Theorem pcoval2 21279

Description: Evaluate the concatenation of two paths on the second half. (Contributed by Jeff Madsen, 15-Jun-2010.) (Proof shortened 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 ) )
pcoval2.4	|- ( ph -> ( F ` 1 ) = ( G ` 0 ) )

Assertion

Ref	Expression
pcoval2	|- ( ( ph /\ X e. ( ( 1 / 2 ) [,] 1 ) ) -> ( ( F ( *p ` J ) G ) ` X ) = ( G ` ( ( 2 x. X ) - 1 ) ) )

Proof of Theorem pcoval2

Step	Hyp	Ref	Expression
1		0re 9596	. . . . 5 |- 0 e. RR
2		1re 9595	. . . . 5 |- 1 e. RR
3		halfre 10754	. . . . . 6 |- ( 1 / 2 ) e. RR
4		halfgt0 10756	. . . . . 6 |- 0 < ( 1 / 2 )
5	1, 3, 4	ltleii 9707	. . . . 5 |- 0 <_ ( 1 / 2 )
6		1le1 10177	. . . . 5 |- 1 <_ 1
7		iccss 11592	. . . . 5 |- ( ( ( 0 e. RR /\ 1 e. RR ) /\ ( 0 <_ ( 1 / 2 ) /\ 1 <_ 1 ) ) -> ( ( 1 / 2 ) [,] 1 ) C_ ( 0 [,] 1 ) )
8	1, 2, 5, 6, 7	mp4an 673	. . . 4 |- ( ( 1 / 2 ) [,] 1 ) C_ ( 0 [,] 1 )
9	8	sseli 3500	. . 3 |- ( X e. ( ( 1 / 2 ) [,] 1 ) -> X e. ( 0 [,] 1 ) )
10		pcoval.2	. . . 4 |- ( ph -> F e. ( II Cn J ) )
11		pcoval.3	. . . 4 |- ( ph -> G e. ( II Cn J ) )
12	10, 11	pcovalg 21275	. . 3 |- ( ( ph /\ X e. ( 0 [,] 1 ) ) -> ( ( F ( *p ` J ) G ) ` X ) = if ( X <_ ( 1 / 2 ) , ( F ` ( 2 x. X ) ) , ( G ` ( ( 2 x. X ) - 1 ) ) ) )
13	9, 12	sylan2 474	. 2 |- ( ( ph /\ X e. ( ( 1 / 2 ) [,] 1 ) ) -> ( ( F ( *p ` J ) G ) ` X ) = if ( X <_ ( 1 / 2 ) , ( F ` ( 2 x. X ) ) , ( G ` ( ( 2 x. X ) - 1 ) ) ) )
14		pcoval2.4	. . . . . . . 8 |- ( ph -> ( F ` 1 ) = ( G ` 0 ) )
15	14	adantr 465	. . . . . . 7 |- ( ( ph /\ ( X e. ( ( 1 / 2 ) [,] 1 ) /\ X <_ ( 1 / 2 ) ) ) -> ( F ` 1 ) = ( G ` 0 ) )
16		simprr 756	. . . . . . . . . . 11 |- ( ( ph /\ ( X e. ( ( 1 / 2 ) [,] 1 ) /\ X <_ ( 1 / 2 ) ) ) -> X <_ ( 1 / 2 ) )
17	3, 2	elicc2i 11590	. . . . . . . . . . . . 13 |- ( X e. ( ( 1 / 2 ) [,] 1 ) <-> ( X e. RR /\ ( 1 / 2 ) <_ X /\ X <_ 1 ) )
18	17	simp2bi 1012	. . . . . . . . . . . 12 |- ( X e. ( ( 1 / 2 ) [,] 1 ) -> ( 1 / 2 ) <_ X )
19	18	ad2antrl 727	. . . . . . . . . . 11 |- ( ( ph /\ ( X e. ( ( 1 / 2 ) [,] 1 ) /\ X <_ ( 1 / 2 ) ) ) -> ( 1 / 2 ) <_ X )
20	17	simp1bi 1011	. . . . . . . . . . . . 13 |- ( X e. ( ( 1 / 2 ) [,] 1 ) -> X e. RR )
21	20	ad2antrl 727	. . . . . . . . . . . 12 |- ( ( ph /\ ( X e. ( ( 1 / 2 ) [,] 1 ) /\ X <_ ( 1 / 2 ) ) ) -> X e. RR )
22		letri3 9670	. . . . . . . . . . . 12 |- ( ( X e. RR /\ ( 1 / 2 ) e. RR ) -> ( X = ( 1 / 2 ) <-> ( X <_ ( 1 / 2 ) /\ ( 1 / 2 ) <_ X ) ) )
23	21, 3, 22	sylancl 662	. . . . . . . . . . 11 |- ( ( ph /\ ( X e. ( ( 1 / 2 ) [,] 1 ) /\ X <_ ( 1 / 2 ) ) ) -> ( X = ( 1 / 2 ) <-> ( X <_ ( 1 / 2 ) /\ ( 1 / 2 ) <_ X ) ) )
24	16, 19, 23	mpbir2and 920	. . . . . . . . . 10 |- ( ( ph /\ ( X e. ( ( 1 / 2 ) [,] 1 ) /\ X <_ ( 1 / 2 ) ) ) -> X = ( 1 / 2 ) )
25	24	oveq2d 6300	. . . . . . . . 9 |- ( ( ph /\ ( X e. ( ( 1 / 2 ) [,] 1 ) /\ X <_ ( 1 / 2 ) ) ) -> ( 2 x. X ) = ( 2 x. ( 1 / 2 ) ) )
26		2cn 10606	. . . . . . . . . 10 |- 2 e. CC
27		2ne0 10628	. . . . . . . . . 10 |- 2 =/= 0
28	26, 27	recidi 10275	. . . . . . . . 9 |- ( 2 x. ( 1 / 2 ) ) = 1
29	25, 28	syl6eq 2524	. . . . . . . 8 |- ( ( ph /\ ( X e. ( ( 1 / 2 ) [,] 1 ) /\ X <_ ( 1 / 2 ) ) ) -> ( 2 x. X ) = 1 )
30	29	fveq2d 5870	. . . . . . 7 |- ( ( ph /\ ( X e. ( ( 1 / 2 ) [,] 1 ) /\ X <_ ( 1 / 2 ) ) ) -> ( F ` ( 2 x. X ) ) = ( F ` 1 ) )
31	29	oveq1d 6299	. . . . . . . . 9 |- ( ( ph /\ ( X e. ( ( 1 / 2 ) [,] 1 ) /\ X <_ ( 1 / 2 ) ) ) -> ( ( 2 x. X ) - 1 ) = ( 1 - 1 ) )
32		1m1e0 10604	. . . . . . . . 9 |- ( 1 - 1 ) = 0
33	31, 32	syl6eq 2524	. . . . . . . 8 |- ( ( ph /\ ( X e. ( ( 1 / 2 ) [,] 1 ) /\ X <_ ( 1 / 2 ) ) ) -> ( ( 2 x. X ) - 1 ) = 0 )
34	33	fveq2d 5870	. . . . . . 7 |- ( ( ph /\ ( X e. ( ( 1 / 2 ) [,] 1 ) /\ X <_ ( 1 / 2 ) ) ) -> ( G ` ( ( 2 x. X ) - 1 ) ) = ( G ` 0 ) )
35	15, 30, 34	3eqtr4d 2518	. . . . . 6 |- ( ( ph /\ ( X e. ( ( 1 / 2 ) [,] 1 ) /\ X <_ ( 1 / 2 ) ) ) -> ( F ` ( 2 x. X ) ) = ( G ` ( ( 2 x. X ) - 1 ) ) )
36	35	ifeq1d 3957	. . . . 5 |- ( ( ph /\ ( X e. ( ( 1 / 2 ) [,] 1 ) /\ X <_ ( 1 / 2 ) ) ) -> if ( X <_ ( 1 / 2 ) , ( F ` ( 2 x. X ) ) , ( G ` ( ( 2 x. X ) - 1 ) ) ) = if ( X <_ ( 1 / 2 ) , ( G ` ( ( 2 x. X ) - 1 ) ) , ( G ` ( ( 2 x. X ) - 1 ) ) ) )
37		ifid 3976	. . . . 5 |- if ( X <_ ( 1 / 2 ) , ( G ` ( ( 2 x. X ) - 1 ) ) , ( G ` ( ( 2 x. X ) - 1 ) ) ) = ( G ` ( ( 2 x. X ) - 1 ) )
38	36, 37	syl6eq 2524	. . . 4 |- ( ( ph /\ ( X e. ( ( 1 / 2 ) [,] 1 ) /\ X <_ ( 1 / 2 ) ) ) -> if ( X <_ ( 1 / 2 ) , ( F ` ( 2 x. X ) ) , ( G ` ( ( 2 x. X ) - 1 ) ) ) = ( G ` ( ( 2 x. X ) - 1 ) ) )
39	38	expr 615	. . 3 |- ( ( ph /\ X e. ( ( 1 / 2 ) [,] 1 ) ) -> ( X <_ ( 1 / 2 ) -> if ( X <_ ( 1 / 2 ) , ( F ` ( 2 x. X ) ) , ( G ` ( ( 2 x. X ) - 1 ) ) ) = ( G ` ( ( 2 x. X ) - 1 ) ) ) )
40		iffalse 3948	. . 3 |- ( -. X <_ ( 1 / 2 ) -> if ( X <_ ( 1 / 2 ) , ( F ` ( 2 x. X ) ) , ( G ` ( ( 2 x. X ) - 1 ) ) ) = ( G ` ( ( 2 x. X ) - 1 ) ) )
41	39, 40	pm2.61d1 159	. 2 |- ( ( ph /\ X e. ( ( 1 / 2 ) [,] 1 ) ) -> if ( X <_ ( 1 / 2 ) , ( F ` ( 2 x. X ) ) , ( G ` ( ( 2 x. X ) - 1 ) ) ) = ( G ` ( ( 2 x. X ) - 1 ) ) )
42	13, 41	eqtrd 2508	1 |- ( ( ph /\ X e. ( ( 1 / 2 ) [,] 1 ) ) -> ( ( F ( *p ` J ) G ) ` X ) = ( G ` ( ( 2 x. X ) - 1 ) ) )

Syntax hints:   -> wi 4   <-> wb 184   /\ wa 369   = wceq 1379   e. wcel 1767   C_ wss 3476   ifcif 3939   class class class wbr 4447   ` cfv 5588  (class class class)co 6284   RRcr 9491   0cc0 9492   1c1 9493   x. cmul 9497   <_ cle 9629   - cmin 9805   / cdiv 10206   2c2 10585   [,]cicc 11532   Cn ccn 19519   IIcii 21142   *pcpco 21263

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1601  ax-4 1612  ax-5 1680  ax-6 1719  ax-7 1739  ax-8 1769  ax-9 1771  ax-10 1786  ax-11 1791  ax-12 1803  ax-13 1968  ax-ext 2445  ax-rep 4558  ax-sep 4568  ax-nul 4576  ax-pow 4625  ax-pr 4686  ax-un 6576  ax-cnex 9548  ax-resscn 9549  ax-1cn 9550  ax-icn 9551  ax-addcl 9552  ax-addrcl 9553  ax-mulcl 9554  ax-mulrcl 9555  ax-mulcom 9556  ax-addass 9557  ax-mulass 9558  ax-distr 9559  ax-i2m1 9560  ax-1ne0 9561  ax-1rid 9562  ax-rnegex 9563  ax-rrecex 9564  ax-cnre 9565  ax-pre-lttri 9566  ax-pre-lttrn 9567  ax-pre-ltadd 9568  ax-pre-mulgt0 9569

This theorem depends on definitions:  df-bi 185  df-or 370  df-an 371  df-3or 974  df-3an 975  df-tru 1382  df-ex 1597  df-nf 1600  df-sb 1712  df-eu 2279  df-mo 2280  df-clab 2453  df-cleq 2459  df-clel 2462  df-nfc 2617  df-ne 2664  df-nel 2665  df-ral 2819  df-rex 2820  df-reu 2821  df-rmo 2822  df-rab 2823  df-v 3115  df-sbc 3332  df-csb 3436  df-dif 3479  df-un 3481  df-in 3483  df-ss 3490  df-nul 3786  df-if 3940  df-pw 4012  df-sn 4028  df-pr 4030  df-op 4034  df-uni 4246  df-iun 4327  df-br 4448  df-opab 4506  df-mpt 4507  df-id 4795  df-po 4800  df-so 4801  df-xp 5005  df-rel 5006  df-cnv 5007  df-co 5008  df-dm 5009  df-rn 5010  df-res 5011  df-ima 5012  df-iota 5551  df-fun 5590  df-fn 5591  df-f 5592  df-f1 5593  df-fo 5594  df-f1o 5595  df-fv 5596  df-riota 6245  df-ov 6287  df-oprab 6288  df-mpt2 6289  df-1st 6784  df-2nd 6785  df-er 7311  df-map 7422  df-en 7517  df-dom 7518  df-sdom 7519  df-pnf 9630  df-mnf 9631  df-xr 9632  df-ltxr 9633  df-le 9634  df-sub 9807  df-neg 9808  df-div 10207  df-2 10594  df-icc 11536  df-top 19194  df-topon 19197  df-cn 19522  df-pco 21268

This theorem is referenced by:  pcoass  21287  pcorevlem  21289