        ..^      ..^   |
| 74 | 73 | raleqdv 2708 |
. . . . . . . . 9
    Word Word 
   ♯ 
♯          ..^          ![]. ].](_drbrack.gif)   substr          substr        
 ..^      ![]. ].](_drbrack.gif)   substr
         substr           |
| 75 | | elfzoelz 10269 |
. . . . . . . . . . . . . . 15
  ..^
  |
| 76 | 75 | adantl 277 |
. . . . . . . . . . . . . 14
     Word Word  
  ♯ 
♯    
 ..^    |
| 77 | 20 | ad2antrr 488 |
. . . . . . . . . . . . . 14
     Word Word  
  ♯ 
♯    
 ..^ 
  |
| 78 | 76, 77 | zsubcld 9500 |
. . . . . . . . . . . . 13
     Word Word  
  ♯ 
♯    
 ..^      |
| 79 | 78 | elexd 2785 |
. . . . . . . . . . . 12
     Word Word  
  ♯ 
♯    
 ..^      |
| 80 | | sbceqg 3109 |
. . . . . . . . . . . . 13
        ![]. ].](_drbrack.gif)   substr          substr            ![]_ ]_](_urbrack.gif)   substr            ![]_ ]_](_urbrack.gif)   substr
          |
| 81 | | csbfvg 5616 |
. . . . . . . . . . . . . 14
       ![]_ ]_](_urbrack.gif)   substr
         substr            |
| 82 | | csbfvg 5616 |
. . . . . . . . . . . . . 14
       ![]_ ]_](_urbrack.gif)   substr
         substr            |
| 83 | 81, 82 | eqeq12d 2220 |
. . . . . . . . . . . . 13
        ![]_ ]_](_urbrack.gif)   substr            ![]_ ]_](_urbrack.gif)   substr
         substr            substr             |
| 84 | 80, 83 | bitrd 188 |
. . . . . . . . . . . 12
        ![]. ].](_drbrack.gif)   substr          substr          substr            substr             |
| 85 | 79, 84 | syl 14 |
. . . . . . . . . . 11
     Word Word  
  ♯ 
♯    
 ..^       ![]. ].](_drbrack.gif)   substr          substr          substr            substr             |
| 86 | 41, 50, 51 | 3jca 1180 |
. . . . . . . . . . . . 13
    Word Word 
   ♯ 
♯      Word       ♯     |
| 87 | | swrdfv2 11116 |
. . . . . . . . . . . . 13
   Word       ♯  
 ..^    substr                |
| 88 | 86, 87 | sylan 283 |
. . . . . . . . . . . 12
     Word Word  
  ♯ 
♯    
 ..^    substr                |
| 89 | | simpl1r 1052 |
. . . . . . . . . . . . . 14
    Word Word 
   ♯ 
♯    
Word   |
| 90 | | simpl3r 1056 |
. . . . . . . . . . . . . 14
    Word Word 
   ♯ 
♯     ♯    |
| 91 | 89, 50, 90 | 3jca 1180 |
. . . . . . . . . . . . 13
    Word Word 
   ♯ 
♯      Word       ♯     |
| 92 | | swrdfv2 11116 |
. . . . . . . . . . . . 13
   Word       ♯  
 ..^    substr                |
| 93 | 91, 92 | sylan 283 |
. . . . . . . . . . . 12
     Word Word  
  ♯ 
♯    
 ..^    substr                |
| 94 | 88, 93 | eqeq12d 2220 |
. . . . . . . . . . 11
     Word Word  
  ♯ 
♯    
 ..^     substr            substr                     |
| 95 | 85, 94 | bitrd 188 |
. . . . . . . . . 10
     Word Word  
  ♯ 
♯    
 ..^       ![]. ].](_drbrack.gif)   substr          substr                   |
| 96 | 95 | ralbidva 2502 |
. . . . . . . . 9
    Word Word 
   ♯ 
♯        ..^      ![]. ].](_drbrack.gif)   substr          substr        
 ..^             |
| 97 | 74, 96 | bitrd 188 |
. . . . . . . 8
    Word Word 
   ♯ 
♯          ..^          ![]. ].](_drbrack.gif)   substr          substr        
 ..^             |
| 98 | 55, 64, 97 | 3bitrd 214 |
. . . . . . 7
    Word Word 
   ♯ 
♯        ..^ ♯  substr          substr          substr        
 ..^             |
| 99 | 98 | ex 115 |
. . . . . 6
   Word
Word  
  ♯ 
♯        ..^ ♯  substr          substr          substr        
 ..^              |
| 100 | 40, 99 | syld 45 |
. . . . 5
   Word
Word  
  ♯ 
♯        ..^ ♯  substr          substr          substr        
 ..^              |
| 101 | 100 | impcom 125 |
. . . 4
    Word Word 
   ♯ 
♯        ..^ ♯  substr          substr          substr        
 ..^             |
| 102 | 30, 33, 101 | 3bitr2d 216 |
. . 3
    Word Word 
   ♯ 
♯       substr      substr    
  ..^             |
| 103 | 102 | ancoms 268 |
. 2
    Word Word 
   ♯ 
♯   
   substr      substr    
  ..^             |
| 104 | 44 | simprd 114 |
. . . 4
   Word
Word  
  ♯ 
♯   
  |
| 105 | | zdcle 9449 |
. . . 4
 
 DECID   |
| 106 | 104, 61, 105 | syl2anc 411 |
. . 3
   Word
Word  
  ♯ 
♯    DECID   |
| 107 | | exmiddc 838 |
. . 3
DECID 
   |
| 108 | 106, 107 | syl 14 |
. 2
   Word
Word  
  ♯ 
♯        |
| 109 | 17, 103, 108 | mpjaodan 800 |
1
   Word
Word  
  ♯ 
♯      substr      substr       ..^             |