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Theorem pfxwrdsymbg 11270
Description: A prefix of a word is a word over the symbols it consists of. (Contributed by AV, 3-Dec-2022.)
Assertion
Ref Expression
pfxwrdsymbg  |-  ( ( S  e. Word  A  /\  L  e.  NN0 )  -> 
( S prefix  L )  e. Word  ( S " (
0..^ L ) ) )

Proof of Theorem pfxwrdsymbg
StepHypRef Expression
1 pfxval 11254 . 2  |-  ( ( S  e. Word  A  /\  L  e.  NN0 )  -> 
( S prefix  L )  =  ( S substr  <. 0 ,  L >. ) )
2 simpll 527 . . . 4  |-  ( ( ( S  e. Word  A  /\  L  e.  NN0 )  /\  L  <_  ( `  S ) )  ->  S  e. Word  A )
3 simplr 529 . . . . . 6  |-  ( ( ( S  e. Word  A  /\  L  e.  NN0 )  /\  L  <_  ( `  S ) )  ->  L  e.  NN0 )
4 elnn0uz 9793 . . . . . 6  |-  ( L  e.  NN0  <->  L  e.  ( ZZ>=
`  0 ) )
53, 4sylib 122 . . . . 5  |-  ( ( ( S  e. Word  A  /\  L  e.  NN0 )  /\  L  <_  ( `  S ) )  ->  L  e.  ( ZZ>= ` 
0 ) )
6 eluzfz1 10265 . . . . 5  |-  ( L  e.  ( ZZ>= `  0
)  ->  0  e.  ( 0 ... L
) )
75, 6syl 14 . . . 4  |-  ( ( ( S  e. Word  A  /\  L  e.  NN0 )  /\  L  <_  ( `  S ) )  -> 
0  e.  ( 0 ... L ) )
8 simpr 110 . . . . 5  |-  ( ( ( S  e. Word  A  /\  L  e.  NN0 )  /\  L  <_  ( `  S ) )  ->  L  <_  ( `  S )
)
9 lencl 11116 . . . . . . . 8  |-  ( S  e. Word  A  ->  ( `  S )  e.  NN0 )
109nn0zd 9599 . . . . . . 7  |-  ( S  e. Word  A  ->  ( `  S )  e.  ZZ )
112, 10syl 14 . . . . . 6  |-  ( ( ( S  e. Word  A  /\  L  e.  NN0 )  /\  L  <_  ( `  S ) )  -> 
( `  S )  e.  ZZ )
12 elfz5 10251 . . . . . 6  |-  ( ( L  e.  ( ZZ>= ` 
0 )  /\  ( `  S )  e.  ZZ )  ->  ( L  e.  ( 0 ... ( `  S ) )  <->  L  <_  ( `  S ) ) )
135, 11, 12syl2anc 411 . . . . 5  |-  ( ( ( S  e. Word  A  /\  L  e.  NN0 )  /\  L  <_  ( `  S ) )  -> 
( L  e.  ( 0 ... ( `  S
) )  <->  L  <_  ( `  S ) ) )
148, 13mpbird 167 . . . 4  |-  ( ( ( S  e. Word  A  /\  L  e.  NN0 )  /\  L  <_  ( `  S ) )  ->  L  e.  ( 0 ... ( `  S
) ) )
15 swrdwrdsymbg 11244 . . . 4  |-  ( ( S  e. Word  A  /\  0  e.  ( 0 ... L )  /\  L  e.  ( 0 ... ( `  S
) ) )  -> 
( S substr  <. 0 ,  L >. )  e. Word  ( S " ( 0..^ L ) ) )
162, 7, 14, 15syl3anc 1273 . . 3  |-  ( ( ( S  e. Word  A  /\  L  e.  NN0 )  /\  L  <_  ( `  S ) )  -> 
( S substr  <. 0 ,  L >. )  e. Word  ( S " ( 0..^ L ) ) )
17 3mix3 1194 . . . . . 6  |-  ( ( `  S )  <  L  ->  ( 0  <  0  \/  L  <_  0  \/  ( `  S )  <  L ) )
1817adantl 277 . . . . 5  |-  ( ( ( S  e. Word  A  /\  L  e.  NN0 )  /\  ( `  S
)  <  L )  ->  ( 0  <  0  \/  L  <_  0  \/  ( `  S )  <  L ) )
19 simpll 527 . . . . . 6  |-  ( ( ( S  e. Word  A  /\  L  e.  NN0 )  /\  ( `  S
)  <  L )  ->  S  e. Word  A )
20 0zd 9490 . . . . . 6  |-  ( ( ( S  e. Word  A  /\  L  e.  NN0 )  /\  ( `  S
)  <  L )  ->  0  e.  ZZ )
21 nn0z 9498 . . . . . . . 8  |-  ( L  e.  NN0  ->  L  e.  ZZ )
2221adantl 277 . . . . . . 7  |-  ( ( S  e. Word  A  /\  L  e.  NN0 )  ->  L  e.  ZZ )
2322adantr 276 . . . . . 6  |-  ( ( ( S  e. Word  A  /\  L  e.  NN0 )  /\  ( `  S
)  <  L )  ->  L  e.  ZZ )
24 swrdnd 11239 . . . . . 6  |-  ( ( S  e. Word  A  /\  0  e.  ZZ  /\  L  e.  ZZ )  ->  (
( 0  <  0  \/  L  <_  0  \/  ( `  S )  <  L )  ->  ( S substr  <. 0 ,  L >. )  =  (/) ) )
2519, 20, 23, 24syl3anc 1273 . . . . 5  |-  ( ( ( S  e. Word  A  /\  L  e.  NN0 )  /\  ( `  S
)  <  L )  ->  ( ( 0  <  0  \/  L  <_ 
0  \/  ( `  S
)  <  L )  ->  ( S substr  <. 0 ,  L >. )  =  (/) ) )
2618, 25mpd 13 . . . 4  |-  ( ( ( S  e. Word  A  /\  L  e.  NN0 )  /\  ( `  S
)  <  L )  ->  ( S substr  <. 0 ,  L >. )  =  (/) )
27 wrd0 11137 . . . 4  |-  (/)  e. Word  ( S " ( 0..^ L ) )
2826, 27eqeltrdi 2322 . . 3  |-  ( ( ( S  e. Word  A  /\  L  e.  NN0 )  /\  ( `  S
)  <  L )  ->  ( S substr  <. 0 ,  L >. )  e. Word  ( S " ( 0..^ L ) ) )
2910adantr 276 . . . 4  |-  ( ( S  e. Word  A  /\  L  e.  NN0 )  -> 
( `  S )  e.  ZZ )
30 zlelttric 9523 . . . 4  |-  ( ( L  e.  ZZ  /\  ( `  S )  e.  ZZ )  ->  ( L  <_  ( `  S )  \/  ( `  S )  <  L ) )
3122, 29, 30syl2anc 411 . . 3  |-  ( ( S  e. Word  A  /\  L  e.  NN0 )  -> 
( L  <_  ( `  S )  \/  ( `  S )  <  L
) )
3216, 28, 31mpjaodan 805 . 2  |-  ( ( S  e. Word  A  /\  L  e.  NN0 )  -> 
( S substr  <. 0 ,  L >. )  e. Word  ( S " ( 0..^ L ) ) )
331, 32eqeltrd 2308 1  |-  ( ( S  e. Word  A  /\  L  e.  NN0 )  -> 
( S prefix  L )  e. Word  ( S " (
0..^ L ) ) )
Colors of variables: wff set class
Syntax hints:    -> wi 4    /\ wa 104    <-> wb 105    \/ wo 715    \/ w3o 1003    = wceq 1397    e. wcel 2202   (/)c0 3494   <.cop 3672   class class class wbr 4088   "cima 4728   ` cfv 5326  (class class class)co 6017   0cc0 8031    < clt 8213    <_ cle 8214   NN0cn0 9401   ZZcz 9478   ZZ>=cuz 9754   ...cfz 10242  ..^cfzo 10376  ♯chash 11036  Word cword 11112   substr csubstr 11225   prefix cpfx 11252
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-in1 619  ax-in2 620  ax-io 716  ax-5 1495  ax-7 1496  ax-gen 1497  ax-ie1 1541  ax-ie2 1542  ax-8 1552  ax-10 1553  ax-11 1554  ax-i12 1555  ax-bndl 1557  ax-4 1558  ax-17 1574  ax-i9 1578  ax-ial 1582  ax-i5r 1583  ax-13 2204  ax-14 2205  ax-ext 2213  ax-coll 4204  ax-sep 4207  ax-nul 4215  ax-pow 4264  ax-pr 4299  ax-un 4530  ax-setind 4635  ax-iinf 4686  ax-cnex 8122  ax-resscn 8123  ax-1cn 8124  ax-1re 8125  ax-icn 8126  ax-addcl 8127  ax-addrcl 8128  ax-mulcl 8129  ax-addcom 8131  ax-addass 8133  ax-distr 8135  ax-i2m1 8136  ax-0lt1 8137  ax-0id 8139  ax-rnegex 8140  ax-cnre 8142  ax-pre-ltirr 8143  ax-pre-ltwlin 8144  ax-pre-lttrn 8145  ax-pre-apti 8146  ax-pre-ltadd 8147
This theorem depends on definitions:  df-bi 117  df-dc 842  df-3or 1005  df-3an 1006  df-tru 1400  df-fal 1403  df-nf 1509  df-sb 1811  df-eu 2082  df-mo 2083  df-clab 2218  df-cleq 2224  df-clel 2227  df-nfc 2363  df-ne 2403  df-nel 2498  df-ral 2515  df-rex 2516  df-reu 2517  df-rab 2519  df-v 2804  df-sbc 3032  df-csb 3128  df-dif 3202  df-un 3204  df-in 3206  df-ss 3213  df-nul 3495  df-if 3606  df-pw 3654  df-sn 3675  df-pr 3676  df-op 3678  df-uni 3894  df-int 3929  df-iun 3972  df-br 4089  df-opab 4151  df-mpt 4152  df-tr 4188  df-id 4390  df-iord 4463  df-on 4465  df-ilim 4466  df-suc 4468  df-iom 4689  df-xp 4731  df-rel 4732  df-cnv 4733  df-co 4734  df-dm 4735  df-rn 4736  df-res 4737  df-ima 4738  df-iota 5286  df-fun 5328  df-fn 5329  df-f 5330  df-f1 5331  df-fo 5332  df-f1o 5333  df-fv 5334  df-riota 5970  df-ov 6020  df-oprab 6021  df-mpo 6022  df-1st 6302  df-2nd 6303  df-recs 6470  df-frec 6556  df-1o 6581  df-er 6701  df-en 6909  df-dom 6910  df-fin 6911  df-pnf 8215  df-mnf 8216  df-xr 8217  df-ltxr 8218  df-le 8219  df-sub 8351  df-neg 8352  df-inn 9143  df-n0 9402  df-z 9479  df-uz 9755  df-fz 10243  df-fzo 10377  df-ihash 11037  df-word 11113  df-substr 11226  df-pfx 11253
This theorem is referenced by:  wlkres  16229
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