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Theorem tgpsubcn 20459
Description: In a topological group, the "subtraction" (or "division") is continuous. Axiom GT' of [BourbakiTop1] p. III.1 (Contributed by FL, 21-Jun-2010.) (Revised by Mario Carneiro, 19-Mar-2015.)
Hypotheses
Ref Expression
tgpsubcn.2  |-  J  =  ( TopOpen `  G )
tgpsubcn.3  |-  .-  =  ( -g `  G )
Assertion
Ref Expression
tgpsubcn  |-  ( G  e.  TopGrp  ->  .-  e.  (
( J  tX  J
)  Cn  J ) )

Proof of Theorem tgpsubcn
Dummy variables  x  y are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 eqid 2441 . . 3  |-  ( Base `  G )  =  (
Base `  G )
2 eqid 2441 . . 3  |-  ( +g  `  G )  =  ( +g  `  G )
3 eqid 2441 . . 3  |-  ( invg `  G )  =  ( invg `  G )
4 tgpsubcn.3 . . 3  |-  .-  =  ( -g `  G )
51, 2, 3, 4grpsubfval 15963 . 2  |-  .-  =  ( x  e.  ( Base `  G ) ,  y  e.  ( Base `  G )  |->  ( x ( +g  `  G
) ( ( invg `  G ) `
 y ) ) )
6 tgpsubcn.2 . . 3  |-  J  =  ( TopOpen `  G )
7 tgptmd 20448 . . 3  |-  ( G  e.  TopGrp  ->  G  e. TopMnd )
86, 1tgptopon 20451 . . 3  |-  ( G  e.  TopGrp  ->  J  e.  (TopOn `  ( Base `  G
) ) )
98, 8cnmpt1st 20039 . . 3  |-  ( G  e.  TopGrp  ->  ( x  e.  ( Base `  G
) ,  y  e.  ( Base `  G
)  |->  x )  e.  ( ( J  tX  J )  Cn  J
) )
108, 8cnmpt2nd 20040 . . . 4  |-  ( G  e.  TopGrp  ->  ( x  e.  ( Base `  G
) ,  y  e.  ( Base `  G
)  |->  y )  e.  ( ( J  tX  J )  Cn  J
) )
116, 3tgpinv 20454 . . . 4  |-  ( G  e.  TopGrp  ->  ( invg `  G )  e.  ( J  Cn  J ) )
128, 8, 10, 11cnmpt21f 20043 . . 3  |-  ( G  e.  TopGrp  ->  ( x  e.  ( Base `  G
) ,  y  e.  ( Base `  G
)  |->  ( ( invg `  G ) `
 y ) )  e.  ( ( J 
tX  J )  Cn  J ) )
136, 2, 7, 8, 8, 9, 12cnmpt2plusg 20457 . 2  |-  ( G  e.  TopGrp  ->  ( x  e.  ( Base `  G
) ,  y  e.  ( Base `  G
)  |->  ( x ( +g  `  G ) ( ( invg `  G ) `  y
) ) )  e.  ( ( J  tX  J )  Cn  J
) )
145, 13syl5eqel 2533 1  |-  ( G  e.  TopGrp  ->  .-  e.  (
( J  tX  J
)  Cn  J ) )
Colors of variables: wff setvar class
Syntax hints:    -> wi 4    = wceq 1381    e. wcel 1802   ` cfv 5575  (class class class)co 6278    |-> cmpt2 6280   Basecbs 14506   +g cplusg 14571   TopOpenctopn 14693   invgcminusg 15925   -gcsg 15926    Cn ccn 19595    tX ctx 19931   TopGrpctgp 20440
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1603  ax-4 1616  ax-5 1689  ax-6 1732  ax-7 1774  ax-8 1804  ax-9 1806  ax-10 1821  ax-11 1826  ax-12 1838  ax-13 1983  ax-ext 2419  ax-rep 4545  ax-sep 4555  ax-nul 4563  ax-pow 4612  ax-pr 4673  ax-un 6574
This theorem depends on definitions:  df-bi 185  df-or 370  df-an 371  df-3an 974  df-tru 1384  df-ex 1598  df-nf 1602  df-sb 1725  df-eu 2270  df-mo 2271  df-clab 2427  df-cleq 2433  df-clel 2436  df-nfc 2591  df-ne 2638  df-ral 2796  df-rex 2797  df-reu 2798  df-rab 2800  df-v 3095  df-sbc 3312  df-csb 3419  df-dif 3462  df-un 3464  df-in 3466  df-ss 3473  df-nul 3769  df-if 3924  df-pw 3996  df-sn 4012  df-pr 4014  df-op 4018  df-uni 4232  df-iun 4314  df-br 4435  df-opab 4493  df-mpt 4494  df-id 4782  df-xp 4992  df-rel 4993  df-cnv 4994  df-co 4995  df-dm 4996  df-rn 4997  df-res 4998  df-ima 4999  df-iota 5538  df-fun 5577  df-fn 5578  df-f 5579  df-f1 5580  df-fo 5581  df-f1o 5582  df-fv 5583  df-ov 6281  df-oprab 6282  df-mpt2 6283  df-1st 6782  df-2nd 6783  df-map 7421  df-topgen 14715  df-plusf 15742  df-sbg 15930  df-top 19269  df-bases 19271  df-topon 19272  df-topsp 19273  df-cn 19598  df-tx 19933  df-tmd 20441  df-tgp 20442
This theorem is referenced by:  istgp2  20460  clssubg  20477  clsnsg  20478  tgphaus  20485  tgpt0  20487  qustgplem  20489
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