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Theorem hmeoco 13031
Description: The composite of two homeomorphisms is a homeomorphism. (Contributed by FL, 9-Mar-2007.) (Proof shortened by Mario Carneiro, 23-Aug-2015.)
Assertion
Ref Expression
hmeoco  |-  ( ( F  e.  ( J
Homeo K )  /\  G  e.  ( K Homeo L ) )  ->  ( G  o.  F )  e.  ( J Homeo L ) )

Proof of Theorem hmeoco
StepHypRef Expression
1 hmeocn 13020 . . 3  |-  ( F  e.  ( J Homeo K )  ->  F  e.  ( J  Cn  K
) )
2 hmeocn 13020 . . 3  |-  ( G  e.  ( K Homeo L )  ->  G  e.  ( K  Cn  L
) )
3 cnco 12936 . . 3  |-  ( ( F  e.  ( J  Cn  K )  /\  G  e.  ( K  Cn  L ) )  -> 
( G  o.  F
)  e.  ( J  Cn  L ) )
41, 2, 3syl2an 287 . 2  |-  ( ( F  e.  ( J
Homeo K )  /\  G  e.  ( K Homeo L ) )  ->  ( G  o.  F )  e.  ( J  Cn  L ) )
5 cnvco 4794 . . 3  |-  `' ( G  o.  F )  =  ( `' F  o.  `' G )
6 hmeocnvcn 13021 . . . 4  |-  ( G  e.  ( K Homeo L )  ->  `' G  e.  ( L  Cn  K
) )
7 hmeocnvcn 13021 . . . 4  |-  ( F  e.  ( J Homeo K )  ->  `' F  e.  ( K  Cn  J
) )
8 cnco 12936 . . . 4  |-  ( ( `' G  e.  ( L  Cn  K )  /\  `' F  e.  ( K  Cn  J ) )  ->  ( `' F  o.  `' G )  e.  ( L  Cn  J ) )
96, 7, 8syl2anr 288 . . 3  |-  ( ( F  e.  ( J
Homeo K )  /\  G  e.  ( K Homeo L ) )  ->  ( `' F  o.  `' G
)  e.  ( L  Cn  J ) )
105, 9eqeltrid 2257 . 2  |-  ( ( F  e.  ( J
Homeo K )  /\  G  e.  ( K Homeo L ) )  ->  `' ( G  o.  F )  e.  ( L  Cn  J
) )
11 ishmeo 13019 . 2  |-  ( ( G  o.  F )  e.  ( J Homeo L )  <->  ( ( G  o.  F )  e.  ( J  Cn  L
)  /\  `' ( G  o.  F )  e.  ( L  Cn  J
) ) )
124, 10, 11sylanbrc 415 1  |-  ( ( F  e.  ( J
Homeo K )  /\  G  e.  ( K Homeo L ) )  ->  ( G  o.  F )  e.  ( J Homeo L ) )
Colors of variables: wff set class
Syntax hints:    -> wi 4    /\ wa 103    e. wcel 2141   `'ccnv 4608    o. ccom 4613  (class class class)co 5850    Cn ccn 12900   Homeochmeo 13015
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-in1 609  ax-in2 610  ax-io 704  ax-5 1440  ax-7 1441  ax-gen 1442  ax-ie1 1486  ax-ie2 1487  ax-8 1497  ax-10 1498  ax-11 1499  ax-i12 1500  ax-bndl 1502  ax-4 1503  ax-17 1519  ax-i9 1523  ax-ial 1527  ax-i5r 1528  ax-13 2143  ax-14 2144  ax-ext 2152  ax-sep 4105  ax-pow 4158  ax-pr 4192  ax-un 4416  ax-setind 4519
This theorem depends on definitions:  df-bi 116  df-3an 975  df-tru 1351  df-fal 1354  df-nf 1454  df-sb 1756  df-eu 2022  df-mo 2023  df-clab 2157  df-cleq 2163  df-clel 2166  df-nfc 2301  df-ne 2341  df-ral 2453  df-rex 2454  df-rab 2457  df-v 2732  df-sbc 2956  df-csb 3050  df-dif 3123  df-un 3125  df-in 3127  df-ss 3134  df-pw 3566  df-sn 3587  df-pr 3588  df-op 3590  df-uni 3795  df-iun 3873  df-br 3988  df-opab 4049  df-mpt 4050  df-id 4276  df-xp 4615  df-rel 4616  df-cnv 4617  df-co 4618  df-dm 4619  df-rn 4620  df-res 4621  df-ima 4622  df-iota 5158  df-fun 5198  df-fn 5199  df-f 5200  df-fv 5204  df-ov 5853  df-oprab 5854  df-mpo 5855  df-1st 6116  df-2nd 6117  df-map 6624  df-top 12711  df-topon 12724  df-cn 12903  df-hmeo 13016
This theorem is referenced by: (None)
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