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Theorem phtpcer 22026
Description: Path homotopy is an equivalence relation. Proposition 1.2 of [Hatcher] p. 26. (Contributed by Jeff Madsen, 2-Sep-2009.) (Revised by Mario Carneiro, 6-Jul-2015.)
Assertion
Ref Expression
phtpcer  |-  (  ~=ph  `  J )  Er  (
II  Cn  J )

Proof of Theorem phtpcer
Dummy variables  f 
g  u  v  x  y  z are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 phtpcrel 22024 . . . 4  |-  Rel  (  ~=ph  `  J )
21a1i 11 . . 3  |-  ( T. 
->  Rel  (  ~=ph  `  J
) )
3 isphtpc 22025 . . . . . 6  |-  ( x (  ~=ph  `  J ) y  <->  ( x  e.  ( II  Cn  J
)  /\  y  e.  ( II  Cn  J
)  /\  ( x
( PHtpy `  J )
y )  =/=  (/) ) )
43simp2bi 1024 . . . . 5  |-  ( x (  ~=ph  `  J ) y  ->  y  e.  ( II  Cn  J
) )
53simp1bi 1023 . . . . 5  |-  ( x (  ~=ph  `  J ) y  ->  x  e.  ( II  Cn  J
) )
63simp3bi 1025 . . . . . . 7  |-  ( x (  ~=ph  `  J ) y  ->  ( x
( PHtpy `  J )
y )  =/=  (/) )
7 n0 3741 . . . . . . 7  |-  ( ( x ( PHtpy `  J
) y )  =/=  (/) 
<->  E. f  f  e.  ( x ( PHtpy `  J ) y ) )
86, 7sylib 200 . . . . . 6  |-  ( x (  ~=ph  `  J ) y  ->  E. f 
f  e.  ( x ( PHtpy `  J )
y ) )
95adantr 467 . . . . . . . 8  |-  ( ( x (  ~=ph  `  J
) y  /\  f  e.  ( x ( PHtpy `  J ) y ) )  ->  x  e.  ( II  Cn  J
) )
104adantr 467 . . . . . . . 8  |-  ( ( x (  ~=ph  `  J
) y  /\  f  e.  ( x ( PHtpy `  J ) y ) )  ->  y  e.  ( II  Cn  J
) )
11 eqid 2451 . . . . . . . 8  |-  ( u  e.  ( 0 [,] 1 ) ,  v  e.  ( 0 [,] 1 )  |->  ( u f ( 1  -  v ) ) )  =  ( u  e.  ( 0 [,] 1
) ,  v  e.  ( 0 [,] 1
)  |->  ( u f ( 1  -  v
) ) )
12 simpr 463 . . . . . . . 8  |-  ( ( x (  ~=ph  `  J
) y  /\  f  e.  ( x ( PHtpy `  J ) y ) )  ->  f  e.  ( x ( PHtpy `  J ) y ) )
139, 10, 11, 12phtpycom 22019 . . . . . . 7  |-  ( ( x (  ~=ph  `  J
) y  /\  f  e.  ( x ( PHtpy `  J ) y ) )  ->  ( u  e.  ( 0 [,] 1
) ,  v  e.  ( 0 [,] 1
)  |->  ( u f ( 1  -  v
) ) )  e.  ( y ( PHtpy `  J ) x ) )
14 ne0i 3737 . . . . . . 7  |-  ( ( u  e.  ( 0 [,] 1 ) ,  v  e.  ( 0 [,] 1 )  |->  ( u f ( 1  -  v ) ) )  e.  ( y ( PHtpy `  J )
x )  ->  (
y ( PHtpy `  J
) x )  =/=  (/) )
1513, 14syl 17 . . . . . 6  |-  ( ( x (  ~=ph  `  J
) y  /\  f  e.  ( x ( PHtpy `  J ) y ) )  ->  ( y
( PHtpy `  J )
x )  =/=  (/) )
168, 15exlimddv 1781 . . . . 5  |-  ( x (  ~=ph  `  J ) y  ->  ( y
( PHtpy `  J )
x )  =/=  (/) )
17 isphtpc 22025 . . . . 5  |-  ( y (  ~=ph  `  J ) x  <->  ( y  e.  ( II  Cn  J
)  /\  x  e.  ( II  Cn  J
)  /\  ( y
( PHtpy `  J )
x )  =/=  (/) ) )
184, 5, 16, 17syl3anbrc 1192 . . . 4  |-  ( x (  ~=ph  `  J ) y  ->  y (  ~=ph  `  J ) x )
1918adantl 468 . . 3  |-  ( ( T.  /\  x ( 
~=ph  `  J ) y )  ->  y (  ~=ph  `  J ) x )
205adantr 467 . . . . 5  |-  ( ( x (  ~=ph  `  J
) y  /\  y
(  ~=ph  `  J )
z )  ->  x  e.  ( II  Cn  J
) )
21 simpr 463 . . . . . . 7  |-  ( ( x (  ~=ph  `  J
) y  /\  y
(  ~=ph  `  J )
z )  ->  y
(  ~=ph  `  J )
z )
22 isphtpc 22025 . . . . . . 7  |-  ( y (  ~=ph  `  J ) z  <->  ( y  e.  ( II  Cn  J
)  /\  z  e.  ( II  Cn  J
)  /\  ( y
( PHtpy `  J )
z )  =/=  (/) ) )
2321, 22sylib 200 . . . . . 6  |-  ( ( x (  ~=ph  `  J
) y  /\  y
(  ~=ph  `  J )
z )  ->  (
y  e.  ( II 
Cn  J )  /\  z  e.  ( II  Cn  J )  /\  (
y ( PHtpy `  J
) z )  =/=  (/) ) )
2423simp2d 1021 . . . . 5  |-  ( ( x (  ~=ph  `  J
) y  /\  y
(  ~=ph  `  J )
z )  ->  z  e.  ( II  Cn  J
) )
256adantr 467 . . . . . . . 8  |-  ( ( x (  ~=ph  `  J
) y  /\  y
(  ~=ph  `  J )
z )  ->  (
x ( PHtpy `  J
) y )  =/=  (/) )
2625, 7sylib 200 . . . . . . 7  |-  ( ( x (  ~=ph  `  J
) y  /\  y
(  ~=ph  `  J )
z )  ->  E. f 
f  e.  ( x ( PHtpy `  J )
y ) )
2723simp3d 1022 . . . . . . . 8  |-  ( ( x (  ~=ph  `  J
) y  /\  y
(  ~=ph  `  J )
z )  ->  (
y ( PHtpy `  J
) z )  =/=  (/) )
28 n0 3741 . . . . . . . 8  |-  ( ( y ( PHtpy `  J
) z )  =/=  (/) 
<->  E. g  g  e.  ( y ( PHtpy `  J ) z ) )
2927, 28sylib 200 . . . . . . 7  |-  ( ( x (  ~=ph  `  J
) y  /\  y
(  ~=ph  `  J )
z )  ->  E. g 
g  e.  ( y ( PHtpy `  J )
z ) )
30 eeanv 2078 . . . . . . 7  |-  ( E. f E. g ( f  e.  ( x ( PHtpy `  J )
y )  /\  g  e.  ( y ( PHtpy `  J ) z ) )  <->  ( E. f 
f  e.  ( x ( PHtpy `  J )
y )  /\  E. g  g  e.  (
y ( PHtpy `  J
) z ) ) )
3126, 29, 30sylanbrc 670 . . . . . 6  |-  ( ( x (  ~=ph  `  J
) y  /\  y
(  ~=ph  `  J )
z )  ->  E. f E. g ( f  e.  ( x ( PHtpy `  J ) y )  /\  g  e.  ( y ( PHtpy `  J
) z ) ) )
32 eqid 2451 . . . . . . . . . 10  |-  ( u  e.  ( 0 [,] 1 ) ,  v  e.  ( 0 [,] 1 )  |->  if ( v  <_  ( 1  /  2 ) ,  ( u f ( 2  x.  v ) ) ,  ( u g ( ( 2  x.  v )  - 
1 ) ) ) )  =  ( u  e.  ( 0 [,] 1 ) ,  v  e.  ( 0 [,] 1 )  |->  if ( v  <_  ( 1  /  2 ) ,  ( u f ( 2  x.  v ) ) ,  ( u g ( ( 2  x.  v )  - 
1 ) ) ) )
3320adantr 467 . . . . . . . . . 10  |-  ( ( ( x (  ~=ph  `  J ) y  /\  y (  ~=ph  `  J
) z )  /\  ( f  e.  ( x ( PHtpy `  J
) y )  /\  g  e.  ( y
( PHtpy `  J )
z ) ) )  ->  x  e.  ( II  Cn  J ) )
3423simp1d 1020 . . . . . . . . . . 11  |-  ( ( x (  ~=ph  `  J
) y  /\  y
(  ~=ph  `  J )
z )  ->  y  e.  ( II  Cn  J
) )
3534adantr 467 . . . . . . . . . 10  |-  ( ( ( x (  ~=ph  `  J ) y  /\  y (  ~=ph  `  J
) z )  /\  ( f  e.  ( x ( PHtpy `  J
) y )  /\  g  e.  ( y
( PHtpy `  J )
z ) ) )  ->  y  e.  ( II  Cn  J ) )
3624adantr 467 . . . . . . . . . 10  |-  ( ( ( x (  ~=ph  `  J ) y  /\  y (  ~=ph  `  J
) z )  /\  ( f  e.  ( x ( PHtpy `  J
) y )  /\  g  e.  ( y
( PHtpy `  J )
z ) ) )  ->  z  e.  ( II  Cn  J ) )
37 simprl 764 . . . . . . . . . 10  |-  ( ( ( x (  ~=ph  `  J ) y  /\  y (  ~=ph  `  J
) z )  /\  ( f  e.  ( x ( PHtpy `  J
) y )  /\  g  e.  ( y
( PHtpy `  J )
z ) ) )  ->  f  e.  ( x ( PHtpy `  J
) y ) )
38 simprr 766 . . . . . . . . . 10  |-  ( ( ( x (  ~=ph  `  J ) y  /\  y (  ~=ph  `  J
) z )  /\  ( f  e.  ( x ( PHtpy `  J
) y )  /\  g  e.  ( y
( PHtpy `  J )
z ) ) )  ->  g  e.  ( y ( PHtpy `  J
) z ) )
3932, 33, 35, 36, 37, 38phtpycc 22022 . . . . . . . . 9  |-  ( ( ( x (  ~=ph  `  J ) y  /\  y (  ~=ph  `  J
) z )  /\  ( f  e.  ( x ( PHtpy `  J
) y )  /\  g  e.  ( y
( PHtpy `  J )
z ) ) )  ->  ( u  e.  ( 0 [,] 1
) ,  v  e.  ( 0 [,] 1
)  |->  if ( v  <_  ( 1  / 
2 ) ,  ( u f ( 2  x.  v ) ) ,  ( u g ( ( 2  x.  v )  -  1 ) ) ) )  e.  ( x (
PHtpy `  J ) z ) )
40 ne0i 3737 . . . . . . . . 9  |-  ( ( u  e.  ( 0 [,] 1 ) ,  v  e.  ( 0 [,] 1 )  |->  if ( v  <_  (
1  /  2 ) ,  ( u f ( 2  x.  v
) ) ,  ( u g ( ( 2  x.  v )  -  1 ) ) ) )  e.  ( x ( PHtpy `  J
) z )  -> 
( x ( PHtpy `  J ) z )  =/=  (/) )
4139, 40syl 17 . . . . . . . 8  |-  ( ( ( x (  ~=ph  `  J ) y  /\  y (  ~=ph  `  J
) z )  /\  ( f  e.  ( x ( PHtpy `  J
) y )  /\  g  e.  ( y
( PHtpy `  J )
z ) ) )  ->  ( x (
PHtpy `  J ) z )  =/=  (/) )
4241ex 436 . . . . . . 7  |-  ( ( x (  ~=ph  `  J
) y  /\  y
(  ~=ph  `  J )
z )  ->  (
( f  e.  ( x ( PHtpy `  J
) y )  /\  g  e.  ( y
( PHtpy `  J )
z ) )  -> 
( x ( PHtpy `  J ) z )  =/=  (/) ) )
4342exlimdvv 1780 . . . . . 6  |-  ( ( x (  ~=ph  `  J
) y  /\  y
(  ~=ph  `  J )
z )  ->  ( E. f E. g ( f  e.  ( x ( PHtpy `  J )
y )  /\  g  e.  ( y ( PHtpy `  J ) z ) )  ->  ( x
( PHtpy `  J )
z )  =/=  (/) ) )
4431, 43mpd 15 . . . . 5  |-  ( ( x (  ~=ph  `  J
) y  /\  y
(  ~=ph  `  J )
z )  ->  (
x ( PHtpy `  J
) z )  =/=  (/) )
45 isphtpc 22025 . . . . 5  |-  ( x (  ~=ph  `  J ) z  <->  ( x  e.  ( II  Cn  J
)  /\  z  e.  ( II  Cn  J
)  /\  ( x
( PHtpy `  J )
z )  =/=  (/) ) )
4620, 24, 44, 45syl3anbrc 1192 . . . 4  |-  ( ( x (  ~=ph  `  J
) y  /\  y
(  ~=ph  `  J )
z )  ->  x
(  ~=ph  `  J )
z )
4746adantl 468 . . 3  |-  ( ( T.  /\  ( x (  ~=ph  `  J ) y  /\  y ( 
~=ph  `  J ) z ) )  ->  x
(  ~=ph  `  J )
z )
48 eqid 2451 . . . . . . . . . 10  |-  ( y  e.  ( 0 [,] 1 ) ,  z  e.  ( 0 [,] 1 )  |->  ( x `
 y ) )  =  ( y  e.  ( 0 [,] 1
) ,  z  e.  ( 0 [,] 1
)  |->  ( x `  y ) )
49 id 22 . . . . . . . . . 10  |-  ( x  e.  ( II  Cn  J )  ->  x  e.  ( II  Cn  J
) )
5048, 49phtpyid 22020 . . . . . . . . 9  |-  ( x  e.  ( II  Cn  J )  ->  (
y  e.  ( 0 [,] 1 ) ,  z  e.  ( 0 [,] 1 )  |->  ( x `  y ) )  e.  ( x ( PHtpy `  J )
x ) )
51 ne0i 3737 . . . . . . . . 9  |-  ( ( y  e.  ( 0 [,] 1 ) ,  z  e.  ( 0 [,] 1 )  |->  ( x `  y ) )  e.  ( x ( PHtpy `  J )
x )  ->  (
x ( PHtpy `  J
) x )  =/=  (/) )
5250, 51syl 17 . . . . . . . 8  |-  ( x  e.  ( II  Cn  J )  ->  (
x ( PHtpy `  J
) x )  =/=  (/) )
5352ancli 554 . . . . . . 7  |-  ( x  e.  ( II  Cn  J )  ->  (
x  e.  ( II 
Cn  J )  /\  ( x ( PHtpy `  J ) x )  =/=  (/) ) )
5453pm4.71ri 639 . . . . . 6  |-  ( x  e.  ( II  Cn  J )  <->  ( (
x  e.  ( II 
Cn  J )  /\  ( x ( PHtpy `  J ) x )  =/=  (/) )  /\  x  e.  ( II  Cn  J
) ) )
55 df-3an 987 . . . . . 6  |-  ( ( x  e.  ( II 
Cn  J )  /\  ( x ( PHtpy `  J ) x )  =/=  (/)  /\  x  e.  ( II  Cn  J
) )  <->  ( (
x  e.  ( II 
Cn  J )  /\  ( x ( PHtpy `  J ) x )  =/=  (/) )  /\  x  e.  ( II  Cn  J
) ) )
56 3ancomb 994 . . . . . 6  |-  ( ( x  e.  ( II 
Cn  J )  /\  ( x ( PHtpy `  J ) x )  =/=  (/)  /\  x  e.  ( II  Cn  J
) )  <->  ( x  e.  ( II  Cn  J
)  /\  x  e.  ( II  Cn  J
)  /\  ( x
( PHtpy `  J )
x )  =/=  (/) ) )
5754, 55, 563bitr2i 277 . . . . 5  |-  ( x  e.  ( II  Cn  J )  <->  ( x  e.  ( II  Cn  J
)  /\  x  e.  ( II  Cn  J
)  /\  ( x
( PHtpy `  J )
x )  =/=  (/) ) )
58 isphtpc 22025 . . . . 5  |-  ( x (  ~=ph  `  J ) x  <->  ( x  e.  ( II  Cn  J
)  /\  x  e.  ( II  Cn  J
)  /\  ( x
( PHtpy `  J )
x )  =/=  (/) ) )
5957, 58bitr4i 256 . . . 4  |-  ( x  e.  ( II  Cn  J )  <->  x (  ~=ph  `  J ) x )
6059a1i 11 . . 3  |-  ( T. 
->  ( x  e.  ( II  Cn  J )  <-> 
x (  ~=ph  `  J
) x ) )
612, 19, 47, 60iserd 7389 . 2  |-  ( T. 
->  (  ~=ph  `  J
)  Er  ( II 
Cn  J ) )
6261trud 1453 1  |-  (  ~=ph  `  J )  Er  (
II  Cn  J )
Colors of variables: wff setvar class
Syntax hints:    <-> wb 188    /\ wa 371    /\ w3a 985   T. wtru 1445   E.wex 1663    e. wcel 1887    =/= wne 2622   (/)c0 3731   ifcif 3881   class class class wbr 4402   Rel wrel 4839   ` cfv 5582  (class class class)co 6290    |-> cmpt2 6292    Er wer 7360   0cc0 9539   1c1 9540    x. cmul 9544    <_ cle 9676    - cmin 9860    / cdiv 10269   2c2 10659   [,]cicc 11638    Cn ccn 20240   IIcii 21907   PHtpycphtpy 21999    ~=ph cphtpc 22000
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1669  ax-4 1682  ax-5 1758  ax-6 1805  ax-7 1851  ax-8 1889  ax-9 1896  ax-10 1915  ax-11 1920  ax-12 1933  ax-13 2091  ax-ext 2431  ax-rep 4515  ax-sep 4525  ax-nul 4534  ax-pow 4581  ax-pr 4639  ax-un 6583  ax-inf2 8146  ax-cnex 9595  ax-resscn 9596  ax-1cn 9597  ax-icn 9598  ax-addcl 9599  ax-addrcl 9600  ax-mulcl 9601  ax-mulrcl 9602  ax-mulcom 9603  ax-addass 9604  ax-mulass 9605  ax-distr 9606  ax-i2m1 9607  ax-1ne0 9608  ax-1rid 9609  ax-rnegex 9610  ax-rrecex 9611  ax-cnre 9612  ax-pre-lttri 9613  ax-pre-lttrn 9614  ax-pre-ltadd 9615  ax-pre-mulgt0 9616  ax-pre-sup 9617  ax-mulf 9619
This theorem depends on definitions:  df-bi 189  df-or 372  df-an 373  df-3or 986  df-3an 987  df-tru 1447  df-ex 1664  df-nf 1668  df-sb 1798  df-eu 2303  df-mo 2304  df-clab 2438  df-cleq 2444  df-clel 2447  df-nfc 2581  df-ne 2624  df-nel 2625  df-ral 2742  df-rex 2743  df-reu 2744  df-rmo 2745  df-rab 2746  df-v 3047  df-sbc 3268  df-csb 3364  df-dif 3407  df-un 3409  df-in 3411  df-ss 3418  df-pss 3420  df-nul 3732  df-if 3882  df-pw 3953  df-sn 3969  df-pr 3971  df-tp 3973  df-op 3975  df-uni 4199  df-int 4235  df-iun 4280  df-iin 4281  df-br 4403  df-opab 4462  df-mpt 4463  df-tr 4498  df-eprel 4745  df-id 4749  df-po 4755  df-so 4756  df-fr 4793  df-se 4794  df-we 4795  df-xp 4840  df-rel 4841  df-cnv 4842  df-co 4843  df-dm 4844  df-rn 4845  df-res 4846  df-ima 4847  df-pred 5380  df-ord 5426  df-on 5427  df-lim 5428  df-suc 5429  df-iota 5546  df-fun 5584  df-fn 5585  df-f 5586  df-f1 5587  df-fo 5588  df-f1o 5589  df-fv 5590  df-isom 5591  df-riota 6252  df-ov 6293  df-oprab 6294  df-mpt2 6295  df-of 6531  df-om 6693  df-1st 6793  df-2nd 6794  df-supp 6915  df-wrecs 7028  df-recs 7090  df-rdg 7128  df-1o 7182  df-2o 7183  df-oadd 7186  df-er 7363  df-map 7474  df-ixp 7523  df-en 7570  df-dom 7571  df-sdom 7572  df-fin 7573  df-fsupp 7884  df-fi 7925  df-sup 7956  df-inf 7957  df-oi 8025  df-card 8373  df-cda 8598  df-pnf 9677  df-mnf 9678  df-xr 9679  df-ltxr 9680  df-le 9681  df-sub 9862  df-neg 9863  df-div 10270  df-nn 10610  df-2 10668  df-3 10669  df-4 10670  df-5 10671  df-6 10672  df-7 10673  df-8 10674  df-9 10675  df-10 10676  df-n0 10870  df-z 10938  df-dec 11052  df-uz 11160  df-q 11265  df-rp 11303  df-xneg 11409  df-xadd 11410  df-xmul 11411  df-ioo 11639  df-icc 11642  df-fz 11785  df-fzo 11916  df-seq 12214  df-exp 12273  df-hash 12516  df-cj 13162  df-re 13163  df-im 13164  df-sqrt 13298  df-abs 13299  df-struct 15123  df-ndx 15124  df-slot 15125  df-base 15126  df-sets 15127  df-ress 15128  df-plusg 15203  df-mulr 15204  df-starv 15205  df-sca 15206  df-vsca 15207  df-ip 15208  df-tset 15209  df-ple 15210  df-ds 15212  df-unif 15213  df-hom 15214  df-cco 15215  df-rest 15321  df-topn 15322  df-0g 15340  df-gsum 15341  df-topgen 15342  df-pt 15343  df-prds 15346  df-xrs 15400  df-qtop 15406  df-imas 15407  df-xps 15410  df-mre 15492  df-mrc 15493  df-acs 15495  df-mgm 16488  df-sgrp 16527  df-mnd 16537  df-submnd 16583  df-mulg 16676  df-cntz 16971  df-cmn 17432  df-psmet 18962  df-xmet 18963  df-met 18964  df-bl 18965  df-mopn 18966  df-cnfld 18971  df-top 19921  df-bases 19922  df-topon 19923  df-topsp 19924  df-cld 20034  df-cn 20243  df-cnp 20244  df-tx 20577  df-hmeo 20770  df-xms 21335  df-ms 21336  df-tms 21337  df-ii 21909  df-htpy 22001  df-phtpy 22002  df-phtpc 22023
This theorem is referenced by:  pcophtb  22060  pi1buni  22071  pi1addf  22078  pi1addval  22079  pi1grplem  22080  pi1inv  22083  pi1xfrf  22084  pi1xfr  22086  pi1xfrcnvlem  22087  pi1cof  22090  sconpi1  29962
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