Proof of Theorem pfxeq
Step | Hyp | Ref
| Expression |
1 | | pfxcl 41386 |
. . . . 5
 Word  prefix  Word   |
2 | | pfxcl 41386 |
. . . . 5
 Word  prefix  Word   |
3 | 1, 2 | anim12i 590 |
. . . 4
  Word
Word    prefix  Word

prefix  Word    |
4 | 3 | 3ad2ant1 1082 |
. . 3
   Word
Word  
     
        prefix
 Word  prefix  Word    |
5 | | eqwrd 13346 |
. . 3
   prefix  Word  prefix  Word 
  prefix   prefix 
     prefix       prefix   
 ..^    prefix       prefix       prefix         |
6 | 4, 5 | syl 17 |
. 2
   Word
Word  
     
        prefix
  prefix       prefix       prefix     ..^    prefix       prefix       prefix         |
7 | | simpl 473 |
. . . . . 6
  Word
Word  Word   |
8 | 7 | 3ad2ant1 1082 |
. . . . 5
   Word
Word  
     
      Word   |
9 | | simpl 473 |
. . . . . . 7
 

  |
10 | 9 | 3ad2ant2 1083 |
. . . . . 6
   Word
Word  
     
        |
11 | | lencl 13324 |
. . . . . . . 8
 Word       |
12 | 11 | adantr 481 |
. . . . . . 7
  Word
Word        |
13 | 12 | 3ad2ant1 1082 |
. . . . . 6
   Word
Word  
     
            |
14 | | simpl 473 |
. . . . . . 7
 
   
    
      |
15 | 14 | 3ad2ant3 1084 |
. . . . . 6
   Word
Word  
     
            |
16 | | elfz2nn0 12431 |
. . . . . 6
        
    
       |
17 | 10, 13, 15, 16 | syl3anbrc 1246 |
. . . . 5
   Word
Word  
     
                |
18 | | pfxlen 41391 |
. . . . 5
  Word
             prefix     |
19 | 8, 17, 18 | syl2anc 693 |
. . . 4
   Word
Word  
     
          prefix     |
20 | | simpr 477 |
. . . . . 6
  Word
Word  Word   |
21 | 20 | 3ad2ant1 1082 |
. . . . 5
   Word
Word  
     
      Word   |
22 | | simpr 477 |
. . . . . . 7
 

  |
23 | 22 | 3ad2ant2 1083 |
. . . . . 6
   Word
Word  
     
        |
24 | | lencl 13324 |
. . . . . . . 8
 Word       |
25 | 24 | adantl 482 |
. . . . . . 7
  Word
Word        |
26 | 25 | 3ad2ant1 1082 |
. . . . . 6
   Word
Word  
     
            |
27 | | simpr 477 |
. . . . . . 7
 
   
    
      |
28 | 27 | 3ad2ant3 1084 |
. . . . . 6
   Word
Word  
     
            |
29 | | elfz2nn0 12431 |
. . . . . 6
        
    
       |
30 | 23, 26, 28, 29 | syl3anbrc 1246 |
. . . . 5
   Word
Word  
     
                |
31 | | pfxlen 41391 |
. . . . 5
  Word
             prefix     |
32 | 21, 30, 31 | syl2anc 693 |
. . . 4
   Word
Word  
     
          prefix     |
33 | 19, 32 | eqeq12d 2637 |
. . 3
   Word
Word  
     
           prefix       prefix  
   |
34 | 33 | anbi1d 741 |
. 2
   Word
Word  
     
            prefix       prefix     ..^    prefix       prefix       prefix     

  ..^    prefix       prefix       prefix         |
35 | 8 | adantr 481 |
. . . . . . 7
    Word Word 
      
       Word   |
36 | 17 | adantr 481 |
. . . . . . 7
    Word Word 
      
                 |
37 | 35, 36, 18 | syl2anc 693 |
. . . . . 6
    Word Word 
      
           prefix     |
38 | 37 | oveq2d 6666 |
. . . . 5
    Word Word 
      
        ..^    prefix     ..^   |
39 | 38 | raleqdv 3144 |
. . . 4
    Word Word 
      
        
 ..^    prefix       prefix       prefix       ..^    prefix       prefix        |
40 | 35 | adantr 481 |
. . . . . . 7
     Word Word  
     
        ..^ 
Word   |
41 | 36 | adantr 481 |
. . . . . . 7
     Word Word  
     
        ..^ 
          |
42 | | simpr 477 |
. . . . . . 7
     Word Word  
     
        ..^ 
 ..^   |
43 | | pfxfv 41399 |
. . . . . . 7
  Word
         ..^ 
  prefix           |
44 | 40, 41, 42, 43 | syl3anc 1326 |
. . . . . 6
     Word Word  
     
        ..^ 
  prefix           |
45 | 21 | ad2antrr 762 |
. . . . . . 7
     Word Word  
     
        ..^ 
Word   |
46 | 30 | ad2antrr 762 |
. . . . . . 7
     Word Word  
     
        ..^ 
          |
47 | | oveq2 6658 |
. . . . . . . . . 10
  ..^  ..^   |
48 | 47 | eleq2d 2687 |
. . . . . . . . 9
   ..^
 ..^    |
49 | 48 | adantl 482 |
. . . . . . . 8
    Word Word 
      
         ..^
 ..^    |
50 | 49 | biimpa 501 |
. . . . . . 7
     Word Word  
     
        ..^ 
 ..^   |
51 | | pfxfv 41399 |
. . . . . . 7
  Word
         ..^ 
  prefix           |
52 | 45, 46, 50, 51 | syl3anc 1326 |
. . . . . 6
     Word Word  
     
        ..^ 
  prefix           |
53 | 44, 52 | eqeq12d 2637 |
. . . . 5
     Word Word  
     
        ..^ 
   prefix
      prefix    
           |
54 | 53 | ralbidva 2985 |
. . . 4
    Word Word 
      
        
 ..^    prefix       prefix       ..^             |
55 | 39, 54 | bitrd 268 |
. . 3
    Word Word 
      
        
 ..^    prefix       prefix       prefix       ..^             |
56 | 55 | pm5.32da 673 |
. 2
   Word
Word  
     
          ..^    prefix       prefix       prefix         ..^              |
57 | 6, 34, 56 | 3bitrd 294 |
1
   Word
Word  
     
        prefix
  prefix     ..^              |