Theorem cnntr 13996

Description: Continuity in terms of interior. (Contributed by Jeff Hankins, 2-Oct-2009.) (Proof shortened by Mario Carneiro, 25-Aug-2015.)

Assertion

Ref	Expression
cnntr	|- ( ( J e. (TopOn ` X ) /\ K e. (TopOn ` Y ) ) -> ( F e. ( J Cn K ) <-> ( F : X --> Y /\ A. x e. ~P Y ( `' F " ( ( int ` K ) ` x ) ) C_ ( ( int ` J ) ` ( `' F " x ) ) ) ) )

Distinct variable groups:   x, F   x, J   x, K   x, X   x, Y

Proof of Theorem cnntr

Step	Hyp	Ref	Expression
1		cnf2 13976	. . . 4 |- ( ( J e. (TopOn ` X ) /\ K e. (TopOn ` Y ) /\ F e. ( J Cn K ) ) -> F : X --> Y )
2	1	3expia 1206	. . 3 |- ( ( J e. (TopOn ` X ) /\ K e. (TopOn ` Y ) ) -> ( F e. ( J Cn K ) -> F : X --> Y ) )
3		elpwi 3596	. . . . . . 7 |- ( x e. ~P Y -> x C_ Y )
4	3	adantl 277	. . . . . 6 |- ( ( ( J e. (TopOn ` X ) /\ K e. (TopOn ` Y ) ) /\ x e. ~P Y ) -> x C_ Y )
5		toponuni 13786	. . . . . . 7 |- ( K e. (TopOn ` Y ) -> Y = U. K )
6	5	ad2antlr 489	. . . . . 6 |- ( ( ( J e. (TopOn ` X ) /\ K e. (TopOn ` Y ) ) /\ x e. ~P Y ) -> Y = U. K )
7	4, 6	sseqtrd 3205	. . . . 5 |- ( ( ( J e. (TopOn ` X ) /\ K e. (TopOn ` Y ) ) /\ x e. ~P Y ) -> x C_ U. K )
8		eqid 2187	. . . . . . 7 |- U. K = U. K
9	8	cnntri 13995	. . . . . 6 |- ( ( F e. ( J Cn K ) /\ x C_ U. K ) -> ( `' F " ( ( int ` K ) ` x ) ) C_ ( ( int ` J ) ` ( `' F " x ) ) )
10	9	expcom 116	. . . . 5 |- ( x C_ U. K -> ( F e. ( J Cn K ) -> ( `' F " ( ( int ` K ) ` x ) ) C_ ( ( int ` J ) ` ( `' F " x ) ) ) )
11	7, 10	syl 14	. . . 4 |- ( ( ( J e. (TopOn ` X ) /\ K e. (TopOn ` Y ) ) /\ x e. ~P Y ) -> ( F e. ( J Cn K ) -> ( `' F " ( ( int ` K ) ` x ) ) C_ ( ( int ` J ) ` ( `' F " x ) ) ) )
12	11	ralrimdva 2567	. . 3 |- ( ( J e. (TopOn ` X ) /\ K e. (TopOn ` Y ) ) -> ( F e. ( J Cn K ) -> A. x e. ~P Y ( `' F " ( ( int ` K ) ` x ) ) C_ ( ( int ` J ) ` ( `' F " x ) ) ) )
13	2, 12	jcad 307	. 2 |- ( ( J e. (TopOn ` X ) /\ K e. (TopOn ` Y ) ) -> ( F e. ( J Cn K ) -> ( F : X --> Y /\ A. x e. ~P Y ( `' F " ( ( int ` K ) ` x ) ) C_ ( ( int ` J ) ` ( `' F " x ) ) ) ) )
14		toponss 13797	. . . . . . . . . 10 |- ( ( K e. (TopOn ` Y ) /\ x e. K ) -> x C_ Y )
15		velpw 3594	. . . . . . . . . 10 |- ( x e. ~P Y <-> x C_ Y )
16	14, 15	sylibr 134	. . . . . . . . 9 |- ( ( K e. (TopOn ` Y ) /\ x e. K ) -> x e. ~P Y )
17	16	ex 115	. . . . . . . 8 |- ( K e. (TopOn ` Y ) -> ( x e. K -> x e. ~P Y ) )
18	17	ad2antlr 489	. . . . . . 7 |- ( ( ( J e. (TopOn ` X ) /\ K e. (TopOn ` Y ) ) /\ F : X --> Y ) -> ( x e. K -> x e. ~P Y ) )
19	18	imim1d 75	. . . . . 6 |- ( ( ( J e. (TopOn ` X ) /\ K e. (TopOn ` Y ) ) /\ F : X --> Y ) -> ( ( x e. ~P Y -> ( `' F " ( ( int ` K ) ` x ) ) C_ ( ( int ` J ) ` ( `' F " x ) ) ) -> ( x e. K -> ( `' F " ( ( int ` K ) ` x ) ) C_ ( ( int ` J ) ` ( `' F " x ) ) ) ) )
20		topontop 13785	. . . . . . . . . . 11 |- ( J e. (TopOn ` X ) -> J e. Top )
21	20	ad3antrrr 492	. . . . . . . . . 10 |- ( ( ( ( J e. (TopOn ` X ) /\ K e. (TopOn ` Y ) ) /\ F : X --> Y ) /\ x e. K ) -> J e. Top )
22		cnvimass 5003	. . . . . . . . . . 11 |- ( `' F " x ) C_ dom F
23		fdm 5383	. . . . . . . . . . . . 13 |- ( F : X --> Y -> dom F = X )
24	23	ad2antlr 489	. . . . . . . . . . . 12 |- ( ( ( ( J e. (TopOn ` X ) /\ K e. (TopOn ` Y ) ) /\ F : X --> Y ) /\ x e. K ) -> dom F = X )
25		toponuni 13786	. . . . . . . . . . . . 13 |- ( J e. (TopOn ` X ) -> X = U. J )
26	25	ad3antrrr 492	. . . . . . . . . . . 12 |- ( ( ( ( J e. (TopOn ` X ) /\ K e. (TopOn ` Y ) ) /\ F : X --> Y ) /\ x e. K ) -> X = U. J )
27	24, 26	eqtrd 2220	. . . . . . . . . . 11 |- ( ( ( ( J e. (TopOn ` X ) /\ K e. (TopOn ` Y ) ) /\ F : X --> Y ) /\ x e. K ) -> dom F = U. J )
28	22, 27	sseqtrid 3217	. . . . . . . . . 10 |- ( ( ( ( J e. (TopOn ` X ) /\ K e. (TopOn ` Y ) ) /\ F : X --> Y ) /\ x e. K ) -> ( `' F " x ) C_ U. J )
29		eqid 2187	. . . . . . . . . . 11 |- U. J = U. J
30	29	ntrss2 13892	. . . . . . . . . 10 |- ( ( J e. Top /\ ( `' F " x ) C_ U. J ) -> ( ( int ` J ) ` ( `' F " x ) ) C_ ( `' F " x ) )
31	21, 28, 30	syl2anc 411	. . . . . . . . 9 |- ( ( ( ( J e. (TopOn ` X ) /\ K e. (TopOn ` Y ) ) /\ F : X --> Y ) /\ x e. K ) -> ( ( int ` J ) ` ( `' F " x ) ) C_ ( `' F " x ) )
32		eqss 3182	. . . . . . . . . 10 |- ( ( ( int ` J ) ` ( `' F " x ) ) = ( `' F " x ) <-> ( ( ( int ` J ) ` ( `' F " x ) ) C_ ( `' F " x ) /\ ( `' F " x ) C_ ( ( int ` J ) ` ( `' F " x ) ) ) )
33	32	baib 920	. . . . . . . . 9 |- ( ( ( int ` J ) ` ( `' F " x ) ) C_ ( `' F " x ) -> ( ( ( int ` J ) ` ( `' F " x ) ) = ( `' F " x ) <-> ( `' F " x ) C_ ( ( int ` J ) ` ( `' F " x ) ) ) )
34	31, 33	syl 14	. . . . . . . 8 |- ( ( ( ( J e. (TopOn ` X ) /\ K e. (TopOn ` Y ) ) /\ F : X --> Y ) /\ x e. K ) -> ( ( ( int ` J ) ` ( `' F " x ) ) = ( `' F " x ) <-> ( `' F " x ) C_ ( ( int ` J ) ` ( `' F " x ) ) ) )
35	29	isopn3 13896	. . . . . . . . 9 |- ( ( J e. Top /\ ( `' F " x ) C_ U. J ) -> ( ( `' F " x ) e. J <-> ( ( int ` J ) ` ( `' F " x ) ) = ( `' F " x ) ) )
36	21, 28, 35	syl2anc 411	. . . . . . . 8 |- ( ( ( ( J e. (TopOn ` X ) /\ K e. (TopOn ` Y ) ) /\ F : X --> Y ) /\ x e. K ) -> ( ( `' F " x ) e. J <-> ( ( int ` J ) ` ( `' F " x ) ) = ( `' F " x ) ) )
37		topontop 13785	. . . . . . . . . . . 12 |- ( K e. (TopOn ` Y ) -> K e. Top )
38	37	ad3antlr 493	. . . . . . . . . . 11 |- ( ( ( ( J e. (TopOn ` X ) /\ K e. (TopOn ` Y ) ) /\ F : X --> Y ) /\ x e. K ) -> K e. Top )
39		isopn3i 13906	. . . . . . . . . . 11 |- ( ( K e. Top /\ x e. K ) -> ( ( int ` K ) ` x ) = x )
40	38, 39	sylancom 420	. . . . . . . . . 10 |- ( ( ( ( J e. (TopOn ` X ) /\ K e. (TopOn ` Y ) ) /\ F : X --> Y ) /\ x e. K ) -> ( ( int ` K ) ` x ) = x )
41	40	imaeq2d 4982	. . . . . . . . 9 |- ( ( ( ( J e. (TopOn ` X ) /\ K e. (TopOn ` Y ) ) /\ F : X --> Y ) /\ x e. K ) -> ( `' F " ( ( int ` K ) ` x ) ) = ( `' F " x ) )
42	41	sseq1d 3196	. . . . . . . 8 |- ( ( ( ( J e. (TopOn ` X ) /\ K e. (TopOn ` Y ) ) /\ F : X --> Y ) /\ x e. K ) -> ( ( `' F " ( ( int ` K ) ` x ) ) C_ ( ( int ` J ) ` ( `' F " x ) ) <-> ( `' F " x ) C_ ( ( int ` J ) ` ( `' F " x ) ) ) )
43	34, 36, 42	3bitr4rd 221	. . . . . . 7 |- ( ( ( ( J e. (TopOn ` X ) /\ K e. (TopOn ` Y ) ) /\ F : X --> Y ) /\ x e. K ) -> ( ( `' F " ( ( int ` K ) ` x ) ) C_ ( ( int ` J ) ` ( `' F " x ) ) <-> ( `' F " x ) e. J ) )
44	43	pm5.74da 443	. . . . . 6 |- ( ( ( J e. (TopOn ` X ) /\ K e. (TopOn ` Y ) ) /\ F : X --> Y ) -> ( ( x e. K -> ( `' F " ( ( int ` K ) ` x ) ) C_ ( ( int ` J ) ` ( `' F " x ) ) ) <-> ( x e. K -> ( `' F " x ) e. J ) ) )
45	19, 44	sylibd 149	. . . . 5 |- ( ( ( J e. (TopOn ` X ) /\ K e. (TopOn ` Y ) ) /\ F : X --> Y ) -> ( ( x e. ~P Y -> ( `' F " ( ( int ` K ) ` x ) ) C_ ( ( int ` J ) ` ( `' F " x ) ) ) -> ( x e. K -> ( `' F " x ) e. J ) ) )
46	45	ralimdv2 2557	. . . 4 |- ( ( ( J e. (TopOn ` X ) /\ K e. (TopOn ` Y ) ) /\ F : X --> Y ) -> ( A. x e. ~P Y ( `' F " ( ( int ` K ) ` x ) ) C_ ( ( int ` J ) ` ( `' F " x ) ) -> A. x e. K ( `' F " x ) e. J ) )
47	46	imdistanda 448	. . 3 |- ( ( J e. (TopOn ` X ) /\ K e. (TopOn ` Y ) ) -> ( ( F : X --> Y /\ A. x e. ~P Y ( `' F " ( ( int ` K ) ` x ) ) C_ ( ( int ` J ) ` ( `' F " x ) ) ) -> ( F : X --> Y /\ A. x e. K ( `' F " x ) e. J ) ) )
48		iscn 13968	. . 3 |- ( ( J e. (TopOn ` X ) /\ K e. (TopOn ` Y ) ) -> ( F e. ( J Cn K ) <-> ( F : X --> Y /\ A. x e. K ( `' F " x ) e. J ) ) )
49	47, 48	sylibrd 169	. 2 |- ( ( J e. (TopOn ` X ) /\ K e. (TopOn ` Y ) ) -> ( ( F : X --> Y /\ A. x e. ~P Y ( `' F " ( ( int ` K ) ` x ) ) C_ ( ( int ` J ) ` ( `' F " x ) ) ) -> F e. ( J Cn K ) ) )
50	13, 49	impbid 129	1 |- ( ( J e. (TopOn ` X ) /\ K e. (TopOn ` Y ) ) -> ( F e. ( J Cn K ) <-> ( F : X --> Y /\ A. x e. ~P Y ( `' F " ( ( int ` K ) ` x ) ) C_ ( ( int ` J ) ` ( `' F " x ) ) ) ) )

Syntax hints:   -> wi 4   /\ wa 104   <-> wb 105   = wceq 1363   e. wcel 2158   A.wral 2465   C_ wss 3141   ~Pcpw 3587   U.cuni 3821   `'ccnv 4637   dom cdm 4638   "cima 4641   -->wf 5224   ` cfv 5228  (class class class)co 5888   Topctop 13768  TopOnctopon 13781   intcnt 13864   Cn ccn 13956

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-in1 615  ax-in2 616  ax-io 710  ax-5 1457  ax-7 1458  ax-gen 1459  ax-ie1 1503  ax-ie2 1504  ax-8 1514  ax-10 1515  ax-11 1516  ax-i12 1517  ax-bndl 1519  ax-4 1520  ax-17 1536  ax-i9 1540  ax-ial 1544  ax-i5r 1545  ax-13 2160  ax-14 2161  ax-ext 2169  ax-coll 4130  ax-sep 4133  ax-pow 4186  ax-pr 4221  ax-un 4445  ax-setind 4548

This theorem depends on definitions:  df-bi 117  df-3an 981  df-tru 1366  df-fal 1369  df-nf 1471  df-sb 1773  df-eu 2039  df-mo 2040  df-clab 2174  df-cleq 2180  df-clel 2183  df-nfc 2318  df-ne 2358  df-ral 2470  df-rex 2471  df-reu 2472  df-rab 2474  df-v 2751  df-sbc 2975  df-csb 3070  df-dif 3143  df-un 3145  df-in 3147  df-ss 3154  df-pw 3589  df-sn 3610  df-pr 3611  df-op 3613  df-uni 3822  df-iun 3900  df-br 4016  df-opab 4077  df-mpt 4078  df-id 4305  df-xp 4644  df-rel 4645  df-cnv 4646  df-co 4647  df-dm 4648  df-rn 4649  df-res 4650  df-ima 4651  df-iota 5190  df-fun 5230  df-fn 5231  df-f 5232  df-f1 5233  df-fo 5234  df-f1o 5235  df-fv 5236  df-ov 5891  df-oprab 5892  df-mpo 5893  df-1st 6154  df-2nd 6155  df-map 6663  df-top 13769  df-topon 13782  df-ntr 13867  df-cn 13959

This theorem is referenced by: (None)