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Theorem rlimcxp 20268
Description: Any power to a positive exponent of a converging sequence also converges. (Contributed by Mario Carneiro, 18-Sep-2014.)
Hypotheses
Ref Expression
rlimcxp.1  |-  ( (
ph  /\  n  e.  A )  ->  B  e.  V )
rlimcxp.2  |-  ( ph  ->  ( n  e.  A  |->  B )  ~~> r  0 )
rlimcxp.3  |-  ( ph  ->  C  e.  RR+ )
Assertion
Ref Expression
rlimcxp  |-  ( ph  ->  ( n  e.  A  |->  ( B  ^ c  C ) )  ~~> r  0 )
Distinct variable groups:    A, n    C, n    ph, n
Allowed substitution hints:    B( n)    V( n)

Proof of Theorem rlimcxp
Dummy variables  x  y are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 rlimcxp.2 . . . . . . . . 9  |-  ( ph  ->  ( n  e.  A  |->  B )  ~~> r  0 )
2 rlimf 11975 . . . . . . . . 9  |-  ( ( n  e.  A  |->  B )  ~~> r  0  -> 
( n  e.  A  |->  B ) : dom  ( n  e.  A  |->  B ) --> CC )
31, 2syl 15 . . . . . . . 8  |-  ( ph  ->  ( n  e.  A  |->  B ) : dom  ( n  e.  A  |->  B ) --> CC )
4 rlimcxp.1 . . . . . . . . . . 11  |-  ( (
ph  /\  n  e.  A )  ->  B  e.  V )
54ralrimiva 2626 . . . . . . . . . 10  |-  ( ph  ->  A. n  e.  A  B  e.  V )
6 dmmptg 5170 . . . . . . . . . 10  |-  ( A. n  e.  A  B  e.  V  ->  dom  (
n  e.  A  |->  B )  =  A )
75, 6syl 15 . . . . . . . . 9  |-  ( ph  ->  dom  ( n  e.  A  |->  B )  =  A )
87feq2d 5380 . . . . . . . 8  |-  ( ph  ->  ( ( n  e.  A  |->  B ) : dom  ( n  e.  A  |->  B ) --> CC  <->  ( n  e.  A  |->  B ) : A --> CC ) )
93, 8mpbid 201 . . . . . . 7  |-  ( ph  ->  ( n  e.  A  |->  B ) : A --> CC )
10 eqid 2283 . . . . . . . 8  |-  ( n  e.  A  |->  B )  =  ( n  e.  A  |->  B )
1110fmpt 5681 . . . . . . 7  |-  ( A. n  e.  A  B  e.  CC  <->  ( n  e.  A  |->  B ) : A --> CC )
129, 11sylibr 203 . . . . . 6  |-  ( ph  ->  A. n  e.  A  B  e.  CC )
1312adantr 451 . . . . 5  |-  ( (
ph  /\  x  e.  RR+ )  ->  A. n  e.  A  B  e.  CC )
14 simpr 447 . . . . . 6  |-  ( (
ph  /\  x  e.  RR+ )  ->  x  e.  RR+ )
15 rlimcxp.3 . . . . . . . 8  |-  ( ph  ->  C  e.  RR+ )
1615adantr 451 . . . . . . 7  |-  ( (
ph  /\  x  e.  RR+ )  ->  C  e.  RR+ )
1716rprecred 10401 . . . . . 6  |-  ( (
ph  /\  x  e.  RR+ )  ->  ( 1  /  C )  e.  RR )
1814, 17rpcxpcld 20077 . . . . 5  |-  ( (
ph  /\  x  e.  RR+ )  ->  ( x  ^ c  ( 1  /  C ) )  e.  RR+ )
191adantr 451 . . . . 5  |-  ( (
ph  /\  x  e.  RR+ )  ->  ( n  e.  A  |->  B )  ~~> r  0 )
2013, 18, 19rlimi 11987 . . . 4  |-  ( (
ph  /\  x  e.  RR+ )  ->  E. y  e.  RR  A. n  e.  A  ( y  <_  n  ->  ( abs `  ( B  -  0 ) )  <  ( x  ^ c  ( 1  /  C ) ) ) )
214, 1rlimmptrcl 12081 . . . . . . . . . . . 12  |-  ( (
ph  /\  n  e.  A )  ->  B  e.  CC )
2221adantlr 695 . . . . . . . . . . 11  |-  ( ( ( ph  /\  x  e.  RR+ )  /\  n  e.  A )  ->  B  e.  CC )
2322abscld 11918 . . . . . . . . . 10  |-  ( ( ( ph  /\  x  e.  RR+ )  /\  n  e.  A )  ->  ( abs `  B )  e.  RR )
2422absge0d 11926 . . . . . . . . . 10  |-  ( ( ( ph  /\  x  e.  RR+ )  /\  n  e.  A )  ->  0  <_  ( abs `  B
) )
2518adantr 451 . . . . . . . . . . 11  |-  ( ( ( ph  /\  x  e.  RR+ )  /\  n  e.  A )  ->  (
x  ^ c  ( 1  /  C ) )  e.  RR+ )
2625rpred 10390 . . . . . . . . . 10  |-  ( ( ( ph  /\  x  e.  RR+ )  /\  n  e.  A )  ->  (
x  ^ c  ( 1  /  C ) )  e.  RR )
2725rpge0d 10394 . . . . . . . . . 10  |-  ( ( ( ph  /\  x  e.  RR+ )  /\  n  e.  A )  ->  0  <_  ( x  ^ c 
( 1  /  C
) ) )
2815ad2antrr 706 . . . . . . . . . 10  |-  ( ( ( ph  /\  x  e.  RR+ )  /\  n  e.  A )  ->  C  e.  RR+ )
2923, 24, 26, 27, 28cxplt2d 20073 . . . . . . . . 9  |-  ( ( ( ph  /\  x  e.  RR+ )  /\  n  e.  A )  ->  (
( abs `  B
)  <  ( x  ^ c  ( 1  /  C ) )  <-> 
( ( abs `  B
)  ^ c  C
)  <  ( (
x  ^ c  ( 1  /  C ) )  ^ c  C
) ) )
3022subid1d 9146 . . . . . . . . . . 11  |-  ( ( ( ph  /\  x  e.  RR+ )  /\  n  e.  A )  ->  ( B  -  0 )  =  B )
3130fveq2d 5529 . . . . . . . . . 10  |-  ( ( ( ph  /\  x  e.  RR+ )  /\  n  e.  A )  ->  ( abs `  ( B  - 
0 ) )  =  ( abs `  B
) )
3231breq1d 4033 . . . . . . . . 9  |-  ( ( ( ph  /\  x  e.  RR+ )  /\  n  e.  A )  ->  (
( abs `  ( B  -  0 ) )  <  ( x  ^ c  ( 1  /  C ) )  <-> 
( abs `  B
)  <  ( x  ^ c  ( 1  /  C ) ) ) )
3328rpred 10390 . . . . . . . . . . 11  |-  ( ( ( ph  /\  x  e.  RR+ )  /\  n  e.  A )  ->  C  e.  RR )
34 abscxp2 20040 . . . . . . . . . . 11  |-  ( ( B  e.  CC  /\  C  e.  RR )  ->  ( abs `  ( B  ^ c  C ) )  =  ( ( abs `  B )  ^ c  C ) )
3522, 33, 34syl2anc 642 . . . . . . . . . 10  |-  ( ( ( ph  /\  x  e.  RR+ )  /\  n  e.  A )  ->  ( abs `  ( B  ^ c  C ) )  =  ( ( abs `  B
)  ^ c  C
) )
3628rpcnd 10392 . . . . . . . . . . . . 13  |-  ( ( ( ph  /\  x  e.  RR+ )  /\  n  e.  A )  ->  C  e.  CC )
3728rpne0d 10395 . . . . . . . . . . . . 13  |-  ( ( ( ph  /\  x  e.  RR+ )  /\  n  e.  A )  ->  C  =/=  0 )
3836, 37recid2d 9532 . . . . . . . . . . . 12  |-  ( ( ( ph  /\  x  e.  RR+ )  /\  n  e.  A )  ->  (
( 1  /  C
)  x.  C )  =  1 )
3938oveq2d 5874 . . . . . . . . . . 11  |-  ( ( ( ph  /\  x  e.  RR+ )  /\  n  e.  A )  ->  (
x  ^ c  ( ( 1  /  C
)  x.  C ) )  =  ( x  ^ c  1 ) )
40 simplr 731 . . . . . . . . . . . 12  |-  ( ( ( ph  /\  x  e.  RR+ )  /\  n  e.  A )  ->  x  e.  RR+ )
4117adantr 451 . . . . . . . . . . . 12  |-  ( ( ( ph  /\  x  e.  RR+ )  /\  n  e.  A )  ->  (
1  /  C )  e.  RR )
4240, 41, 36cxpmuld 20081 . . . . . . . . . . 11  |-  ( ( ( ph  /\  x  e.  RR+ )  /\  n  e.  A )  ->  (
x  ^ c  ( ( 1  /  C
)  x.  C ) )  =  ( ( x  ^ c  ( 1  /  C ) )  ^ c  C
) )
4340rpcnd 10392 . . . . . . . . . . . 12  |-  ( ( ( ph  /\  x  e.  RR+ )  /\  n  e.  A )  ->  x  e.  CC )
4443cxp1d 20053 . . . . . . . . . . 11  |-  ( ( ( ph  /\  x  e.  RR+ )  /\  n  e.  A )  ->  (
x  ^ c  1 )  =  x )
4539, 42, 443eqtr3rd 2324 . . . . . . . . . 10  |-  ( ( ( ph  /\  x  e.  RR+ )  /\  n  e.  A )  ->  x  =  ( ( x  ^ c  ( 1  /  C ) )  ^ c  C ) )
4635, 45breq12d 4036 . . . . . . . . 9  |-  ( ( ( ph  /\  x  e.  RR+ )  /\  n  e.  A )  ->  (
( abs `  ( B  ^ c  C ) )  <  x  <->  ( ( abs `  B )  ^ c  C )  <  (
( x  ^ c 
( 1  /  C
) )  ^ c  C ) ) )
4729, 32, 463bitr4d 276 . . . . . . . 8  |-  ( ( ( ph  /\  x  e.  RR+ )  /\  n  e.  A )  ->  (
( abs `  ( B  -  0 ) )  <  ( x  ^ c  ( 1  /  C ) )  <-> 
( abs `  ( B  ^ c  C ) )  <  x ) )
4847biimpd 198 . . . . . . 7  |-  ( ( ( ph  /\  x  e.  RR+ )  /\  n  e.  A )  ->  (
( abs `  ( B  -  0 ) )  <  ( x  ^ c  ( 1  /  C ) )  ->  ( abs `  ( B  ^ c  C ) )  <  x ) )
4948imim2d 48 . . . . . 6  |-  ( ( ( ph  /\  x  e.  RR+ )  /\  n  e.  A )  ->  (
( y  <_  n  ->  ( abs `  ( B  -  0 ) )  <  ( x  ^ c  ( 1  /  C ) ) )  ->  ( y  <_  n  ->  ( abs `  ( B  ^ c  C ) )  < 
x ) ) )
5049ralimdva 2621 . . . . 5  |-  ( (
ph  /\  x  e.  RR+ )  ->  ( A. n  e.  A  (
y  <_  n  ->  ( abs `  ( B  -  0 ) )  <  ( x  ^ c  ( 1  /  C ) ) )  ->  A. n  e.  A  ( y  <_  n  ->  ( abs `  ( B  ^ c  C ) )  <  x ) ) )
5150reximdv 2654 . . . 4  |-  ( (
ph  /\  x  e.  RR+ )  ->  ( E. y  e.  RR  A. n  e.  A  ( y  <_  n  ->  ( abs `  ( B  -  0 ) )  <  (
x  ^ c  ( 1  /  C ) ) )  ->  E. y  e.  RR  A. n  e.  A  ( y  <_  n  ->  ( abs `  ( B  ^ c  C ) )  <  x ) ) )
5220, 51mpd 14 . . 3  |-  ( (
ph  /\  x  e.  RR+ )  ->  E. y  e.  RR  A. n  e.  A  ( y  <_  n  ->  ( abs `  ( B  ^ c  C ) )  <  x ) )
5352ralrimiva 2626 . 2  |-  ( ph  ->  A. x  e.  RR+  E. y  e.  RR  A. n  e.  A  (
y  <_  n  ->  ( abs `  ( B  ^ c  C ) )  <  x ) )
5415rpcnd 10392 . . . . . 6  |-  ( ph  ->  C  e.  CC )
5554adantr 451 . . . . 5  |-  ( (
ph  /\  n  e.  A )  ->  C  e.  CC )
5621, 55cxpcld 20055 . . . 4  |-  ( (
ph  /\  n  e.  A )  ->  ( B  ^ c  C )  e.  CC )
5756ralrimiva 2626 . . 3  |-  ( ph  ->  A. n  e.  A  ( B  ^ c  C )  e.  CC )
58 rlimss 11976 . . . . 5  |-  ( ( n  e.  A  |->  B )  ~~> r  0  ->  dom  ( n  e.  A  |->  B )  C_  RR )
591, 58syl 15 . . . 4  |-  ( ph  ->  dom  ( n  e.  A  |->  B )  C_  RR )
607, 59eqsstr3d 3213 . . 3  |-  ( ph  ->  A  C_  RR )
6157, 60rlim0 11982 . 2  |-  ( ph  ->  ( ( n  e.  A  |->  ( B  ^ c  C ) )  ~~> r  0  <->  A. x  e.  RR+  E. y  e.  RR  A. n  e.  A  ( y  <_  n  ->  ( abs `  ( B  ^ c  C ) )  <  x ) ) )
6253, 61mpbird 223 1  |-  ( ph  ->  ( n  e.  A  |->  ( B  ^ c  C ) )  ~~> r  0 )
Colors of variables: wff set class
Syntax hints:    -> wi 4    /\ wa 358    = wceq 1623    e. wcel 1684   A.wral 2543   E.wrex 2544    C_ wss 3152   class class class wbr 4023    e. cmpt 4077   dom cdm 4689   -->wf 5251   ` cfv 5255  (class class class)co 5858   CCcc 8735   RRcr 8736   0cc0 8737   1c1 8738    x. cmul 8742    < clt 8867    <_ cle 8868    - cmin 9037    / cdiv 9423   RR+crp 10354   abscabs 11719    ~~> r crli 11959    ^ c ccxp 19913
This theorem is referenced by:  cxp2lim  20271  cxploglim2  20273
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-3 7  ax-mp 8  ax-gen 1533  ax-5 1544  ax-17 1603  ax-9 1635  ax-8 1643  ax-13 1686  ax-14 1688  ax-6 1703  ax-7 1708  ax-11 1715  ax-12 1866  ax-ext 2264  ax-rep 4131  ax-sep 4141  ax-nul 4149  ax-pow 4188  ax-pr 4214  ax-un 4512  ax-inf2 7342  ax-cnex 8793  ax-resscn 8794  ax-1cn 8795  ax-icn 8796  ax-addcl 8797  ax-addrcl 8798  ax-mulcl 8799  ax-mulrcl 8800  ax-mulcom 8801  ax-addass 8802  ax-mulass 8803  ax-distr 8804  ax-i2m1 8805  ax-1ne0 8806  ax-1rid 8807  ax-rnegex 8808  ax-rrecex 8809  ax-cnre 8810  ax-pre-lttri 8811  ax-pre-lttrn 8812  ax-pre-ltadd 8813  ax-pre-mulgt0 8814  ax-pre-sup 8815  ax-addf 8816  ax-mulf 8817
This theorem depends on definitions:  df-bi 177  df-or 359  df-an 360  df-3or 935  df-3an 936  df-tru 1310  df-ex 1529  df-nf 1532  df-sb 1630  df-eu 2147  df-mo 2148  df-clab 2270  df-cleq 2276  df-clel 2279  df-nfc 2408  df-ne 2448  df-nel 2449  df-ral 2548  df-rex 2549  df-reu 2550  df-rmo 2551  df-rab 2552  df-v 2790  df-sbc 2992  df-csb 3082  df-dif 3155  df-un 3157  df-in 3159  df-ss 3166  df-pss 3168  df-nul 3456  df-if 3566  df-pw 3627  df-sn 3646  df-pr 3647  df-tp 3648  df-op 3649  df-uni 3828  df-int 3863  df-iun 3907  df-iin 3908  df-br 4024  df-opab 4078  df-mpt 4079  df-tr 4114  df-eprel 4305  df-id 4309  df-po 4314  df-so 4315  df-fr 4352  df-se 4353  df-we 4354  df-ord 4395  df-on 4396  df-lim 4397  df-suc 4398  df-om 4657  df-xp 4695  df-rel 4696  df-cnv 4697  df-co 4698  df-dm 4699  df-rn 4700  df-res 4701  df-ima 4702  df-iota 5219  df-fun 5257  df-fn 5258  df-f 5259  df-f1 5260  df-fo 5261  df-f1o 5262  df-fv 5263  df-isom 5264  df-ov 5861  df-oprab 5862  df-mpt2 5863  df-of 6078  df-1st 6122  df-2nd 6123  df-riota 6304  df-recs 6388  df-rdg 6423  df-1o 6479  df-2o 6480  df-oadd 6483  df-er 6660  df-map 6774  df-pm 6775  df-ixp 6818  df-en 6864  df-dom 6865  df-sdom 6866  df-fin 6867  df-fi 7165  df-sup 7194  df-oi 7225  df-card 7572  df-cda 7794  df-pnf 8869  df-mnf 8870  df-xr 8871  df-ltxr 8872  df-le 8873  df-sub 9039  df-neg 9040  df-div 9424  df-nn 9747  df-2 9804  df-3 9805  df-4 9806  df-5 9807  df-6 9808  df-7 9809  df-8 9810  df-9 9811  df-10 9812  df-n0 9966  df-z 10025  df-dec 10125  df-uz 10231  df-q 10317  df-rp 10355  df-xneg 10452  df-xadd 10453  df-xmul 10454  df-ioo 10660  df-ioc 10661  df-ico 10662  df-icc 10663  df-fz 10783  df-fzo 10871  df-fl 10925  df-mod 10974  df-seq 11047  df-exp 11105  df-fac 11289  df-bc 11316  df-hash 11338  df-shft 11562  df-cj 11584  df-re 11585  df-im 11586  df-sqr 11720  df-abs 11721  df-limsup 11945  df-clim 11962  df-rlim 11963  df-sum 12159  df-ef 12349  df-sin 12351  df-cos 12352  df-pi 12354  df-struct 13150  df-ndx 13151  df-slot 13152  df-base 13153  df-sets 13154  df-ress 13155  df-plusg 13221  df-mulr 13222  df-starv 13223  df-sca 13224  df-vsca 13225  df-tset 13227  df-ple 13228  df-ds 13230  df-hom 13232  df-cco 13233  df-rest 13327  df-topn 13328  df-topgen 13344  df-pt 13345  df-prds 13348  df-xrs 13403  df-0g 13404  df-gsum 13405  df-qtop 13410  df-imas 13411  df-xps 13413  df-mre 13488  df-mrc 13489  df-acs 13491  df-mnd 14367  df-submnd 14416  df-mulg 14492  df-cntz 14793  df-cmn 15091  df-xmet 16373  df-met 16374  df-bl 16375  df-mopn 16376  df-cnfld 16378  df-top 16636  df-bases 16638  df-topon 16639  df-topsp 16640  df-cld 16756  df-ntr 16757  df-cls 16758  df-nei 16835  df-lp 16868  df-perf 16869  df-cn 16957  df-cnp 16958  df-haus 17043  df-tx 17257  df-hmeo 17446  df-fbas 17520  df-fg 17521  df-fil 17541  df-fm 17633  df-flim 17634  df-flf 17635  df-xms 17885  df-ms 17886  df-tms 17887  df-cncf 18382  df-limc 19216  df-dv 19217  df-log 19914  df-cxp 19915
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