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Theorem pcoval1 18995
Description: Evaluate the concatenation of two paths on the first half. (Contributed by Jeff Madsen, 15-Jun-2010.) (Revised by Mario Carneiro, 7-Jun-2014.)
Hypotheses
Ref Expression
pcoval.2  |-  ( ph  ->  F  e.  ( II 
Cn  J ) )
pcoval.3  |-  ( ph  ->  G  e.  ( II 
Cn  J ) )
Assertion
Ref Expression
pcoval1  |-  ( (
ph  /\  X  e.  ( 0 [,] (
1  /  2 ) ) )  ->  (
( F ( *p
`  J ) G ) `  X )  =  ( F `  ( 2  x.  X
) ) )

Proof of Theorem pcoval1
StepHypRef Expression
1 0re 9051 . . . . 5  |-  0  e.  RR
2 1re 9050 . . . . 5  |-  1  e.  RR
3 0le0 10041 . . . . 5  |-  0  <_  0
42rehalfcli 10176 . . . . . 6  |-  ( 1  /  2 )  e.  RR
5 halflt1 10149 . . . . . 6  |-  ( 1  /  2 )  <  1
64, 2, 5ltleii 9156 . . . . 5  |-  ( 1  /  2 )  <_ 
1
7 iccss 10938 . . . . 5  |-  ( ( ( 0  e.  RR  /\  1  e.  RR )  /\  ( 0  <_ 
0  /\  ( 1  /  2 )  <_ 
1 ) )  -> 
( 0 [,] (
1  /  2 ) )  C_  ( 0 [,] 1 ) )
81, 2, 3, 6, 7mp4an 655 . . . 4  |-  ( 0 [,] ( 1  / 
2 ) )  C_  ( 0 [,] 1
)
98sseli 3308 . . 3  |-  ( X  e.  ( 0 [,] ( 1  /  2
) )  ->  X  e.  ( 0 [,] 1
) )
10 pcoval.2 . . . 4  |-  ( ph  ->  F  e.  ( II 
Cn  J ) )
11 pcoval.3 . . . 4  |-  ( ph  ->  G  e.  ( II 
Cn  J ) )
1210, 11pcovalg 18994 . . 3  |-  ( (
ph  /\  X  e.  ( 0 [,] 1
) )  ->  (
( F ( *p
`  J ) G ) `  X )  =  if ( X  <_  ( 1  / 
2 ) ,  ( F `  ( 2  x.  X ) ) ,  ( G `  ( ( 2  x.  X )  -  1 ) ) ) )
139, 12sylan2 461 . 2  |-  ( (
ph  /\  X  e.  ( 0 [,] (
1  /  2 ) ) )  ->  (
( F ( *p
`  J ) G ) `  X )  =  if ( X  <_  ( 1  / 
2 ) ,  ( F `  ( 2  x.  X ) ) ,  ( G `  ( ( 2  x.  X )  -  1 ) ) ) )
14 elii1 18917 . . . . 5  |-  ( X  e.  ( 0 [,] ( 1  /  2
) )  <->  ( X  e.  ( 0 [,] 1
)  /\  X  <_  ( 1  /  2 ) ) )
1514simprbi 451 . . . 4  |-  ( X  e.  ( 0 [,] ( 1  /  2
) )  ->  X  <_  ( 1  /  2
) )
16 iftrue 3709 . . . 4  |-  ( X  <_  ( 1  / 
2 )  ->  if ( X  <_  ( 1  /  2 ) ,  ( F `  (
2  x.  X ) ) ,  ( G `
 ( ( 2  x.  X )  - 
1 ) ) )  =  ( F `  ( 2  x.  X
) ) )
1715, 16syl 16 . . 3  |-  ( X  e.  ( 0 [,] ( 1  /  2
) )  ->  if ( X  <_  ( 1  /  2 ) ,  ( F `  (
2  x.  X ) ) ,  ( G `
 ( ( 2  x.  X )  - 
1 ) ) )  =  ( F `  ( 2  x.  X
) ) )
1817adantl 453 . 2  |-  ( (
ph  /\  X  e.  ( 0 [,] (
1  /  2 ) ) )  ->  if ( X  <_  ( 1  /  2 ) ,  ( F `  (
2  x.  X ) ) ,  ( G `
 ( ( 2  x.  X )  - 
1 ) ) )  =  ( F `  ( 2  x.  X
) ) )
1913, 18eqtrd 2440 1  |-  ( (
ph  /\  X  e.  ( 0 [,] (
1  /  2 ) ) )  ->  (
( F ( *p
`  J ) G ) `  X )  =  ( F `  ( 2  x.  X
) ) )
Colors of variables: wff set class
Syntax hints:    -> wi 4    /\ wa 359    = wceq 1649    e. wcel 1721    C_ wss 3284   ifcif 3703   class class class wbr 4176   ` cfv 5417  (class class class)co 6044   RRcr 8949   0cc0 8950   1c1 8951    x. cmul 8955    <_ cle 9081    - cmin 9251    / cdiv 9637   2c2 10009   [,]cicc 10879    Cn ccn 17246   IIcii 18862   *pcpco 18982
This theorem is referenced by:  pco0  18996  pcoass  19006  pcorevlem  19008
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-3 7  ax-mp 8  ax-gen 1552  ax-5 1563  ax-17 1623  ax-9 1662  ax-8 1683  ax-13 1723  ax-14 1725  ax-6 1740  ax-7 1745  ax-11 1757  ax-12 1946  ax-ext 2389  ax-rep 4284  ax-sep 4294  ax-nul 4302  ax-pow 4341  ax-pr 4367  ax-un 4664  ax-cnex 9006  ax-resscn 9007  ax-1cn 9008  ax-icn 9009  ax-addcl 9010  ax-addrcl 9011  ax-mulcl 9012  ax-mulrcl 9013  ax-mulcom 9014  ax-addass 9015  ax-mulass 9016  ax-distr 9017  ax-i2m1 9018  ax-1ne0 9019  ax-1rid 9020  ax-rnegex 9021  ax-rrecex 9022  ax-cnre 9023  ax-pre-lttri 9024  ax-pre-lttrn 9025  ax-pre-ltadd 9026  ax-pre-mulgt0 9027
This theorem depends on definitions:  df-bi 178  df-or 360  df-an 361  df-3or 937  df-3an 938  df-tru 1325  df-ex 1548  df-nf 1551  df-sb 1656  df-eu 2262  df-mo 2263  df-clab 2395  df-cleq 2401  df-clel 2404  df-nfc 2533  df-ne 2573  df-nel 2574  df-ral 2675  df-rex 2676  df-reu 2677  df-rmo 2678  df-rab 2679  df-v 2922  df-sbc 3126  df-csb 3216  df-dif 3287  df-un 3289  df-in 3291  df-ss 3298  df-nul 3593  df-if 3704  df-pw 3765  df-sn 3784  df-pr 3785  df-op 3787  df-uni 3980  df-iun 4059  df-br 4177  df-opab 4231  df-mpt 4232  df-id 4462  df-po 4467  df-so 4468  df-xp 4847  df-rel 4848  df-cnv 4849  df-co 4850  df-dm 4851  df-rn 4852  df-res 4853  df-ima 4854  df-iota 5381  df-fun 5419  df-fn 5420  df-f 5421  df-f1 5422  df-fo 5423  df-f1o 5424  df-fv 5425  df-ov 6047  df-oprab 6048  df-mpt2 6049  df-1st 6312  df-2nd 6313  df-riota 6512  df-er 6868  df-map 6983  df-en 7073  df-dom 7074  df-sdom 7075  df-pnf 9082  df-mnf 9083  df-xr 9084  df-ltxr 9085  df-le 9086  df-sub 9253  df-neg 9254  df-div 9638  df-2 10018  df-icc 10883  df-top 16922  df-topon 16925  df-cn 17249  df-pco 18987
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