| Step | Hyp | Ref
| Expression |
| 1 | | ccatcl 13359 |
. . . . 5
  Word
Word   ++  Word   |
| 2 | | ccatcl 13359 |
. . . . 5
   ++  Word Word    ++  ++  Word   |
| 3 | 1, 2 | stoic3 1701 |
. . . 4
  Word
Word Word    ++  ++  Word   |
| 4 | | wrdf 13310 |
. . . 4
   ++  ++  Word   ++  ++     ..^     ++  ++        |
| 5 | | ffn 6045 |
. . . 4
   ++  ++     ..^     ++  ++     
  ++  ++   ..^     ++  ++      |
| 6 | 3, 4, 5 | 3syl 18 |
. . 3
  Word
Word Word    ++  ++   ..^     ++  ++      |
| 7 | | ccatlen 13360 |
. . . . . . 7
   ++  Word Word       ++  ++        ++          |
| 8 | 1, 7 | stoic3 1701 |
. . . . . 6
  Word
Word Word       ++  ++        ++          |
| 9 | | ccatlen 13360 |
. . . . . . . 8
  Word
Word      ++               |
| 10 | 9 | 3adant3 1081 |
. . . . . . 7
  Word
Word Word      ++               |
| 11 | 10 | oveq1d 6665 |
. . . . . 6
  Word
Word Word       ++                          |
| 12 | 8, 11 | eqtrd 2656 |
. . . . 5
  Word
Word Word       ++  ++                     |
| 13 | 12 | oveq2d 6666 |
. . . 4
  Word
Word Word   ..^     ++  ++     ..^                   |
| 14 | 13 | fneq2d 5982 |
. . 3
  Word
Word Word     ++  ++   ..^     ++  ++      ++  ++   ..^                    |
| 15 | 6, 14 | mpbid 222 |
. 2
  Word
Word Word    ++  ++   ..^                   |
| 16 | | simp1 1061 |
. . . . 5
  Word
Word Word  Word   |
| 17 | | ccatcl 13359 |
. . . . . 6
  Word
Word   ++  Word   |
| 18 | 17 | 3adant1 1079 |
. . . . 5
  Word
Word Word   ++  Word   |
| 19 | | ccatcl 13359 |
. . . . 5
  Word  ++
 Word   ++  ++   Word   |
| 20 | 16, 18, 19 | syl2anc 693 |
. . . 4
  Word
Word Word   ++  ++   Word   |
| 21 | | wrdf 13310 |
. . . 4
  ++  ++   Word  ++  ++      ..^    ++  ++         |
| 22 | | ffn 6045 |
. . . 4
  ++  ++      ..^    ++  ++        ++  ++    ..^    ++  ++       |
| 23 | 20, 21, 22 | 3syl 18 |
. . 3
  Word
Word Word   ++  ++    ..^    ++  ++       |
| 24 | | ccatlen 13360 |
. . . . . . . 8
  Word
Word      ++               |
| 25 | 24 | 3adant1 1079 |
. . . . . . 7
  Word
Word Word      ++               |
| 26 | 25 | oveq2d 6666 |
. . . . . 6
  Word
Word Word           ++                      |
| 27 | | ccatlen 13360 |
. . . . . . 7
  Word  ++
 Word      ++  ++             ++      |
| 28 | 16, 18, 27 | syl2anc 693 |
. . . . . 6
  Word
Word Word      ++  ++             ++      |
| 29 | | lencl 13324 |
. . . . . . . . 9
 Word       |
| 30 | 29 | 3ad2ant1 1082 |
. . . . . . . 8
  Word
Word Word        |
| 31 | 30 | nn0cnd 11353 |
. . . . . . 7
  Word
Word Word        |
| 32 | | lencl 13324 |
. . . . . . . . 9
 Word       |
| 33 | 32 | 3ad2ant2 1083 |
. . . . . . . 8
  Word
Word Word        |
| 34 | 33 | nn0cnd 11353 |
. . . . . . 7
  Word
Word Word        |
| 35 | | lencl 13324 |
. . . . . . . . 9
 Word       |
| 36 | 35 | 3ad2ant3 1084 |
. . . . . . . 8
  Word
Word Word        |
| 37 | 36 | nn0cnd 11353 |
. . . . . . 7
  Word
Word Word        |
| 38 | 31, 34, 37 | addassd 10062 |
. . . . . 6
  Word
Word Word                                    |
| 39 | 26, 28, 38 | 3eqtr4d 2666 |
. . . . 5
  Word
Word Word      ++  ++                      |
| 40 | 39 | oveq2d 6666 |
. . . 4
  Word
Word Word   ..^    ++  ++      ..^                   |
| 41 | 40 | fneq2d 5982 |
. . 3
  Word
Word Word    ++  ++    ..^    ++  ++      ++  ++    ..^                    |
| 42 | 23, 41 | mpbid 222 |
. 2
  Word
Word Word   ++  ++    ..^                   |
| 43 | 30 | nn0zd 11480 |
. . . 4
  Word
Word Word        |
| 44 | | fzospliti 12500 |
. . . . 5
   ..^                        ..^          ..^                    |
| 45 | 44 | ancoms 469 |
. . . 4
     
 ..^                 
  ..^          ..^                    |
| 46 | 43, 45 | sylan 488 |
. . 3
   Word
Word
Word 
 ..^                    ..^          ..^                    |
| 47 | | simpl1 1064 |
. . . . . 6
   Word
Word
Word 
 ..^     
Word   |
| 48 | | simpl2 1065 |
. . . . . 6
   Word
Word
Word 
 ..^     
Word   |
| 49 | | simpr 477 |
. . . . . 6
   Word
Word
Word 
 ..^     
 ..^       |
| 50 | | ccatval1 13361 |
. . . . . 6
  Word
Word  ..^        ++           |
| 51 | 47, 48, 49, 50 | syl3anc 1326 |
. . . . 5
   Word
Word
Word 
 ..^        ++           |
| 52 | 1 | 3adant3 1081 |
. . . . . . 7
  Word
Word Word   ++  Word   |
| 53 | 52 | adantr 481 |
. . . . . 6
   Word
Word
Word 
 ..^       ++  Word   |
| 54 | | simpl3 1066 |
. . . . . 6
   Word
Word
Word 
 ..^     
Word   |
| 55 | | uzid 11702 |
. . . . . . . . . . 11
    
              |
| 56 | 43, 55 | syl 17 |
. . . . . . . . . 10
  Word
Word Word                |
| 57 | | uzaddcl 11744 |
. . . . . . . . . 10
                                       |
| 58 | 56, 33, 57 | syl2anc 693 |
. . . . . . . . 9
  Word
Word Word                      |
| 59 | | fzoss2 12496 |
. . . . . . . . 9
                    ..^      ..^             |
| 60 | 58, 59 | syl 17 |
. . . . . . . 8
  Word
Word Word   ..^      ..^             |
| 61 | 10 | oveq2d 6666 |
. . . . . . . 8
  Word
Word Word   ..^    ++     ..^             |
| 62 | 60, 61 | sseqtr4d 3642 |
. . . . . . 7
  Word
Word Word   ..^      ..^    ++      |
| 63 | 62 | sselda 3603 |
. . . . . 6
   Word
Word
Word 
 ..^     
 ..^    ++      |
| 64 | | ccatval1 13361 |
. . . . . 6
   ++  Word Word  ..^    ++        ++  ++       ++       |
| 65 | 53, 54, 63, 64 | syl3anc 1326 |
. . . . 5
   Word
Word
Word 
 ..^         ++  ++       ++       |
| 66 | 18 | adantr 481 |
. . . . . 6
   Word
Word
Word 
 ..^       ++  Word   |
| 67 | | ccatval1 13361 |
. . . . . 6
  Word  ++
 Word  ..^        ++  ++            |
| 68 | 47, 66, 49, 67 | syl3anc 1326 |
. . . . 5
   Word
Word
Word 
 ..^        ++  ++            |
| 69 | 51, 65, 68 | 3eqtr4d 2666 |
. . . 4
   Word
Word
Word 
 ..^         ++  ++       ++  ++        |
| 70 | 33 | nn0zd 11480 |
. . . . . . 7
  Word
Word Word        |
| 71 | 43, 70 | zaddcld 11486 |
. . . . . 6
  Word
Word Word              |
| 72 | | fzospliti 12500 |
. . . . . . 7
       ..^                                  ..^                      ..^                    |
| 73 | 72 | ancoms 469 |
. . . . . 6
                 ..^                        ..^                      ..^                    |
| 74 | 71, 73 | sylan 488 |
. . . . 5
   Word
Word
Word 
     ..^                 
      ..^                      ..^                    |
| 75 | | simpl1 1064 |
. . . . . . . . 9
   Word
Word
Word 
     ..^           
Word   |
| 76 | | simpl2 1065 |
. . . . . . . . 9
   Word
Word
Word 
     ..^           
Word   |
| 77 | | simpr 477 |
. . . . . . . . 9
   Word
Word
Word 
     ..^           
     ..^             |
| 78 | | ccatval2 13362 |
. . . . . . . . 9
  Word
Word      ..^              ++        
        |
| 79 | 75, 76, 77, 78 | syl3anc 1326 |
. . . . . . . 8
   Word
Word
Word 
     ..^           
  ++                 |
| 80 | | simpl3 1066 |
. . . . . . . . 9
   Word
Word
Word 
     ..^           
Word   |
| 81 | | fzosubel3 12528 |
. . . . . . . . . . 11
       ..^                       ..^       |
| 82 | 81 | ancoms 469 |
. . . . . . . . . 10
     
     ..^           
       ..^       |
| 83 | 70, 82 | sylan 488 |
. . . . . . . . 9
   Word
Word
Word 
     ..^           
       ..^       |
| 84 | | ccatval1 13361 |
. . . . . . . . 9
  Word
Word        ..^        ++              
        |
| 85 | 76, 80, 83, 84 | syl3anc 1326 |
. . . . . . . 8
   Word
Word
Word 
     ..^           
  ++              
        |
| 86 | 79, 85 | eqtr4d 2659 |
. . . . . . 7
   Word
Word
Word 
     ..^           
  ++       ++    
        |
| 87 | 52 | adantr 481 |
. . . . . . . 8
   Word
Word
Word 
     ..^           
 ++  Word   |
| 88 | | fzoss1 12495 |
. . . . . . . . . . . 12
              ..^            ..^             |
| 89 | | nn0uz 11722 |
. . . . . . . . . . . 12
     |
| 90 | 88, 89 | eleq2s 2719 |
. . . . . . . . . . 11
    
     ..^            ..^             |
| 91 | 30, 90 | syl 17 |
. . . . . . . . . 10
  Word
Word Word       ..^            ..^             |
| 92 | 91, 61 | sseqtr4d 3642 |
. . . . . . . . 9
  Word
Word Word       ..^            ..^    ++      |
| 93 | 92 | sselda 3603 |
. . . . . . . 8
   Word
Word
Word 
     ..^           
 ..^    ++      |
| 94 | 87, 80, 93, 64 | syl3anc 1326 |
. . . . . . 7
   Word
Word
Word 
     ..^           
   ++  ++       ++       |
| 95 | 18 | adantr 481 |
. . . . . . . 8
   Word
Word
Word 
     ..^           
 ++  Word   |
| 96 | | uzid 11702 |
. . . . . . . . . . . . 13
          
                          |
| 97 | 71, 96 | syl 17 |
. . . . . . . . . . . 12
  Word
Word Word                            |
| 98 | | uzaddcl 11744 |
. . . . . . . . . . . 12
                                                               |
| 99 | 97, 36, 98 | syl2anc 693 |
. . . . . . . . . . 11
  Word
Word Word                                  |
| 100 | | fzoss2 12496 |
. . . . . . . . . . 11
                                    ..^                ..^                   |
| 101 | 99, 100 | syl 17 |
. . . . . . . . . 10
  Word
Word Word       ..^                ..^                   |
| 102 | 26, 38 | eqtr4d 2659 |
. . . . . . . . . . 11
  Word
Word Word           ++                      |
| 103 | 102 | oveq2d 6666 |
. . . . . . . . . 10
  Word
Word Word       ..^         ++          ..^                   |
| 104 | 101, 103 | sseqtr4d 3642 |
. . . . . . . . 9
  Word
Word Word       ..^                ..^         ++       |
| 105 | 104 | sselda 3603 |
. . . . . . . 8
   Word
Word
Word 
     ..^           
     ..^         ++       |
| 106 | | ccatval2 13362 |
. . . . . . . 8
  Word  ++
 Word      ..^         ++        ++  ++        ++             |
| 107 | 75, 95, 105, 106 | syl3anc 1326 |
. . . . . . 7
   Word
Word
Word 
     ..^           
  ++  ++        ++             |
| 108 | 86, 94, 107 | 3eqtr4d 2666 |
. . . . . 6
   Word
Word
Word 
     ..^           
   ++  ++       ++  ++        |
| 109 | 10 | oveq2d 6666 |
. . . . . . . . . . 11
  Word
Word Word       ++                  |
| 110 | 109 | adantr 481 |
. . . . . . . . . 10
   Word
Word
Word 
           ..^                       ++                  |
| 111 | | elfzoelz 12470 |
. . . . . . . . . . . . 13
            ..^                
  |
| 112 | 111 | zcnd 11483 |
. . . . . . . . . . . 12
            ..^                
  |
| 113 | 112 | adantl 482 |
. . . . . . . . . . 11
   Word
Word
Word 
           ..^                    |
| 114 | 31 | adantr 481 |
. . . . . . . . . . 11
   Word
Word
Word 
           ..^                        |
| 115 | 34 | adantr 481 |
. . . . . . . . . . 11
   Word
Word
Word 
           ..^                        |
| 116 | 113, 114,
115 | subsub4d 10423 |
. . . . . . . . . 10
   Word
Word
Word 
           ..^                                            |
| 117 | 110, 116 | eqtr4d 2659 |
. . . . . . . . 9
   Word
Word
Word 
           ..^                       ++                  |
| 118 | 117 | fveq2d 6195 |
. . . . . . . 8
   Word
Word
Word 
           ..^                     
    ++                       |
| 119 | | simpl2 1065 |
. . . . . . . . 9
   Word
Word
Word 
           ..^                  Word   |
| 120 | | simpl3 1066 |
. . . . . . . . 9
   Word
Word
Word 
           ..^                  Word   |
| 121 | 38 | oveq2d 6666 |
. . . . . . . . . . . 12
  Word
Word Word             ..^                            ..^                   |
| 122 | 121 | eleq2d 2687 |
. . . . . . . . . . 11
  Word
Word Word              ..^                
           ..^                    |
| 123 | 122 | biimpa 501 |
. . . . . . . . . 10
   Word
Word
Word 
           ..^                             ..^                   |
| 124 | 43 | adantr 481 |
. . . . . . . . . 10
   Word
Word
Word 
           ..^                        |
| 125 | 70 | adantr 481 |
. . . . . . . . . 10
   Word
Word
Word 
           ..^                        |
| 126 | 36 | nn0zd 11480 |
. . . . . . . . . . . 12
  Word
Word Word        |
| 127 | 70, 126 | zaddcld 11486 |
. . . . . . . . . . 11
  Word
Word Word              |
| 128 | 127 | adantr 481 |
. . . . . . . . . 10
   Word
Word
Word 
           ..^                              |
| 129 | | fzosubel2 12527 |
. . . . . . . . . 10
             ..^                                                 ..^             |
| 130 | 123, 124,
125, 128, 129 | syl13anc 1328 |
. . . . . . . . 9
   Word
Word
Word 
           ..^                             ..^             |
| 131 | | ccatval2 13362 |
. . . . . . . . 9
  Word
Word            ..^              ++                             |
| 132 | 119, 120,
130, 131 | syl3anc 1326 |
. . . . . . . 8
   Word
Word
Word 
           ..^                    ++                             |
| 133 | 118, 132 | eqtr4d 2659 |
. . . . . . 7
   Word
Word
Word 
           ..^                     
    ++       ++             |
| 134 | 52 | adantr 481 |
. . . . . . . 8
   Word
Word
Word 
           ..^                   ++  Word
  |
| 135 | 10, 11 | oveq12d 6668 |
. . . . . . . . . 10
  Word
Word Word       ++   ..^     ++                    ..^                   |
| 136 | 135 | eleq2d 2687 |
. . . . . . . . 9
  Word
Word Word        ++   ..^     ++        
           ..^                    |
| 137 | 136 | biimpar 502 |
. . . . . . . 8
   Word
Word
Word 
           ..^                       ++   ..^     ++           |
| 138 | | ccatval2 13362 |
. . . . . . . 8
   ++  Word Word      ++   ..^     ++             ++  ++        
    ++       |
| 139 | 134, 120,
137, 138 | syl3anc 1326 |
. . . . . . 7
   Word
Word
Word 
           ..^                     ++  ++        
    ++       |
| 140 | | simpl1 1064 |
. . . . . . . 8
   Word
Word
Word 
           ..^                  Word   |
| 141 | 18 | adantr 481 |
. . . . . . . 8
   Word
Word
Word 
           ..^                   ++  Word
  |
| 142 | | fzoss1 12495 |
. . . . . . . . . . 11
                              ..^                      ..^                   |
| 143 | 58, 142 | syl 17 |
. . . . . . . . . 10
  Word
Word Word             ..^                      ..^                   |
| 144 | 143, 103 | sseqtr4d 3642 |
. . . . . . . . 9
  Word
Word Word             ..^                      ..^         ++       |
| 145 | 144 | sselda 3603 |
. . . . . . . 8
   Word
Word
Word 
           ..^                       ..^         ++       |
| 146 | 140, 141,
145, 106 | syl3anc 1326 |
. . . . . . 7
   Word
Word
Word 
           ..^                    ++  ++        ++             |
| 147 | 133, 139,
146 | 3eqtr4d 2666 |
. . . . . 6
   Word
Word
Word 
           ..^                     ++  ++       ++  ++        |
| 148 | 108, 147 | jaodan 826 |
. . . . 5
   Word
Word
Word        ..^                      ..^                      ++  ++       ++  ++        |
| 149 | 74, 148 | syldan 487 |
. . . 4
   Word
Word
Word 
     ..^                 
   ++  ++       ++  ++        |
| 150 | 69, 149 | jaodan 826 |
. . 3
   Word
Word
Word    ..^          ..^                      ++  ++       ++  ++        |
| 151 | 46, 150 | syldan 487 |
. 2
   Word
Word
Word 
 ..^                     ++  ++       ++  ++        |
| 152 | 15, 42, 151 | eqfnfvd 6314 |
1
  Word
Word Word    ++  ++   ++  ++     |