ILE Home Intuitionistic Logic Explorer < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  ILE Home  >  Th. List  >  pfxccatin12d Unicode version

Theorem pfxccatin12d 11325
Description: The subword of a concatenation of two words within both of the concatenated words. (Contributed by AV, 31-May-2018.) (Revised by AV, 10-May-2020.)
Hypotheses
Ref Expression
swrdccatind.l  |-  ( ph  ->  ( `  A )  =  L )
swrdccatind.w  |-  ( ph  ->  ( A  e. Word  V  /\  B  e. Word  V ) )
pfxccatin12d.m  |-  ( ph  ->  M  e.  ( 0 ... L ) )
pfxccatin12d.n  |-  ( ph  ->  N  e.  ( L ... ( L  +  ( `  B ) ) ) )
Assertion
Ref Expression
pfxccatin12d  |-  ( ph  ->  ( ( A ++  B
) substr  <. M ,  N >. )  =  ( ( A substr  <. M ,  L >. ) ++  ( B prefix  ( N  -  L )
) ) )

Proof of Theorem pfxccatin12d
StepHypRef Expression
1 swrdccatind.w . . 3  |-  ( ph  ->  ( A  e. Word  V  /\  B  e. Word  V ) )
2 pfxccatin12d.m . . . 4  |-  ( ph  ->  M  e.  ( 0 ... L ) )
3 pfxccatin12d.n . . . 4  |-  ( ph  ->  N  e.  ( L ... ( L  +  ( `  B ) ) ) )
4 swrdccatind.l . . . . . . 7  |-  ( ph  ->  ( `  A )  =  L )
54oveq2d 6033 . . . . . 6  |-  ( ph  ->  ( 0 ... ( `  A ) )  =  ( 0 ... L
) )
65eleq2d 2301 . . . . 5  |-  ( ph  ->  ( M  e.  ( 0 ... ( `  A
) )  <->  M  e.  ( 0 ... L
) ) )
74oveq1d 6032 . . . . . . 7  |-  ( ph  ->  ( ( `  A
)  +  ( `  B
) )  =  ( L  +  ( `  B
) ) )
84, 7oveq12d 6035 . . . . . 6  |-  ( ph  ->  ( ( `  A
) ... ( ( `  A
)  +  ( `  B
) ) )  =  ( L ... ( L  +  ( `  B
) ) ) )
98eleq2d 2301 . . . . 5  |-  ( ph  ->  ( N  e.  ( ( `  A ) ... ( ( `  A
)  +  ( `  B
) ) )  <->  N  e.  ( L ... ( L  +  ( `  B
) ) ) ) )
106, 9anbi12d 473 . . . 4  |-  ( ph  ->  ( ( M  e.  ( 0 ... ( `  A ) )  /\  N  e.  ( ( `  A ) ... (
( `  A )  +  ( `  B )
) ) )  <->  ( M  e.  ( 0 ... L
)  /\  N  e.  ( L ... ( L  +  ( `  B
) ) ) ) ) )
112, 3, 10mpbir2and 952 . . 3  |-  ( ph  ->  ( M  e.  ( 0 ... ( `  A
) )  /\  N  e.  ( ( `  A
) ... ( ( `  A
)  +  ( `  B
) ) ) ) )
12 eqid 2231 . . . 4  |-  ( `  A
)  =  ( `  A
)
1312pfxccatin12 11313 . . 3  |-  ( ( A  e. Word  V  /\  B  e. Word  V )  ->  ( ( M  e.  ( 0 ... ( `  A ) )  /\  N  e.  ( ( `  A ) ... (
( `  A )  +  ( `  B )
) ) )  -> 
( ( A ++  B
) substr  <. M ,  N >. )  =  ( ( A substr  <. M ,  ( `  A ) >. ) ++  ( B prefix  ( N  -  ( `  A ) ) ) ) ) )
141, 11, 13sylc 62 . 2  |-  ( ph  ->  ( ( A ++  B
) substr  <. M ,  N >. )  =  ( ( A substr  <. M ,  ( `  A ) >. ) ++  ( B prefix  ( N  -  ( `  A ) ) ) ) )
154opeq2d 3869 . . . 4  |-  ( ph  -> 
<. M ,  ( `  A
) >.  =  <. M ,  L >. )
1615oveq2d 6033 . . 3  |-  ( ph  ->  ( A substr  <. M , 
( `  A ) >.
)  =  ( A substr  <. M ,  L >. ) )
174oveq2d 6033 . . . 4  |-  ( ph  ->  ( N  -  ( `  A ) )  =  ( N  -  L
) )
1817oveq2d 6033 . . 3  |-  ( ph  ->  ( B prefix  ( N  -  ( `  A
) ) )  =  ( B prefix  ( N  -  L ) ) )
1916, 18oveq12d 6035 . 2  |-  ( ph  ->  ( ( A substr  <. M , 
( `  A ) >.
) ++  ( B prefix  ( N  -  ( `  A
) ) ) )  =  ( ( A substr  <. M ,  L >. ) ++  ( B prefix  ( N  -  L ) ) ) )
2014, 19eqtrd 2264 1  |-  ( ph  ->  ( ( A ++  B
) substr  <. M ,  N >. )  =  ( ( A substr  <. M ,  L >. ) ++  ( B prefix  ( N  -  L )
) ) )
Colors of variables: wff set class
Syntax hints:    -> wi 4    /\ wa 104    = wceq 1397    e. wcel 2202   <.cop 3672   ` cfv 5326  (class class class)co 6017   0cc0 8031    + caddc 8034    - cmin 8349   ...cfz 10242  ♯chash 11036  Word cword 11112   ++ cconcat 11166   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-concat 11167  df-substr 11226  df-pfx 11253
This theorem is referenced by: (None)
  Copyright terms: Public domain W3C validator