Theorem divcnv 11498

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 109	. . . . . . 7 |- ( ( A e. CC /\ x e. RR+ ) -> A e. CC )
2	1	abscld 11183	. . . . . 6 |- ( ( A e. CC /\ x e. RR+ ) -> ( abs ` A ) e. RR )
3		simpr 110	. . . . . 6 |- ( ( A e. CC /\ x e. RR+ ) -> x e. RR+ )
4	2, 3	rerpdivcld 9724	. . . . 5 |- ( ( A e. CC /\ x e. RR+ ) -> ( ( abs ` A ) / x ) e. RR )
5		arch 9169	. . . . 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 492	. . . . . . . . . 10 |- ( ( ( ( ( A e. CC /\ x e. RR+ ) /\ j e. NN ) /\ ( ( abs ` A ) / x ) < j ) /\ k e. ( ZZ>= ` j ) ) -> A e. CC )
8		eluzelz 9533	. . . . . . . . . . . 12 |- ( k e. ( ZZ>= ` j ) -> k e. ZZ )
9	8	adantl 277	. . . . . . . . . . 11 |- ( ( ( ( ( A e. CC /\ x e. RR+ ) /\ j e. NN ) /\ ( ( abs ` A ) / x ) < j ) /\ k e. ( ZZ>= ` j ) ) -> k e. ZZ )
10	9	zcnd 9372	. . . . . . . . . 10 |- ( ( ( ( ( A e. CC /\ x e. RR+ ) /\ j e. NN ) /\ ( ( abs ` A ) / x ) < j ) /\ k e. ( ZZ>= ` j ) ) -> k e. CC )
11	9	zred 9371	. . . . . . . . . . 11 |- ( ( ( ( ( A e. CC /\ x e. RR+ ) /\ j e. NN ) /\ ( ( abs ` A ) / x ) < j ) /\ k e. ( ZZ>= ` j ) ) -> k e. RR )
12		0red 7955	. . . . . . . . . . . 12 |- ( ( ( ( ( A e. CC /\ x e. RR+ ) /\ j e. NN ) /\ ( ( abs ` A ) / x ) < j ) /\ k e. ( ZZ>= ` j ) ) -> 0 e. RR )
13		simpllr 534	. . . . . . . . . . . . 13 |- ( ( ( ( ( A e. CC /\ x e. RR+ ) /\ j e. NN ) /\ ( ( abs ` A ) / x ) < j ) /\ k e. ( ZZ>= ` j ) ) -> j e. NN )
14	13	nnred 8928	. . . . . . . . . . . 12 |- ( ( ( ( ( A e. CC /\ x e. RR+ ) /\ j e. NN ) /\ ( ( abs ` A ) / x ) < j ) /\ k e. ( ZZ>= ` j ) ) -> j e. RR )
15	13	nngt0d 8959	. . . . . . . . . . . 12 |- ( ( ( ( ( A e. CC /\ x e. RR+ ) /\ j e. NN ) /\ ( ( abs ` A ) / x ) < j ) /\ k e. ( ZZ>= ` j ) ) -> 0 < j )
16		eluzle 9536	. . . . . . . . . . . . 13 |- ( k e. ( ZZ>= ` j ) -> j <_ k )
17	16	adantl 277	. . . . . . . . . . . 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 8376	. . . . . . . . . . 11 |- ( ( ( ( ( A e. CC /\ x e. RR+ ) /\ j e. NN ) /\ ( ( abs ` A ) / x ) < j ) /\ k e. ( ZZ>= ` j ) ) -> 0 < k )
19	11, 18	gt0ap0d 8582	. . . . . . . . . 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 11197	. . . . . . . . 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 8072	. . . . . . . . . . 11 |- ( ( ( ( ( A e. CC /\ x e. RR+ ) /\ j e. NN ) /\ ( ( abs ` A ) / x ) < j ) /\ k e. ( ZZ>= ` j ) ) -> 0 <_ k )
22	11, 21	absidd 11169	. . . . . . . . . 10 |- ( ( ( ( ( A e. CC /\ x e. RR+ ) /\ j e. NN ) /\ ( ( abs ` A ) / x ) < j ) /\ k e. ( ZZ>= ` j ) ) -> ( abs ` k ) = k )
23	22	oveq2d 5888	. . . . . . . . 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 2210	. . . . . . . 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 492	. . . . . . . . 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 492	. . . . . . . . 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 9689	. . . . . . . . 9 |- ( ( ( ( ( A e. CC /\ x e. RR+ ) /\ j e. NN ) /\ ( ( abs ` A ) / x ) < j ) /\ k e. ( ZZ>= ` j ) ) -> k e. RR+ )
28	4	ad3antrrr 492	. . . . . . . . . 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 528	. . . . . . . . . 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 8376	. . . . . . . . 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 9753	. . . . . . . 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 4024	. . . . . . 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 2550	. . . . . 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 115	. . . . 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 2579	. . . 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 2550	. 2 |- ( A e. CC -> A. x e. RR+ E. j e. NN A. k e. ( ZZ>= ` j ) ( abs ` ( A / k ) ) < x )
38		nnuz 9559	. . 3 |- NN = ( ZZ>= ` 1 )
39		1zzd 9276	. . 3 |- ( A e. CC -> 1 e. ZZ )
40		nnex 8921	. . . . 5 |- NN e. _V
41	40	mptex 5741	. . . 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 110	. . . 4 |- ( ( A e. CC /\ k e. NN ) -> k e. NN )
44		simpl 109	. . . . 5 |- ( ( A e. CC /\ k e. NN ) -> A e. CC )
45	43	nncnd 8929	. . . . 5 |- ( ( A e. CC /\ k e. NN ) -> k e. CC )
46	43	nnap0d 8961	. . . . 5 |- ( ( A e. CC /\ k e. NN ) -> k # 0 )
47	44, 45, 46	divclapd 8743	. . . 4 |- ( ( A e. CC /\ k e. NN ) -> ( A / k ) e. CC )
48		oveq2 5880	. . . . 5 |- ( n = k -> ( A / n ) = ( A / k ) )
49		eqid 2177	. . . . 5 |- ( n e. NN |-> ( A / n ) ) = ( n e. NN |-> ( A / n ) )
50	48, 49	fvmptg 5591	. . . 4 |- ( ( k e. NN /\ ( A / k ) e. CC ) -> ( ( n e. NN |-> ( A / n ) ) ` k ) = ( A / k ) )
51	43, 47, 50	syl2anc 411	. . 3 |- ( ( A e. CC /\ k e. NN ) -> ( ( n e. NN |-> ( A / n ) ) ` k ) = ( A / k ) )
52	38, 39, 42, 51, 47	clim0c 11287	. 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 167	1 |- ( A e. CC -> ( n e. NN |-> ( A / n ) ) ~~> 0 )

Syntax hints:   -> wi 4   /\ wa 104   = wceq 1353   e. wcel 2148   A.wral 2455   E.wrex 2456   _Vcvv 2737   class class class wbr 4002   |-> cmpt 4063   ` cfv 5215  (class class class)co 5872   CCcc 7806   RRcr 7807   0cc0 7808   1c1 7809   < clt 7988   <_ cle 7989   / cdiv 8625   NNcn 8915   ZZcz 9249   ZZ>=cuz 9524   RR+crp 9649   abscabs 10999   ~~> cli 11279

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 614  ax-in2 615  ax-io 709  ax-5 1447  ax-7 1448  ax-gen 1449  ax-ie1 1493  ax-ie2 1494  ax-8 1504  ax-10 1505  ax-11 1506  ax-i12 1507  ax-bndl 1509  ax-4 1510  ax-17 1526  ax-i9 1530  ax-ial 1534  ax-i5r 1535  ax-13 2150  ax-14 2151  ax-ext 2159  ax-coll 4117  ax-sep 4120  ax-nul 4128  ax-pow 4173  ax-pr 4208  ax-un 4432  ax-setind 4535  ax-iinf 4586  ax-cnex 7899  ax-resscn 7900  ax-1cn 7901  ax-1re 7902  ax-icn 7903  ax-addcl 7904  ax-addrcl 7905  ax-mulcl 7906  ax-mulrcl 7907  ax-addcom 7908  ax-mulcom 7909  ax-addass 7910  ax-mulass 7911  ax-distr 7912  ax-i2m1 7913  ax-0lt1 7914  ax-1rid 7915  ax-0id 7916  ax-rnegex 7917  ax-precex 7918  ax-cnre 7919  ax-pre-ltirr 7920  ax-pre-ltwlin 7921  ax-pre-lttrn 7922  ax-pre-apti 7923  ax-pre-ltadd 7924  ax-pre-mulgt0 7925  ax-pre-mulext 7926  ax-arch 7927  ax-caucvg 7928

This theorem depends on definitions:  df-bi 117  df-dc 835  df-3or 979  df-3an 980  df-tru 1356  df-fal 1359  df-nf 1461  df-sb 1763  df-eu 2029  df-mo 2030  df-clab 2164  df-cleq 2170  df-clel 2173  df-nfc 2308  df-ne 2348  df-nel 2443  df-ral 2460  df-rex 2461  df-reu 2462  df-rmo 2463  df-rab 2464  df-v 2739  df-sbc 2963  df-csb 3058  df-dif 3131  df-un 3133  df-in 3135  df-ss 3142  df-nul 3423  df-if 3535  df-pw 3577  df-sn 3598  df-pr 3599  df-op 3601  df-uni 3810  df-int 3845  df-iun 3888  df-br 4003  df-opab 4064  df-mpt 4065  df-tr 4101  df-id 4292  df-po 4295  df-iso 4296  df-iord 4365  df-on 4367  df-ilim 4368  df-suc 4370  df-iom 4589  df-xp 4631  df-rel 4632  df-cnv 4633  df-co 4634  df-dm 4635  df-rn 4636  df-res 4637  df-ima 4638  df-iota 5177  df-fun 5217  df-fn 5218  df-f 5219  df-f1 5220  df-fo 5221  df-f1o 5222  df-fv 5223  df-riota 5828  df-ov 5875  df-oprab 5876  df-mpo 5877  df-1st 6138  df-2nd 6139  df-recs 6303  df-frec 6389  df-pnf 7990  df-mnf 7991  df-xr 7992  df-ltxr 7993  df-le 7994  df-sub 8126  df-neg 8127  df-reap 8528  df-ap 8535  df-div 8626  df-inn 8916  df-2 8974  df-3 8975  df-4 8976  df-n0 9173  df-z 9250  df-uz 9525  df-rp 9650  df-seqfrec 10441  df-exp 10515  df-cj 10844  df-re 10845  df-im 10846  df-rsqrt 11000  df-abs 11001  df-clim 11280

This theorem is referenced by:  trireciplem  11501  expcnvap0  11503