Theorem divcnv 11389

Description: The sequence of reciprocals of positive integers, multiplied by the factor A, converges to zero. (Contributed by NM, 6-Feb-2008.) (Revised by Jim Kingdon, 22-Oct-2022.)

Assertion

Ref	Expression
divcnv	|- ( A e. CC -> ( n e. NN |-> ( A / n ) ) ~~> 0 )

Distinct variable group:   A, n

Proof of Theorem divcnv

Dummy variables j k x are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		simpl 108	. . . . . . 7 |- ( ( A e. CC /\ x e. RR+ ) -> A e. CC )
2	1	abscld 11076	. . . . . 6 |- ( ( A e. CC /\ x e. RR+ ) -> ( abs ` A ) e. RR )
3		simpr 109	. . . . . 6 |- ( ( A e. CC /\ x e. RR+ ) -> x e. RR+ )
4	2, 3	rerpdivcld 9630	. . . . 5 |- ( ( A e. CC /\ x e. RR+ ) -> ( ( abs ` A ) / x ) e. RR )
5		arch 9082	. . . . 5 |- ( ( ( abs ` A ) / x ) e. RR -> E. j e. NN ( ( abs ` A ) / x ) < j )
6	4, 5	syl 14	. . . 4 |- ( ( A e. CC /\ x e. RR+ ) -> E. j e. NN ( ( abs ` A ) / x ) < j )
7	1	ad3antrrr 484	. . . . . . . . . 10 |- ( ( ( ( ( A e. CC /\ x e. RR+ ) /\ j e. NN ) /\ ( ( abs ` A ) / x ) < j ) /\ k e. ( ZZ>= ` j ) ) -> A e. CC )
8		eluzelz 9443	. . . . . . . . . . . 12 |- ( k e. ( ZZ>= ` j ) -> k e. ZZ )
9	8	adantl 275	. . . . . . . . . . 11 |- ( ( ( ( ( A e. CC /\ x e. RR+ ) /\ j e. NN ) /\ ( ( abs ` A ) / x ) < j ) /\ k e. ( ZZ>= ` j ) ) -> k e. ZZ )
10	9	zcnd 9282	. . . . . . . . . 10 |- ( ( ( ( ( A e. CC /\ x e. RR+ ) /\ j e. NN ) /\ ( ( abs ` A ) / x ) < j ) /\ k e. ( ZZ>= ` j ) ) -> k e. CC )
11	9	zred 9281	. . . . . . . . . . 11 |- ( ( ( ( ( A e. CC /\ x e. RR+ ) /\ j e. NN ) /\ ( ( abs ` A ) / x ) < j ) /\ k e. ( ZZ>= ` j ) ) -> k e. RR )
12		0red 7874	. . . . . . . . . . . 12 |- ( ( ( ( ( A e. CC /\ x e. RR+ ) /\ j e. NN ) /\ ( ( abs ` A ) / x ) < j ) /\ k e. ( ZZ>= ` j ) ) -> 0 e. RR )
13		simpllr 524	. . . . . . . . . . . . 13 |- ( ( ( ( ( A e. CC /\ x e. RR+ ) /\ j e. NN ) /\ ( ( abs ` A ) / x ) < j ) /\ k e. ( ZZ>= ` j ) ) -> j e. NN )
14	13	nnred 8841	. . . . . . . . . . . 12 |- ( ( ( ( ( A e. CC /\ x e. RR+ ) /\ j e. NN ) /\ ( ( abs ` A ) / x ) < j ) /\ k e. ( ZZ>= ` j ) ) -> j e. RR )
15	13	nngt0d 8872	. . . . . . . . . . . 12 |- ( ( ( ( ( A e. CC /\ x e. RR+ ) /\ j e. NN ) /\ ( ( abs ` A ) / x ) < j ) /\ k e. ( ZZ>= ` j ) ) -> 0 < j )
16		eluzle 9446	. . . . . . . . . . . . 13 |- ( k e. ( ZZ>= ` j ) -> j <_ k )
17	16	adantl 275	. . . . . . . . . . . 12 |- ( ( ( ( ( A e. CC /\ x e. RR+ ) /\ j e. NN ) /\ ( ( abs ` A ) / x ) < j ) /\ k e. ( ZZ>= ` j ) ) -> j <_ k )
18	12, 14, 11, 15, 17	ltletrd 8293	. . . . . . . . . . 11 |- ( ( ( ( ( A e. CC /\ x e. RR+ ) /\ j e. NN ) /\ ( ( abs ` A ) / x ) < j ) /\ k e. ( ZZ>= ` j ) ) -> 0 < k )
19	11, 18	gt0ap0d 8499	. . . . . . . . . 10 |- ( ( ( ( ( A e. CC /\ x e. RR+ ) /\ j e. NN ) /\ ( ( abs ` A ) / x ) < j ) /\ k e. ( ZZ>= ` j ) ) -> k # 0 )
20	7, 10, 19	absdivapd 11090	. . . . . . . . 9 |- ( ( ( ( ( A e. CC /\ x e. RR+ ) /\ j e. NN ) /\ ( ( abs ` A ) / x ) < j ) /\ k e. ( ZZ>= ` j ) ) -> ( abs ` ( A / k ) ) = ( ( abs ` A ) / ( abs ` k ) ) )
21	12, 11, 18	ltled 7989	. . . . . . . . . . 11 |- ( ( ( ( ( A e. CC /\ x e. RR+ ) /\ j e. NN ) /\ ( ( abs ` A ) / x ) < j ) /\ k e. ( ZZ>= ` j ) ) -> 0 <_ k )
22	11, 21	absidd 11062	. . . . . . . . . 10 |- ( ( ( ( ( A e. CC /\ x e. RR+ ) /\ j e. NN ) /\ ( ( abs ` A ) / x ) < j ) /\ k e. ( ZZ>= ` j ) ) -> ( abs ` k ) = k )
23	22	oveq2d 5837	. . . . . . . . 9 |- ( ( ( ( ( A e. CC /\ x e. RR+ ) /\ j e. NN ) /\ ( ( abs ` A ) / x ) < j ) /\ k e. ( ZZ>= ` j ) ) -> ( ( abs ` A ) / ( abs ` k ) ) = ( ( abs ` A ) / k ) )
24	20, 23	eqtrd 2190	. . . . . . . 8 |- ( ( ( ( ( A e. CC /\ x e. RR+ ) /\ j e. NN ) /\ ( ( abs ` A ) / x ) < j ) /\ k e. ( ZZ>= ` j ) ) -> ( abs ` ( A / k ) ) = ( ( abs ` A ) / k ) )
25	2	ad3antrrr 484	. . . . . . . . 9 |- ( ( ( ( ( A e. CC /\ x e. RR+ ) /\ j e. NN ) /\ ( ( abs ` A ) / x ) < j ) /\ k e. ( ZZ>= ` j ) ) -> ( abs ` A ) e. RR )
26	3	ad3antrrr 484	. . . . . . . . 9 |- ( ( ( ( ( A e. CC /\ x e. RR+ ) /\ j e. NN ) /\ ( ( abs ` A ) / x ) < j ) /\ k e. ( ZZ>= ` j ) ) -> x e. RR+ )
27	11, 18	elrpd 9595	. . . . . . . . 9 |- ( ( ( ( ( A e. CC /\ x e. RR+ ) /\ j e. NN ) /\ ( ( abs ` A ) / x ) < j ) /\ k e. ( ZZ>= ` j ) ) -> k e. RR+ )
28	4	ad3antrrr 484	. . . . . . . . . 10 |- ( ( ( ( ( A e. CC /\ x e. RR+ ) /\ j e. NN ) /\ ( ( abs ` A ) / x ) < j ) /\ k e. ( ZZ>= ` j ) ) -> ( ( abs ` A ) / x ) e. RR )
29		simplr 520	. . . . . . . . . 10 |- ( ( ( ( ( A e. CC /\ x e. RR+ ) /\ j e. NN ) /\ ( ( abs ` A ) / x ) < j ) /\ k e. ( ZZ>= ` j ) ) -> ( ( abs ` A ) / x ) < j )
30	28, 14, 11, 29, 17	ltletrd 8293	. . . . . . . . 9 |- ( ( ( ( ( A e. CC /\ x e. RR+ ) /\ j e. NN ) /\ ( ( abs ` A ) / x ) < j ) /\ k e. ( ZZ>= ` j ) ) -> ( ( abs ` A ) / x ) < k )
31	25, 26, 27, 30	ltdiv23d 9659	. . . . . . . 8 |- ( ( ( ( ( A e. CC /\ x e. RR+ ) /\ j e. NN ) /\ ( ( abs ` A ) / x ) < j ) /\ k e. ( ZZ>= ` j ) ) -> ( ( abs ` A ) / k ) < x )
32	24, 31	eqbrtrd 3986	. . . . . . 7 |- ( ( ( ( ( A e. CC /\ x e. RR+ ) /\ j e. NN ) /\ ( ( abs ` A ) / x ) < j ) /\ k e. ( ZZ>= ` j ) ) -> ( abs ` ( A / k ) ) < x )
33	32	ralrimiva 2530	. . . . . 6 |- ( ( ( ( A e. CC /\ x e. RR+ ) /\ j e. NN ) /\ ( ( abs ` A ) / x ) < j ) -> A. k e. ( ZZ>= ` j ) ( abs ` ( A / k ) ) < x )
34	33	ex 114	. . . . 5 |- ( ( ( A e. CC /\ x e. RR+ ) /\ j e. NN ) -> ( ( ( abs ` A ) / x ) < j -> A. k e. ( ZZ>= ` j ) ( abs ` ( A / k ) ) < x ) )
35	34	reximdva 2559	. . . 4 |- ( ( A e. CC /\ x e. RR+ ) -> ( E. j e. NN ( ( abs ` A ) / x ) < j -> E. j e. NN A. k e. ( ZZ>= ` j ) ( abs ` ( A / k ) ) < x ) )
36	6, 35	mpd 13	. . 3 |- ( ( A e. CC /\ x e. RR+ ) -> E. j e. NN A. k e. ( ZZ>= ` j ) ( abs ` ( A / k ) ) < x )
37	36	ralrimiva 2530	. 2 |- ( A e. CC -> A. x e. RR+ E. j e. NN A. k e. ( ZZ>= ` j ) ( abs ` ( A / k ) ) < x )
38		nnuz 9469	. . 3 |- NN = ( ZZ>= ` 1 )
39		1zzd 9189	. . 3 |- ( A e. CC -> 1 e. ZZ )
40		nnex 8834	. . . . 5 |- NN e. _V
41	40	mptex 5692	. . . 4 |- ( n e. NN |-> ( A / n ) ) e. _V
42	41	a1i 9	. . 3 |- ( A e. CC -> ( n e. NN |-> ( A / n ) ) e. _V )
43		simpr 109	. . . 4 |- ( ( A e. CC /\ k e. NN ) -> k e. NN )
44		simpl 108	. . . . 5 |- ( ( A e. CC /\ k e. NN ) -> A e. CC )
45	43	nncnd 8842	. . . . 5 |- ( ( A e. CC /\ k e. NN ) -> k e. CC )
46	43	nnap0d 8874	. . . . 5 |- ( ( A e. CC /\ k e. NN ) -> k # 0 )
47	44, 45, 46	divclapd 8658	. . . 4 |- ( ( A e. CC /\ k e. NN ) -> ( A / k ) e. CC )
48		oveq2 5829	. . . . 5 |- ( n = k -> ( A / n ) = ( A / k ) )
49		eqid 2157	. . . . 5 |- ( n e. NN |-> ( A / n ) ) = ( n e. NN |-> ( A / n ) )
50	48, 49	fvmptg 5543	. . . 4 |- ( ( k e. NN /\ ( A / k ) e. CC ) -> ( ( n e. NN |-> ( A / n ) ) ` k ) = ( A / k ) )
51	43, 47, 50	syl2anc 409	. . 3 |- ( ( A e. CC /\ k e. NN ) -> ( ( n e. NN |-> ( A / n ) ) ` k ) = ( A / k ) )
52	38, 39, 42, 51, 47	clim0c 11178	. 2 |- ( A e. CC -> ( ( n e. NN |-> ( A / n ) ) ~~> 0 <-> A. x e. RR+ E. j e. NN A. k e. ( ZZ>= ` j ) ( abs ` ( A / k ) ) < x ) )
53	37, 52	mpbird 166	1 |- ( A e. CC -> ( n e. NN |-> ( A / n ) ) ~~> 0 )

Syntax hints:   -> wi 4   /\ wa 103   = wceq 1335   e. wcel 2128   A.wral 2435   E.wrex 2436   _Vcvv 2712   class class class wbr 3965   |-> cmpt 4025   ` cfv 5169  (class class class)co 5821   CCcc 7725   RRcr 7726   0cc0 7727   1c1 7728   < clt 7907   <_ cle 7908   / cdiv 8540   NNcn 8828   ZZcz 9162   ZZ>=cuz 9434   RR+crp 9555   abscabs 10892   ~~> cli 11170

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-in1 604  ax-in2 605  ax-io 699  ax-5 1427  ax-7 1428  ax-gen 1429  ax-ie1 1473  ax-ie2 1474  ax-8 1484  ax-10 1485  ax-11 1486  ax-i12 1487  ax-bndl 1489  ax-4 1490  ax-17 1506  ax-i9 1510  ax-ial 1514  ax-i5r 1515  ax-13 2130  ax-14 2131  ax-ext 2139  ax-coll 4079  ax-sep 4082  ax-nul 4090  ax-pow 4135  ax-pr 4169  ax-un 4393  ax-setind 4495  ax-iinf 4546  ax-cnex 7818  ax-resscn 7819  ax-1cn 7820  ax-1re 7821  ax-icn 7822  ax-addcl 7823  ax-addrcl 7824  ax-mulcl 7825  ax-mulrcl 7826  ax-addcom 7827  ax-mulcom 7828  ax-addass 7829  ax-mulass 7830  ax-distr 7831  ax-i2m1 7832  ax-0lt1 7833  ax-1rid 7834  ax-0id 7835  ax-rnegex 7836  ax-precex 7837  ax-cnre 7838  ax-pre-ltirr 7839  ax-pre-ltwlin 7840  ax-pre-lttrn 7841  ax-pre-apti 7842  ax-pre-ltadd 7843  ax-pre-mulgt0 7844  ax-pre-mulext 7845  ax-arch 7846  ax-caucvg 7847

This theorem depends on definitions:  df-bi 116  df-dc 821  df-3or 964  df-3an 965  df-tru 1338  df-fal 1341  df-nf 1441  df-sb 1743  df-eu 2009  df-mo 2010  df-clab 2144  df-cleq 2150  df-clel 2153  df-nfc 2288  df-ne 2328  df-nel 2423  df-ral 2440  df-rex 2441  df-reu 2442  df-rmo 2443  df-rab 2444  df-v 2714  df-sbc 2938  df-csb 3032  df-dif 3104  df-un 3106  df-in 3108  df-ss 3115  df-nul 3395  df-if 3506  df-pw 3545  df-sn 3566  df-pr 3567  df-op 3569  df-uni 3773  df-int 3808  df-iun 3851  df-br 3966  df-opab 4026  df-mpt 4027  df-tr 4063  df-id 4253  df-po 4256  df-iso 4257  df-iord 4326  df-on 4328  df-ilim 4329  df-suc 4331  df-iom 4549  df-xp 4591  df-rel 4592  df-cnv 4593  df-co 4594  df-dm 4595  df-rn 4596  df-res 4597  df-ima 4598  df-iota 5134  df-fun 5171  df-fn 5172  df-f 5173  df-f1 5174  df-fo 5175  df-f1o 5176  df-fv 5177  df-riota 5777  df-ov 5824  df-oprab 5825  df-mpo 5826  df-1st 6085  df-2nd 6086  df-recs 6249  df-frec 6335  df-pnf 7909  df-mnf 7910  df-xr 7911  df-ltxr 7912  df-le 7913  df-sub 8043  df-neg 8044  df-reap 8445  df-ap 8452  df-div 8541  df-inn 8829  df-2 8887  df-3 8888  df-4 8889  df-n0 9086  df-z 9163  df-uz 9435  df-rp 9556  df-seqfrec 10340  df-exp 10414  df-cj 10737  df-re 10738  df-im 10739  df-rsqrt 10893  df-abs 10894  df-clim 11171

This theorem is referenced by:  trireciplem  11392  expcnvap0  11394