Theorem climshft 12048

Description: A shifted function converges iff the original function converges. (Contributed by NM, 16-Aug-2005.) (Revised by Mario Carneiro, 31-Jan-2014.)

Assertion

Ref	Expression
climshft	|- ( ( M e. ZZ /\ F e. V ) -> ( ( F shift M ) ~~> A <-> F ~~> A ) )

Proof of Theorem climshft

Dummy variables f k are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		oveq1 6082	. . . . . 6 |- ( f = F -> ( f shift M ) = ( F shift M ) )
2	1	breq1d 4135	. . . . 5 |- ( f = F -> ( ( f shift M ) ~~> A <-> ( F shift M ) ~~> A ) )
3		breq1 4128	. . . . 5 |- ( f = F -> ( f ~~> A <-> F ~~> A ) )
4	2, 3	bibi12d 235	. . . 4 |- ( f = F -> ( ( ( f shift M ) ~~> A <-> f ~~> A ) <-> ( ( F shift M ) ~~> A <-> F ~~> A ) ) )
5	4	imbi2d 230	. . 3 |- ( f = F -> ( ( M e. ZZ -> ( ( f shift M ) ~~> A <-> f ~~> A ) ) <-> ( M e. ZZ -> ( ( F shift M ) ~~> A <-> F ~~> A ) ) ) )
6		znegcl 9654	. . . . . 6 |- ( M e. ZZ -> -u M e. ZZ )
7		vex 2824	. . . . . . 7 |- f e. _V
8		zcn 9628	. . . . . . 7 |- ( M e. ZZ -> M e. CC )
9		ovshftex 11562	. . . . . . 7 |- ( ( f e. _V /\ M e. CC ) -> ( f shift M ) e. _V )
10	7, 8, 9	sylancr 418	. . . . . 6 |- ( M e. ZZ -> ( f shift M ) e. _V )
11		climshftlemg 12046	. . . . . 6 |- ( ( -u M e. ZZ /\ ( f shift M ) e. _V ) -> ( ( f shift M ) ~~> A -> ( ( f shift M ) shift -u M ) ~~> A ) )
12	6, 10, 11	syl2anc 415	. . . . 5 |- ( M e. ZZ -> ( ( f shift M ) ~~> A -> ( ( f shift M ) shift -u M ) ~~> A ) )
13		eqid 2238	. . . . . 6 |- ( ZZ>= ` M ) = ( ZZ>= ` M )
14	8	negcld 8614	. . . . . . 7 |- ( M e. ZZ -> -u M e. CC )
15		ovshftex 11562	. . . . . . 7 |- ( ( ( f shift M ) e. _V /\ -u M e. CC ) -> ( ( f shift M ) shift -u M ) e. _V )
16	10, 14, 15	syl2anc 415	. . . . . 6 |- ( M e. ZZ -> ( ( f shift M ) shift -u M ) e. _V )
17	7	a1i 9	. . . . . 6 |- ( M e. ZZ -> f e. _V )
18		id 19	. . . . . 6 |- ( M e. ZZ -> M e. ZZ )
19		eluzelcn 9912	. . . . . . 7 |- ( k e. ( ZZ>= ` M ) -> k e. CC )
20	7	shftcan1 11577	. . . . . . 7 |- ( ( M e. CC /\ k e. CC ) -> ( ( ( f shift M ) shift -u M ) ` k ) = ( f ` k ) )
21	8, 19, 20	syl2an 289	. . . . . 6 |- ( ( M e. ZZ /\ k e. ( ZZ>= ` M ) ) -> ( ( ( f shift M ) shift -u M ) ` k ) = ( f ` k ) )
22	13, 16, 17, 18, 21	climeq 12043	. . . . 5 |- ( M e. ZZ -> ( ( ( f shift M ) shift -u M ) ~~> A <-> f ~~> A ) )
23	12, 22	sylibd 149	. . . 4 |- ( M e. ZZ -> ( ( f shift M ) ~~> A -> f ~~> A ) )
24		climshftlemg 12046	. . . . 5 |- ( ( M e. ZZ /\ f e. _V ) -> ( f ~~> A -> ( f shift M ) ~~> A ) )
25	7, 24	mpan2 429	. . . 4 |- ( M e. ZZ -> ( f ~~> A -> ( f shift M ) ~~> A ) )
26	23, 25	impbid 129	. . 3 |- ( M e. ZZ -> ( ( f shift M ) ~~> A <-> f ~~> A ) )
27	5, 26	vtoclg 2883	. 2 |- ( F e. V -> ( M e. ZZ -> ( ( F shift M ) ~~> A <-> F ~~> A ) ) )
28	27	impcom 125	1 |- ( ( M e. ZZ /\ F e. V ) -> ( ( F shift M ) ~~> A <-> F ~~> A ) )

Syntax hints:   -> wi 4   /\ wa 104   <-> wb 105   = wceq 1402   e. wcel 2209   _Vcvv 2821   class class class wbr 4125   ` cfv 5372  (class class class)co 6075   CCcc 8167   -ucneg 8488   ZZcz 9623   ZZ>=cuz 9900   shift cshi 11557   ~~> cli 12022

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-coll 4241  ax-sep 4244  ax-pow 4306  ax-pr 4341  ax-un 4573  ax-setind 4679  ax-cnex 8260  ax-resscn 8261  ax-1cn 8262  ax-1re 8263  ax-icn 8264  ax-addcl 8265  ax-addrcl 8266  ax-mulcl 8267  ax-addcom 8269  ax-addass 8271  ax-distr 8273  ax-i2m1 8274  ax-0lt1 8275  ax-0id 8277  ax-rnegex 8278  ax-cnre 8280  ax-pre-ltirr 8281  ax-pre-ltwlin 8282  ax-pre-lttrn 8283  ax-pre-apti 8284  ax-pre-ltadd 8285

This theorem depends on definitions:  df-bi 117  df-dc 847  df-3or 1010  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-nel 2516  df-ral 2533  df-rex 2534  df-reu 2535  df-rab 2537  df-v 2823  df-sbc 3052  df-csb 3148  df-dif 3222  df-un 3224  df-in 3226  df-ss 3233  df-if 3636  df-pw 3687  df-sn 3711  df-pr 3712  df-op 3714  df-uni 3931  df-int 3966  df-iun 4009  df-br 4126  df-opab 4188  df-mpt 4189  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-ima 4782  df-iota 5332  df-fun 5374  df-fn 5375  df-f 5376  df-f1 5377  df-fo 5378  df-f1o 5379  df-fv 5380  df-riota 6028  df-ov 6078  df-oprab 6079  df-mpo 6080  df-pnf 8352  df-mnf 8353  df-xr 8354  df-ltxr 8355  df-le 8356  df-sub 8489  df-neg 8490  df-inn 9284  df-n0 9543  df-z 9624  df-uz 9901  df-shft 11558  df-clim 12023

This theorem is referenced by:  climshft2  12050  iser3shft  12090  eftlub  12435