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

Theorem ccatlid 11352
Description: Concatenation of a word by the empty word on the left. (Contributed by Stefan O'Rear, 15-Aug-2015.) (Proof shortened by AV, 1-May-2020.)
Assertion
Ref Expression
ccatlid  |-  ( S  e. Word  B  ->  ( (/) ++  S )  =  S )

Proof of Theorem ccatlid
Dummy variable  x is distinct from all other variables.
StepHypRef Expression
1 wrd0 11307 . . . 4  |-  (/)  e. Word  B
2 ccatvalfn 11347 . . . 4  |-  ( (
(/)  e. Word  B  /\  S  e. Word  B )  ->  ( (/) ++  S )  Fn  (
0..^ ( ( `  (/) )  +  ( `  S )
) ) )
31, 2mpan 428 . . 3  |-  ( S  e. Word  B  ->  ( (/) ++  S )  Fn  (
0..^ ( ( `  (/) )  +  ( `  S )
) ) )
4 hash0 11213 . . . . . . . 8  |-  ( `  (/) )  =  0
54oveq1i 6085 . . . . . . 7  |-  ( ( `  (/) )  +  ( `  S ) )  =  ( 0  +  ( `  S ) )
6 lencl 11286 . . . . . . . . 9  |-  ( S  e. Word  B  ->  ( `  S )  e.  NN0 )
76nn0cnd 9601 . . . . . . . 8  |-  ( S  e. Word  B  ->  ( `  S )  e.  CC )
87addlidd 8466 . . . . . . 7  |-  ( S  e. Word  B  ->  (
0  +  ( `  S
) )  =  ( `  S ) )
95, 8eqtrid 2283 . . . . . 6  |-  ( S  e. Word  B  ->  (
( `  (/) )  +  ( `  S ) )  =  ( `  S )
)
109eqcomd 2244 . . . . 5  |-  ( S  e. Word  B  ->  ( `  S )  =  ( ( `  (/) )  +  ( `  S )
) )
1110oveq2d 6091 . . . 4  |-  ( S  e. Word  B  ->  (
0..^ ( `  S )
)  =  ( 0..^ ( ( `  (/) )  +  ( `  S )
) ) )
1211fneq2d 5467 . . 3  |-  ( S  e. Word  B  ->  (
( (/) ++  S )  Fn  ( 0..^ ( `  S
) )  <->  ( (/) ++  S )  Fn  ( 0..^ ( ( `  (/) )  +  ( `  S )
) ) ) )
133, 12mpbird 167 . 2  |-  ( S  e. Word  B  ->  ( (/) ++  S )  Fn  (
0..^ ( `  S )
) )
14 wrdfn 11297 . 2  |-  ( S  e. Word  B  ->  S  Fn  ( 0..^ ( `  S
) ) )
154a1i 9 . . . . . . 7  |-  ( S  e. Word  B  ->  ( `  (/) )  =  0
)
1615, 9oveq12d 6093 . . . . . 6  |-  ( S  e. Word  B  ->  (
( `  (/) )..^ ( ( `  (/) )  +  ( `  S ) ) )  =  ( 0..^ ( `  S ) ) )
1716eleq2d 2308 . . . . 5  |-  ( S  e. Word  B  ->  (
x  e.  ( ( `  (/) )..^ ( ( `  (/) )  +  ( `  S ) ) )  <-> 
x  e.  ( 0..^ ( `  S )
) ) )
1817biimpar 297 . . . 4  |-  ( ( S  e. Word  B  /\  x  e.  ( 0..^ ( `  S )
) )  ->  x  e.  ( ( `  (/) )..^ ( ( `  (/) )  +  ( `  S )
) ) )
19 ccatval2 11344 . . . . 5  |-  ( (
(/)  e. Word  B  /\  S  e. Word  B  /\  x  e.  ( ( `  (/) )..^ ( ( `  (/) )  +  ( `  S )
) ) )  -> 
( ( (/) ++  S ) `
 x )  =  ( S `  (
x  -  ( `  (/) ) ) ) )
201, 19mp3an1 1365 . . . 4  |-  ( ( S  e. Word  B  /\  x  e.  ( ( `  (/) )..^ ( ( `  (/) )  +  ( `  S )
) ) )  -> 
( ( (/) ++  S ) `
 x )  =  ( S `  (
x  -  ( `  (/) ) ) ) )
2118, 20syldan 282 . . 3  |-  ( ( S  e. Word  B  /\  x  e.  ( 0..^ ( `  S )
) )  ->  (
( (/) ++  S ) `  x )  =  ( S `  ( x  -  ( `  (/) ) ) ) )
224oveq2i 6086 . . . . 5  |-  ( x  -  ( `  (/) ) )  =  ( x  - 
0 )
23 elfzoelz 10532 . . . . . . . 8  |-  ( x  e.  ( 0..^ ( `  S ) )  ->  x  e.  ZZ )
2423adantl 277 . . . . . . 7  |-  ( ( S  e. Word  B  /\  x  e.  ( 0..^ ( `  S )
) )  ->  x  e.  ZZ )
2524zcnd 9748 . . . . . 6  |-  ( ( S  e. Word  B  /\  x  e.  ( 0..^ ( `  S )
) )  ->  x  e.  CC )
2625subid1d 8616 . . . . 5  |-  ( ( S  e. Word  B  /\  x  e.  ( 0..^ ( `  S )
) )  ->  (
x  -  0 )  =  x )
2722, 26eqtrid 2283 . . . 4  |-  ( ( S  e. Word  B  /\  x  e.  ( 0..^ ( `  S )
) )  ->  (
x  -  ( `  (/) ) )  =  x )
2827fveq2d 5694 . . 3  |-  ( ( S  e. Word  B  /\  x  e.  ( 0..^ ( `  S )
) )  ->  ( S `  ( x  -  ( `  (/) ) ) )  =  ( S `
 x ) )
2921, 28eqtrd 2271 . 2  |-  ( ( S  e. Word  B  /\  x  e.  ( 0..^ ( `  S )
) )  ->  (
( (/) ++  S ) `  x )  =  ( S `  x ) )
3013, 14, 29eqfnfvd 5800 1  |-  ( S  e. Word  B  ->  ( (/) ++  S )  =  S )
Colors of variables: wff set class
Syntax hints:    -> wi 4    /\ wa 104    = wceq 1402    e. wcel 2209   (/)c0 3520    Fn wfn 5367   ` cfv 5372  (class class class)co 6075   0cc0 8169    + caddc 8172    - cmin 8487   ZZcz 9623  ..^cfzo 10527  ♯chash 11192  Word cword 11282   ++ cconcat 11336
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 623  ax-in2 624  ax-io 721  ax-5 1500  ax-7 1501  ax-gen 1502  ax-ie1 1546  ax-ie2 1547  ax-8 1557  ax-10 1558  ax-11 1559  ax-i12 1560  ax-bndl 1562  ax-4 1563  ax-17 1579  ax-i9 1583  ax-ial 1587  ax-i5r 1588  ax-14 2212  ax-ext 2220  ax-coll 4241  ax-sep 4244  ax-nul 4254  ax-pow 4306  ax-pr 4341  ax-un 4573  ax-setind 4679  ax-iinf 4730  ax-cnex 8260  ax-resscn 8261  ax-1cn 8262  ax-1re 8263  ax-icn 8264  ax-addcl 8265  ax-addrcl 8266  ax-mulcl 8267  ax-addcom 8269  ax-addass 8271  ax-distr 8273  ax-i2m1 8274  ax-0lt1 8275  ax-0id 8277  ax-rnegex 8278  ax-cnre 8280  ax-pre-ltirr 8281  ax-pre-ltwlin 8282  ax-pre-lttrn 8283  ax-pre-apti 8284  ax-pre-ltadd 8285
This theorem depends on definitions:  df-bi 117  df-dc 847  df-3or 1010  df-3an 1011  df-tru 1405  df-fal 1408  df-nf 1514  df-sb 1816  df-eu 2089  df-mo 2090  df-clab 2225  df-cleq 2231  df-clel 2234  df-nfc 2381  df-ne 2421  df-nel 2516  df-ral 2533  df-rex 2534  df-reu 2535  df-rab 2537  df-v 2823  df-sbc 3052  df-csb 3148  df-dif 3222  df-un 3224  df-in 3226  df-ss 3233  df-nul 3521  df-if 3636  df-pw 3687  df-sn 3711  df-pr 3712  df-op 3714  df-uni 3931  df-int 3966  df-iun 4009  df-br 4126  df-opab 4188  df-mpt 4189  df-tr 4225  df-id 4433  df-iord 4506  df-on 4508  df-ilim 4509  df-suc 4511  df-iom 4733  df-xp 4775  df-rel 4776  df-cnv 4777  df-co 4778  df-dm 4779  df-rn 4780  df-res 4781  df-ima 4782  df-iota 5332  df-fun 5374  df-fn 5375  df-f 5376  df-f1 5377  df-fo 5378  df-f1o 5379  df-fv 5380  df-riota 6028  df-ov 6078  df-oprab 6079  df-mpo 6080  df-1st 6364  df-2nd 6365  df-recs 6566  df-frec 6652  df-1o 6677  df-er 6797  df-en 7013  df-dom 7014  df-fin 7015  df-pnf 8352  df-mnf 8353  df-xr 8354  df-ltxr 8355  df-le 8356  df-sub 8489  df-neg 8490  df-inn 9284  df-n0 9543  df-z 9624  df-uz 9901  df-fz 10391  df-fzo 10528  df-ihash 11193  df-word 11283  df-concat 11337
This theorem is referenced by:  ccatidid  11356  ccat1st1st  11387  swrdccat  11485  konigsberglem1  16643  konigsberglem2  16644  konigsberglem3  16645
  Copyright terms: Public domain W3C validator