Theorem cnntr 14730

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 14710	. . . 4 |- ( ( J e. (TopOn ` X ) /\ K e. (TopOn ` Y ) /\ F e. ( J Cn K ) ) -> F : X --> Y )
2	1	3expia 1208	. . 3 |- ( ( J e. (TopOn ` X ) /\ K e. (TopOn ` Y ) ) -> ( F e. ( J Cn K ) -> F : X --> Y ) )
3		elpwi 3625	. . . . . . 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 14520	. . . . . . 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 3231	. . . . 5 |- ( ( ( J e. (TopOn ` X ) /\ K e. (TopOn ` Y ) ) /\ x e. ~P Y ) -> x C_ U. K )
8		eqid 2205	. . . . . . 7 |- U. K = U. K
9	8	cnntri 14729	. . . . . 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 2586	. . 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 14531	. . . . . . . . . 10 |- ( ( K e. (TopOn ` Y ) /\ x e. K ) -> x C_ Y )
15		velpw 3623	. . . . . . . . . 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 14519	. . . . . . . . . . 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 5046	. . . . . . . . . . 11 |- ( `' F " x ) C_ dom F
23		fdm 5433	. . . . . . . . . . . . 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 14520	. . . . . . . . . . . . 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 2238	. . . . . . . . . . 11 |- ( ( ( ( J e. (TopOn ` X ) /\ K e. (TopOn ` Y ) ) /\ F : X --> Y ) /\ x e. K ) -> dom F = U. J )
28	22, 27	sseqtrid 3243	. . . . . . . . . 10 |- ( ( ( ( J e. (TopOn ` X ) /\ K e. (TopOn ` Y ) ) /\ F : X --> Y ) /\ x e. K ) -> ( `' F " x ) C_ U. J )
29		eqid 2205	. . . . . . . . . . 11 |- U. J = U. J
30	29	ntrss2 14626	. . . . . . . . . 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 3208	. . . . . . . . . 10 |- ( ( ( int ` J ) ` ( `' F " x ) ) = ( `' F " x ) <-> ( ( ( int ` J ) ` ( `' F " x ) ) C_ ( `' F " x ) /\ ( `' F " x ) C_ ( ( int ` J ) ` ( `' F " x ) ) ) )
33	32	baib 921	. . . . . . . . 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 14630	. . . . . . . . 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 14519	. . . . . . . . . . . 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 14640	. . . . . . . . . . 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 5023	. . . . . . . . 9 |- ( ( ( ( J e. (TopOn ` X ) /\ K e. (TopOn ` Y ) ) /\ F : X --> Y ) /\ x e. K ) -> ( `' F " ( ( int ` K ) ` x ) ) = ( `' F " x ) )
42	41	sseq1d 3222	. . . . . . . 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 2576	. . . 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 14702	. . 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 1373   e. wcel 2176   A.wral 2484   C_ wss 3166   ~Pcpw 3616   U.cuni 3850   `'ccnv 4675   dom cdm 4676   "cima 4679   -->wf 5268   ` cfv 5272  (class class class)co 5946   Topctop 14502  TopOnctopon 14515   intcnt 14598   Cn ccn 14690

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 711  ax-5 1470  ax-7 1471  ax-gen 1472  ax-ie1 1516  ax-ie2 1517  ax-8 1527  ax-10 1528  ax-11 1529  ax-i12 1530  ax-bndl 1532  ax-4 1533  ax-17 1549  ax-i9 1553  ax-ial 1557  ax-i5r 1558  ax-13 2178  ax-14 2179  ax-ext 2187  ax-coll 4160  ax-sep 4163  ax-pow 4219  ax-pr 4254  ax-un 4481  ax-setind 4586

This theorem depends on definitions:  df-bi 117  df-3an 983  df-tru 1376  df-fal 1379  df-nf 1484  df-sb 1786  df-eu 2057  df-mo 2058  df-clab 2192  df-cleq 2198  df-clel 2201  df-nfc 2337  df-ne 2377  df-ral 2489  df-rex 2490  df-reu 2491  df-rab 2493  df-v 2774  df-sbc 2999  df-csb 3094  df-dif 3168  df-un 3170  df-in 3172  df-ss 3179  df-pw 3618  df-sn 3639  df-pr 3640  df-op 3642  df-uni 3851  df-iun 3929  df-br 4046  df-opab 4107  df-mpt 4108  df-id 4341  df-xp 4682  df-rel 4683  df-cnv 4684  df-co 4685  df-dm 4686  df-rn 4687  df-res 4688  df-ima 4689  df-iota 5233  df-fun 5274  df-fn 5275  df-f 5276  df-f1 5277  df-fo 5278  df-f1o 5279  df-fv 5280  df-ov 5949  df-oprab 5950  df-mpo 5951  df-1st 6228  df-2nd 6229  df-map 6739  df-top 14503  df-topon 14516  df-ntr 14601  df-cn 14693

This theorem is referenced by: (None)