Proof of Theorem swrdsbslen
| Step | Hyp | Ref
| Expression |
| 1 | | simpr1 1006 |
. . . . 5
 
  Word Word 
   ♯ 
♯      Word Word    |
| 2 | | simpr2 1007 |
. . . . 5
 
  Word Word 
   ♯ 
♯     
   |
| 3 | | simpl 109 |
. . . . 5
 
  Word Word 
   ♯ 
♯       |
| 4 | | swrdsb0eq 11118 |
. . . . 5
   Word
Word  
   substr      substr       |
| 5 | 1, 2, 3, 4 | syl3anc 1250 |
. . . 4
 
  Word Word 
   ♯ 
♯      substr      substr       |
| 6 | 5 | fveq2d 5580 |
. . 3
 
  Word Word 
   ♯ 
♯     ♯  substr  
   ♯  substr        |
| 7 | 6 | ancoms 268 |
. 2
    Word Word 
   ♯ 
♯     ♯  substr      ♯  substr  
     |
| 8 | | nn0z 9392 |
. . . . . . 7

  |
| 9 | | nn0z 9392 |
. . . . . . 7

  |
| 10 | | zltnle 9418 |
. . . . . . 7
 
 
   |
| 11 | 8, 9, 10 | syl2an 289 |
. . . . . 6
 
 
   |
| 12 | | nn0re 9304 |
. . . . . . 7

  |
| 13 | | nn0re 9304 |
. . . . . . 7

  |
| 14 | | ltle 8160 |
. . . . . . 7
 
 
   |
| 15 | 12, 13, 14 | syl2an 289 |
. . . . . 6
 
 
   |
| 16 | 11, 15 | sylbird 170 |
. . . . 5
 
     |
| 17 | 16 | 3ad2ant2 1022 |
. . . 4
   Word
Word  
  ♯ 
♯        |
| 18 | | simpl1l 1051 |
. . . . . . 7
    Word Word 
   ♯ 
♯    
Word   |
| 19 | | simpl2l 1053 |
. . . . . . 7
    Word Word 
   ♯ 
♯    
  |
| 20 | 8, 9 | anim12i 338 |
. . . . . . . . . . 11
 
     |
| 21 | 20 | 3ad2ant2 1022 |
. . . . . . . . . 10
   Word
Word  
  ♯ 
♯        |
| 22 | 21 | anim1i 340 |
. . . . . . . . 9
    Word Word 
   ♯ 
♯           |
| 23 | | df-3an 983 |
. . . . . . . . 9
 

 
    |
| 24 | 22, 23 | sylibr 134 |
. . . . . . . 8
    Word Word 
   ♯ 
♯         |
| 25 | | eluz2 9654 |
. . . . . . . 8
         |
| 26 | 24, 25 | sylibr 134 |
. . . . . . 7
    Word Word 
   ♯ 
♯    
      |
| 27 | | simpl3l 1055 |
. . . . . . 7
    Word Word 
   ♯ 
♯     ♯    |
| 28 | | swrdlen2 11115 |
. . . . . . 7
  Word 
     ♯  
♯  substr          |
| 29 | 18, 19, 26, 27, 28 | syl121anc 1255 |
. . . . . 6
    Word Word 
   ♯ 
♯     ♯  substr          |
| 30 | | simpl1r 1052 |
. . . . . . 7
    Word Word 
   ♯ 
♯    
Word   |
| 31 | | simpl3r 1056 |
. . . . . . 7
    Word Word 
   ♯ 
♯     ♯    |
| 32 | | swrdlen2 11115 |
. . . . . . 7
  Word 
     ♯  
♯  substr          |
| 33 | 30, 19, 26, 31, 32 | syl121anc 1255 |
. . . . . 6
    Word Word 
   ♯ 
♯     ♯  substr          |
| 34 | 29, 33 | eqtr4d 2241 |
. . . . 5
    Word Word 
   ♯ 
♯     ♯  substr      ♯  substr  
     |
| 35 | 34 | ex 115 |
. . . 4
   Word
Word  
  ♯ 
♯     ♯  substr  
   ♯  substr         |
| 36 | 17, 35 | syld 45 |
. . 3
   Word
Word  
  ♯ 
♯     ♯  substr  
   ♯  substr         |
| 37 | 36 | imp 124 |
. 2
    Word Word 
   ♯ 
♯   
 ♯  substr  
   ♯  substr        |
| 38 | 21 | simprd 114 |
. . . 4
   Word
Word  
  ♯ 
♯   
  |
| 39 | 21 | simpld 112 |
. . . 4
   Word
Word  
  ♯ 
♯   
  |
| 40 | | zdcle 9449 |
. . . 4
 
 DECID   |
| 41 | 38, 39, 40 | syl2anc 411 |
. . 3
   Word
Word  
  ♯ 
♯    DECID   |
| 42 | | exmiddc 838 |
. . 3
DECID 
   |
| 43 | 41, 42 | syl 14 |
. 2
   Word
Word  
  ♯ 
♯        |
| 44 | 7, 37, 43 | mpjaodan 800 |
1
   Word
Word  
  ♯ 
♯    ♯  substr      ♯  substr  
     |