Theorem cnclima 12173

Description: A closed subset of the codomain of a continuous function has a closed preimage. (Contributed by NM, 15-Mar-2007.) (Revised by Mario Carneiro, 21-Aug-2015.)

Assertion

Ref	Expression
cnclima	|- ( ( F e. ( J Cn K ) /\ A e. ( Clsd ` K ) ) -> ( `' F " A ) e. ( Clsd ` J ) )

Proof of Theorem cnclima

Step	Hyp	Ref	Expression
1		eqid 2100	. . . . . 6 |- U. J = U. J
2		eqid 2100	. . . . . 6 |- U. K = U. K
3	1, 2	cnf 12154	. . . . 5 |- ( F e. ( J Cn K ) -> F : U. J --> U. K )
4	3	adantr 272	. . . 4 |- ( ( F e. ( J Cn K ) /\ A e. ( Clsd ` K ) ) -> F : U. J --> U. K )
5		ffun 5211	. . . . . 6 |- ( F : U. J --> U. K -> Fun F )
6		funcnvcnv 5118	. . . . . 6 |- ( Fun F -> Fun `' `' F )
7		imadif 5139	. . . . . 6 |- ( Fun `' `' F -> ( `' F " ( U. K \ A ) ) = ( ( `' F " U. K ) \ ( `' F " A ) ) )
8	5, 6, 7	3syl 17	. . . . 5 |- ( F : U. J --> U. K -> ( `' F " ( U. K \ A ) ) = ( ( `' F " U. K ) \ ( `' F " A ) ) )
9		fimacnv 5481	. . . . . 6 |- ( F : U. J --> U. K -> ( `' F " U. K ) = U. J )
10	9	difeq1d 3140	. . . . 5 |- ( F : U. J --> U. K -> ( ( `' F " U. K ) \ ( `' F " A ) ) = ( U. J \ ( `' F " A ) ) )
11	8, 10	eqtr2d 2133	. . . 4 |- ( F : U. J --> U. K -> ( U. J \ ( `' F " A ) ) = ( `' F " ( U. K \ A ) ) )
12	4, 11	syl 14	. . 3 |- ( ( F e. ( J Cn K ) /\ A e. ( Clsd ` K ) ) -> ( U. J \ ( `' F " A ) ) = ( `' F " ( U. K \ A ) ) )
13	2	cldopn 12058	. . . 4 |- ( A e. ( Clsd ` K ) -> ( U. K \ A ) e. K )
14		cnima 12170	. . . 4 |- ( ( F e. ( J Cn K ) /\ ( U. K \ A ) e. K ) -> ( `' F " ( U. K \ A ) ) e. J )
15	13, 14	sylan2 282	. . 3 |- ( ( F e. ( J Cn K ) /\ A e. ( Clsd ` K ) ) -> ( `' F " ( U. K \ A ) ) e. J )
16	12, 15	eqeltrd 2176	. 2 |- ( ( F e. ( J Cn K ) /\ A e. ( Clsd ` K ) ) -> ( U. J \ ( `' F " A ) ) e. J )
17		cntop1 12151	. . . 4 |- ( F e. ( J Cn K ) -> J e. Top )
18	17	adantr 272	. . 3 |- ( ( F e. ( J Cn K ) /\ A e. ( Clsd ` K ) ) -> J e. Top )
19		cnvimass 4838	. . . 4 |- ( `' F " A ) C_ dom F
20	19, 4	fssdm 5223	. . 3 |- ( ( F e. ( J Cn K ) /\ A e. ( Clsd ` K ) ) -> ( `' F " A ) C_ U. J )
21	1	iscld2 12055	. . 3 |- ( ( J e. Top /\ ( `' F " A ) C_ U. J ) -> ( ( `' F " A ) e. ( Clsd ` J ) <-> ( U. J \ ( `' F " A ) ) e. J ) )
22	18, 20, 21	syl2anc 406	. 2 |- ( ( F e. ( J Cn K ) /\ A e. ( Clsd ` K ) ) -> ( ( `' F " A ) e. ( Clsd ` J ) <-> ( U. J \ ( `' F " A ) ) e. J ) )
23	16, 22	mpbird 166	1 |- ( ( F e. ( J Cn K ) /\ A e. ( Clsd ` K ) ) -> ( `' F " A ) e. ( Clsd ` J ) )

Syntax hints:   -> wi 4   /\ wa 103   <-> wb 104   = wceq 1299   e. wcel 1448   \ cdif 3018   C_ wss 3021   U.cuni 3683   `'ccnv 4476   "cima 4480   Fun wfun 5053   -->wf 5055   ` cfv 5059  (class class class)co 5706   Topctop 11946   Clsdccld 12043   Cn ccn 12136

This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-in1 584  ax-in2 585  ax-io 671  ax-5 1391  ax-7 1392  ax-gen 1393  ax-ie1 1437  ax-ie2 1438  ax-8 1450  ax-10 1451  ax-11 1452  ax-i12 1453  ax-bndl 1454  ax-4 1455  ax-13 1459  ax-14 1460  ax-17 1474  ax-i9 1478  ax-ial 1482  ax-i5r 1483  ax-ext 2082  ax-sep 3986  ax-pow 4038  ax-pr 4069  ax-un 4293  ax-setind 4390

This theorem depends on definitions:  df-bi 116  df-3an 932  df-tru 1302  df-fal 1305  df-nf 1405  df-sb 1704  df-eu 1963  df-mo 1964  df-clab 2087  df-cleq 2093  df-clel 2096  df-nfc 2229  df-ne 2268  df-ral 2380  df-rex 2381  df-rab 2384  df-v 2643  df-sbc 2863  df-csb 2956  df-dif 3023  df-un 3025  df-in 3027  df-ss 3034  df-pw 3459  df-sn 3480  df-pr 3481  df-op 3483  df-uni 3684  df-iun 3762  df-br 3876  df-opab 3930  df-mpt 3931  df-id 4153  df-xp 4483  df-rel 4484  df-cnv 4485  df-co 4486  df-dm 4487  df-rn 4488  df-res 4489  df-ima 4490  df-iota 5024  df-fun 5061  df-fn 5062  df-f 5063  df-fv 5067  df-ov 5709  df-oprab 5710  df-mpo 5711  df-1st 5969  df-2nd 5970  df-map 6474  df-top 11947  df-topon 11960  df-cld 12046  df-cn 12139

This theorem is referenced by: (None)