Theorem divcnv 12242

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 11925	. . . . . 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 10108	. . . . 5 |- ( ( A e. CC /\ x e. RR+ ) -> ( ( abs ` A ) / x ) e. RR )
5		arch 9539	. . . . 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 496	. . . . . . . . . 10 |- ( ( ( ( ( A e. CC /\ x e. RR+ ) /\ j e. NN ) /\ ( ( abs ` A ) / x ) < j ) /\ k e. ( ZZ>= ` j ) ) -> A e. CC )
8		eluzelz 9910	. . . . . . . . . . . 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 9748	. . . . . . . . . 10 |- ( ( ( ( ( A e. CC /\ x e. RR+ ) /\ j e. NN ) /\ ( ( abs ` A ) / x ) < j ) /\ k e. ( ZZ>= ` j ) ) -> k e. CC )
11	9	zred 9747	. . . . . . . . . . 11 |- ( ( ( ( ( A e. CC /\ x e. RR+ ) /\ j e. NN ) /\ ( ( abs ` A ) / x ) < j ) /\ k e. ( ZZ>= ` j ) ) -> k e. RR )
12		0red 8317	. . . . . . . . . . . 12 |- ( ( ( ( ( A e. CC /\ x e. RR+ ) /\ j e. NN ) /\ ( ( abs ` A ) / x ) < j ) /\ k e. ( ZZ>= ` j ) ) -> 0 e. RR )
13		simpllr 540	. . . . . . . . . . . . 13 |- ( ( ( ( ( A e. CC /\ x e. RR+ ) /\ j e. NN ) /\ ( ( abs ` A ) / x ) < j ) /\ k e. ( ZZ>= ` j ) ) -> j e. NN )
14	13	nnred 9296	. . . . . . . . . . . 12 |- ( ( ( ( ( A e. CC /\ x e. RR+ ) /\ j e. NN ) /\ ( ( abs ` A ) / x ) < j ) /\ k e. ( ZZ>= ` j ) ) -> j e. RR )
15	13	nngt0d 9327	. . . . . . . . . . . 12 |- ( ( ( ( ( A e. CC /\ x e. RR+ ) /\ j e. NN ) /\ ( ( abs ` A ) / x ) < j ) /\ k e. ( ZZ>= ` j ) ) -> 0 < j )
16		eluzle 9913	. . . . . . . . . . . . 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 8741	. . . . . . . . . . 11 |- ( ( ( ( ( A e. CC /\ x e. RR+ ) /\ j e. NN ) /\ ( ( abs ` A ) / x ) < j ) /\ k e. ( ZZ>= ` j ) ) -> 0 < k )
19	11, 18	gt0ap0d 8947	. . . . . . . . . 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 11939	. . . . . . . . 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 8435	. . . . . . . . . . 11 |- ( ( ( ( ( A e. CC /\ x e. RR+ ) /\ j e. NN ) /\ ( ( abs ` A ) / x ) < j ) /\ k e. ( ZZ>= ` j ) ) -> 0 <_ k )
22	11, 21	absidd 11911	. . . . . . . . . 10 |- ( ( ( ( ( A e. CC /\ x e. RR+ ) /\ j e. NN ) /\ ( ( abs ` A ) / x ) < j ) /\ k e. ( ZZ>= ` j ) ) -> ( abs ` k ) = k )
23	22	oveq2d 6091	. . . . . . . . 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 2271	. . . . . . . 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 496	. . . . . . . . 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 496	. . . . . . . . 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 10073	. . . . . . . . 9 |- ( ( ( ( ( A e. CC /\ x e. RR+ ) /\ j e. NN ) /\ ( ( abs ` A ) / x ) < j ) /\ k e. ( ZZ>= ` j ) ) -> k e. RR+ )
28	4	ad3antrrr 496	. . . . . . . . . 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 533	. . . . . . . . . 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 8741	. . . . . . . . 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 10137	. . . . . . . 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 4147	. . . . . . 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 2623	. . . . . 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 2652	. . . 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 2623	. 2 |- ( A e. CC -> A. x e. RR+ E. j e. NN A. k e. ( ZZ>= ` j ) ( abs ` ( A / k ) ) < x )
38		nnuz 9937	. . 3 |- NN = ( ZZ>= ` 1 )
39		1zzd 9650	. . 3 |- ( A e. CC -> 1 e. ZZ )
40		nnex 9289	. . . . 5 |- NN e. _V
41	40	mptex 5934	. . . 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 9297	. . . . 5 |- ( ( A e. CC /\ k e. NN ) -> k e. CC )
46	43	nnap0d 9329	. . . . 5 |- ( ( A e. CC /\ k e. NN ) -> k # 0 )
47	44, 45, 46	divclapd 9110	. . . 4 |- ( ( A e. CC /\ k e. NN ) -> ( A / k ) e. CC )
48		oveq2 6083	. . . . 5 |- ( n = k -> ( A / n ) = ( A / k ) )
49		eqid 2238	. . . . 5 |- ( n e. NN |-> ( A / n ) ) = ( n e. NN |-> ( A / n ) )
50	48, 49	fvmptg 5775	. . . 4 |- ( ( k e. NN /\ ( A / k ) e. CC ) -> ( ( n e. NN |-> ( A / n ) ) ` k ) = ( A / k ) )
51	43, 47, 50	syl2anc 415	. . 3 |- ( ( A e. CC /\ k e. NN ) -> ( ( n e. NN |-> ( A / n ) ) ` k ) = ( A / k ) )
52	38, 39, 42, 51, 47	clim0c 12030	. 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 1402   e. wcel 2209   A.wral 2528   E.wrex 2529   _Vcvv 2821   class class class wbr 4125   |-> cmpt 4187   ` cfv 5372  (class class class)co 6075   CCcc 8167   RRcr 8168   0cc0 8169   1c1 8170   < clt 8350   <_ cle 8351   / cdiv 8992   NNcn 9283   ZZcz 9623   ZZ>=cuz 9900   RR+crp 10033   abscabs 11741   ~~> 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-nul 4254  ax-pow 4306  ax-pr 4341  ax-un 4573  ax-setind 4679  ax-iinf 4730  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-mulrcl 8268  ax-addcom 8269  ax-mulcom 8270  ax-addass 8271  ax-mulass 8272  ax-distr 8273  ax-i2m1 8274  ax-0lt1 8275  ax-1rid 8276  ax-0id 8277  ax-rnegex 8278  ax-precex 8279  ax-cnre 8280  ax-pre-ltirr 8281  ax-pre-ltwlin 8282  ax-pre-lttrn 8283  ax-pre-apti 8284  ax-pre-ltadd 8285  ax-pre-mulgt0 8286  ax-pre-mulext 8287  ax-arch 8288  ax-caucvg 8289

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-rmo 2536  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-nul 3521  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-tr 4225  df-id 4433  df-po 4436  df-iso 4437  df-iord 4506  df-on 4508  df-ilim 4509  df-suc 4511  df-iom 4733  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-1st 6364  df-2nd 6365  df-recs 6566  df-frec 6652  df-pnf 8352  df-mnf 8353  df-xr 8354  df-ltxr 8355  df-le 8356  df-sub 8489  df-neg 8490  df-reap 8893  df-ap 8900  df-div 8993  df-inn 9284  df-2 9342  df-3 9343  df-4 9344  df-n0 9543  df-z 9624  df-uz 9901  df-rp 10034  df-seqfrec 10863  df-exp 10954  df-cj 11585  df-re 11586  df-im 11587  df-rsqrt 11742  df-abs 11743  df-clim 12023

This theorem is referenced by:  trireciplem  12245  expcnvap0  12247