Theorem limcresi 15690

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 15682	. . . . . . 7 |- ( x e. ( F lim CC B ) -> ( F : dom F --> CC /\ dom F C_ CC /\ B e. CC ) )
2	1	simp1d 1040	. . . . . 6 |- ( x e. ( F lim CC B ) -> F : dom F --> CC )
3	1	simp2d 1041	. . . . . 6 |- ( x e. ( F lim CC B ) -> dom F C_ CC )
4	1	simp3d 1042	. . . . . 6 |- ( x e. ( F lim CC B ) -> B e. CC )
5	2, 3, 4	ellimc3ap 15685	. . . . 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 3451	. . . . . . . . 9 |- ( dom F i^i C ) C_ dom F
8		ssralv 3312	. . . . . . . . 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 3416	. . . . . . . . . . . . . . 15 |- ( u e. ( dom F i^i C ) -> u e. C )
11		fvres 5714	. . . . . . . . . . . . . . 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 6097	. . . . . . . . . . . 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 4135	. . . . . . . . . . 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 2617	. . . . . . . 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 2651	. . . . . 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 2618	. . . . 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 5563	. . . . 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 3259	. . . 4 |- ( x e. ( F lim CC B ) -> ( dom F i^i C ) C_ CC )
27	25, 26, 4	ellimc3ap 15685	. . 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 3252	1 |- ( F lim CC B ) C_ ( ( F |` C ) lim CC B )

Syntax hints:   -> wi 4   /\ wa 104   = wceq 1402   e. wcel 2209   A.wral 2528   E.wrex 2529   i^i cin 3219   C_ wss 3220   class class class wbr 4125   dom cdm 4769   |` cres 4771   -->wf 5368   ` cfv 5372  (class class class)co 6075   CCcc 8167   < clt 8350   - cmin 8487   # cap 8899   RR+crp 10033   abscabs 11741   lim CC climc 15678

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 623  ax-in2 624  ax-io 721  ax-5 1500  ax-7 1501  ax-gen 1502  ax-ie1 1546  ax-ie2 1547  ax-8 1557  ax-10 1558  ax-11 1559  ax-i12 1560  ax-bndl 1562  ax-4 1563  ax-17 1579  ax-i9 1583  ax-ial 1587  ax-i5r 1588  ax-14 2212  ax-ext 2220  ax-sep 4244  ax-pow 4306  ax-pr 4341  ax-un 4573  ax-setind 4679  ax-cnex 8260

This theorem depends on definitions:  df-bi 117  df-3an 1011  df-tru 1405  df-fal 1408  df-nf 1514  df-sb 1816  df-eu 2089  df-mo 2090  df-clab 2225  df-cleq 2231  df-clel 2234  df-nfc 2381  df-ne 2421  df-ral 2533  df-rex 2534  df-rab 2537  df-v 2823  df-sbc 3052  df-dif 3222  df-un 3224  df-in 3226  df-ss 3233  df-pw 3687  df-sn 3711  df-pr 3712  df-op 3714  df-uni 3931  df-br 4126  df-opab 4188  df-id 4433  df-xp 4775  df-rel 4776  df-cnv 4777  df-co 4778  df-dm 4779  df-rn 4780  df-res 4781  df-iota 5332  df-fun 5374  df-fn 5375  df-f 5376  df-fv 5380  df-ov 6078  df-oprab 6079  df-mpo 6080  df-pm 6915  df-limced 15680

This theorem is referenced by:  dvidlemap  15715  dvidrelem  15716  dvidsslem  15717  dvcnp2cntop  15723  dvcoapbr  15731