Theorem limcresi 15253

Description: Any limit of F is also a limit of the restriction of F. (Contributed by Mario Carneiro, 28-Dec-2016.)

Assertion

Ref	Expression
limcresi	|- ( F lim CC B ) C_ ( ( F |` C ) lim CC B )

Proof of Theorem limcresi

Dummy variables d e u x are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		limcrcl 15245	. . . . . . 7 |- ( x e. ( F lim CC B ) -> ( F : dom F --> CC /\ dom F C_ CC /\ B e. CC ) )
2	1	simp1d 1012	. . . . . 6 |- ( x e. ( F lim CC B ) -> F : dom F --> CC )
3	1	simp2d 1013	. . . . . 6 |- ( x e. ( F lim CC B ) -> dom F C_ CC )
4	1	simp3d 1014	. . . . . 6 |- ( x e. ( F lim CC B ) -> B e. CC )
5	2, 3, 4	ellimc3ap 15248	. . . . 5 |- ( x e. ( F lim CC B ) -> ( x e. ( F lim CC B ) <-> ( x e. CC /\ A. e e. RR+ E. d e. RR+ A. u e. dom F ( ( u # B /\ ( abs ` ( u - B ) ) < d ) -> ( abs ` ( ( F ` u ) - x ) ) < e ) ) ) )
6	5	ibi 176	. . . 4 |- ( x e. ( F lim CC B ) -> ( x e. CC /\ A. e e. RR+ E. d e. RR+ A. u e. dom F ( ( u # B /\ ( abs ` ( u - B ) ) < d ) -> ( abs ` ( ( F ` u ) - x ) ) < e ) ) )
7		inss1 3401	. . . . . . . . 9 |- ( dom F i^i C ) C_ dom F
8		ssralv 3265	. . . . . . . . 9 |- ( ( dom F i^i C ) C_ dom F -> ( A. u e. dom F ( ( u # B /\ ( abs ` ( u - B ) ) < d ) -> ( abs ` ( ( F ` u ) - x ) ) < e ) -> A. u e. ( dom F i^i C ) ( ( u # B /\ ( abs ` ( u - B ) ) < d ) -> ( abs ` ( ( F ` u ) - x ) ) < e ) ) )
9	7, 8	ax-mp 5	. . . . . . . 8 |- ( A. u e. dom F ( ( u # B /\ ( abs ` ( u - B ) ) < d ) -> ( abs ` ( ( F ` u ) - x ) ) < e ) -> A. u e. ( dom F i^i C ) ( ( u # B /\ ( abs ` ( u - B ) ) < d ) -> ( abs ` ( ( F ` u ) - x ) ) < e ) )
10		elinel2 3368	. . . . . . . . . . . . . . 15 |- ( u e. ( dom F i^i C ) -> u e. C )
11		fvres 5623	. . . . . . . . . . . . . . 15 |- ( u e. C -> ( ( F |` C ) ` u ) = ( F ` u ) )
12	10, 11	syl 14	. . . . . . . . . . . . . 14 |- ( u e. ( dom F i^i C ) -> ( ( F |` C ) ` u ) = ( F ` u ) )
13	12	adantl 277	. . . . . . . . . . . . 13 |- ( ( x e. ( F lim CC B ) /\ u e. ( dom F i^i C ) ) -> ( ( F |` C ) ` u ) = ( F ` u ) )
14	13	fvoveq1d 5989	. . . . . . . . . . . 12 |- ( ( x e. ( F lim CC B ) /\ u e. ( dom F i^i C ) ) -> ( abs ` ( ( ( F |` C ) ` u ) - x ) ) = ( abs ` ( ( F ` u ) - x ) ) )
15	14	breq1d 4069	. . . . . . . . . . 11 |- ( ( x e. ( F lim CC B ) /\ u e. ( dom F i^i C ) ) -> ( ( abs ` ( ( ( F |` C ) ` u ) - x ) ) < e <-> ( abs ` ( ( F ` u ) - x ) ) < e ) )
16	15	imbi2d 230	. . . . . . . . . 10 |- ( ( x e. ( F lim CC B ) /\ u e. ( dom F i^i C ) ) -> ( ( ( u # B /\ ( abs ` ( u - B ) ) < d ) -> ( abs ` ( ( ( F |` C ) ` u ) - x ) ) < e ) <-> ( ( u # B /\ ( abs ` ( u - B ) ) < d ) -> ( abs ` ( ( F ` u ) - x ) ) < e ) ) )
17	16	biimprd 158	. . . . . . . . 9 |- ( ( x e. ( F lim CC B ) /\ u e. ( dom F i^i C ) ) -> ( ( ( u # B /\ ( abs ` ( u - B ) ) < d ) -> ( abs ` ( ( F ` u ) - x ) ) < e ) -> ( ( u # B /\ ( abs ` ( u - B ) ) < d ) -> ( abs ` ( ( ( F |` C ) ` u ) - x ) ) < e ) ) )
18	17	ralimdva 2575	. . . . . . . 8 |- ( x e. ( F lim CC B ) -> ( A. u e. ( dom F i^i C ) ( ( u # B /\ ( abs ` ( u - B ) ) < d ) -> ( abs ` ( ( F ` u ) - x ) ) < e ) -> A. u e. ( dom F i^i C ) ( ( u # B /\ ( abs ` ( u - B ) ) < d ) -> ( abs ` ( ( ( F |` C ) ` u ) - x ) ) < e ) ) )
19	9, 18	syl5 32	. . . . . . 7 |- ( x e. ( F lim CC B ) -> ( A. u e. dom F ( ( u # B /\ ( abs ` ( u - B ) ) < d ) -> ( abs ` ( ( F ` u ) - x ) ) < e ) -> A. u e. ( dom F i^i C ) ( ( u # B /\ ( abs ` ( u - B ) ) < d ) -> ( abs ` ( ( ( F |` C ) ` u ) - x ) ) < e ) ) )
20	19	reximdv 2609	. . . . . 6 |- ( x e. ( F lim CC B ) -> ( E. d e. RR+ A. u e. dom F ( ( u # B /\ ( abs ` ( u - B ) ) < d ) -> ( abs ` ( ( F ` u ) - x ) ) < e ) -> E. d e. RR+ A. u e. ( dom F i^i C ) ( ( u # B /\ ( abs ` ( u - B ) ) < d ) -> ( abs ` ( ( ( F |` C ) ` u ) - x ) ) < e ) ) )
21	20	ralimdv 2576	. . . . 5 |- ( x e. ( F lim CC B ) -> ( A. e e. RR+ E. d e. RR+ A. u e. dom F ( ( u # B /\ ( abs ` ( u - B ) ) < d ) -> ( abs ` ( ( F ` u ) - x ) ) < e ) -> A. e e. RR+ E. d e. RR+ A. u e. ( dom F i^i C ) ( ( u # B /\ ( abs ` ( u - B ) ) < d ) -> ( abs ` ( ( ( F |` C ) ` u ) - x ) ) < e ) ) )
22	21	anim2d 337	. . . 4 |- ( x e. ( F lim CC B ) -> ( ( x e. CC /\ A. e e. RR+ E. d e. RR+ A. u e. dom F ( ( u # B /\ ( abs ` ( u - B ) ) < d ) -> ( abs ` ( ( F ` u ) - x ) ) < e ) ) -> ( x e. CC /\ A. e e. RR+ E. d e. RR+ A. u e. ( dom F i^i C ) ( ( u # B /\ ( abs ` ( u - B ) ) < d ) -> ( abs ` ( ( ( F |` C ) ` u ) - x ) ) < e ) ) ) )
23	6, 22	mpd 13	. . 3 |- ( x e. ( F lim CC B ) -> ( x e. CC /\ A. e e. RR+ E. d e. RR+ A. u e. ( dom F i^i C ) ( ( u # B /\ ( abs ` ( u - B ) ) < d ) -> ( abs ` ( ( ( F |` C ) ` u ) - x ) ) < e ) ) )
24		fresin 5476	. . . . 5 |- ( F : dom F --> CC -> ( F |` C ) : ( dom F i^i C ) --> CC )
25	2, 24	syl 14	. . . 4 |- ( x e. ( F lim CC B ) -> ( F |` C ) : ( dom F i^i C ) --> CC )
26	7, 3	sstrid 3212	. . . 4 |- ( x e. ( F lim CC B ) -> ( dom F i^i C ) C_ CC )
27	25, 26, 4	ellimc3ap 15248	. . 3 |- ( x e. ( F lim CC B ) -> ( x e. ( ( F |` C ) lim CC B ) <-> ( x e. CC /\ A. e e. RR+ E. d e. RR+ A. u e. ( dom F i^i C ) ( ( u # B /\ ( abs ` ( u - B ) ) < d ) -> ( abs ` ( ( ( F |` C ) ` u ) - x ) ) < e ) ) ) )
28	23, 27	mpbird 167	. 2 |- ( x e. ( F lim CC B ) -> x e. ( ( F |` C ) lim CC B ) )
29	28	ssriv 3205	1 |- ( F lim CC B ) C_ ( ( F |` C ) lim CC B )

Syntax hints:   -> wi 4   /\ wa 104   = wceq 1373   e. wcel 2178   A.wral 2486   E.wrex 2487   i^i cin 3173   C_ wss 3174   class class class wbr 4059   dom cdm 4693   |` cres 4695   -->wf 5286   ` cfv 5290  (class class class)co 5967   CCcc 7958   < clt 8142   - cmin 8278   # cap 8689   RR+crp 9810   abscabs 11423   lim CC climc 15241

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 1471  ax-7 1472  ax-gen 1473  ax-ie1 1517  ax-ie2 1518  ax-8 1528  ax-10 1529  ax-11 1530  ax-i12 1531  ax-bndl 1533  ax-4 1534  ax-17 1550  ax-i9 1554  ax-ial 1558  ax-i5r 1559  ax-13 2180  ax-14 2181  ax-ext 2189  ax-sep 4178  ax-pow 4234  ax-pr 4269  ax-un 4498  ax-setind 4603  ax-cnex 8051

This theorem depends on definitions:  df-bi 117  df-3an 983  df-tru 1376  df-fal 1379  df-nf 1485  df-sb 1787  df-eu 2058  df-mo 2059  df-clab 2194  df-cleq 2200  df-clel 2203  df-nfc 2339  df-ne 2379  df-ral 2491  df-rex 2492  df-rab 2495  df-v 2778  df-sbc 3006  df-dif 3176  df-un 3178  df-in 3180  df-ss 3187  df-pw 3628  df-sn 3649  df-pr 3650  df-op 3652  df-uni 3865  df-br 4060  df-opab 4122  df-id 4358  df-xp 4699  df-rel 4700  df-cnv 4701  df-co 4702  df-dm 4703  df-rn 4704  df-res 4705  df-iota 5251  df-fun 5292  df-fn 5293  df-f 5294  df-fv 5298  df-ov 5970  df-oprab 5971  df-mpo 5972  df-pm 6761  df-limced 15243

This theorem is referenced by:  dvidlemap  15278  dvidrelem  15279  dvidsslem  15280  dvcnp2cntop  15286  dvcoapbr  15294