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Theorem cnblcld 18809
Description: Two ways to write the closed ball centered at zero. (Contributed by Mario Carneiro, 8-Sep-2015.)
Hypothesis
Ref Expression
cnblcld.1  |-  D  =  ( abs  o.  -  )
Assertion
Ref Expression
cnblcld  |-  ( R  e.  RR*  ->  ( `' abs " ( 0 [,] R ) )  =  { x  e.  CC  |  ( 0 D x )  <_  R } )
Distinct variable groups:    x, D    x, R

Proof of Theorem cnblcld
StepHypRef Expression
1 absf 12141 . . . . 5  |-  abs : CC
--> RR
2 ffn 5591 . . . . 5  |-  ( abs
: CC --> RR  ->  abs 
Fn  CC )
3 elpreima 5850 . . . . 5  |-  ( abs 
Fn  CC  ->  ( x  e.  ( `' abs " ( 0 [,] R
) )  <->  ( x  e.  CC  /\  ( abs `  x )  e.  ( 0 [,] R ) ) ) )
41, 2, 3mp2b 10 . . . 4  |-  ( x  e.  ( `' abs " ( 0 [,] R
) )  <->  ( x  e.  CC  /\  ( abs `  x )  e.  ( 0 [,] R ) ) )
5 abscl 12083 . . . . . . . . . . 11  |-  ( x  e.  CC  ->  ( abs `  x )  e.  RR )
65rexrd 9134 . . . . . . . . . 10  |-  ( x  e.  CC  ->  ( abs `  x )  e. 
RR* )
7 absge0 12092 . . . . . . . . . 10  |-  ( x  e.  CC  ->  0  <_  ( abs `  x
) )
86, 7jca 519 . . . . . . . . 9  |-  ( x  e.  CC  ->  (
( abs `  x
)  e.  RR*  /\  0  <_  ( abs `  x
) ) )
98adantl 453 . . . . . . . 8  |-  ( ( R  e.  RR*  /\  x  e.  CC )  ->  (
( abs `  x
)  e.  RR*  /\  0  <_  ( abs `  x
) ) )
109biantrurd 495 . . . . . . 7  |-  ( ( R  e.  RR*  /\  x  e.  CC )  ->  (
( abs `  x
)  <_  R  <->  ( (
( abs `  x
)  e.  RR*  /\  0  <_  ( abs `  x
) )  /\  ( abs `  x )  <_  R ) ) )
11 df-3an 938 . . . . . . 7  |-  ( ( ( abs `  x
)  e.  RR*  /\  0  <_  ( abs `  x
)  /\  ( abs `  x )  <_  R
)  <->  ( ( ( abs `  x )  e.  RR*  /\  0  <_  ( abs `  x
) )  /\  ( abs `  x )  <_  R ) )
1210, 11syl6rbbr 256 . . . . . 6  |-  ( ( R  e.  RR*  /\  x  e.  CC )  ->  (
( ( abs `  x
)  e.  RR*  /\  0  <_  ( abs `  x
)  /\  ( abs `  x )  <_  R
)  <->  ( abs `  x
)  <_  R )
)
13 0xr 9131 . . . . . . 7  |-  0  e.  RR*
14 simpl 444 . . . . . . 7  |-  ( ( R  e.  RR*  /\  x  e.  CC )  ->  R  e.  RR* )
15 elicc1 10960 . . . . . . 7  |-  ( ( 0  e.  RR*  /\  R  e.  RR* )  ->  (
( abs `  x
)  e.  ( 0 [,] R )  <->  ( ( abs `  x )  e. 
RR*  /\  0  <_  ( abs `  x )  /\  ( abs `  x
)  <_  R )
) )
1613, 14, 15sylancr 645 . . . . . 6  |-  ( ( R  e.  RR*  /\  x  e.  CC )  ->  (
( abs `  x
)  e.  ( 0 [,] R )  <->  ( ( abs `  x )  e. 
RR*  /\  0  <_  ( abs `  x )  /\  ( abs `  x
)  <_  R )
) )
17 0cn 9084 . . . . . . . . . 10  |-  0  e.  CC
18 cnblcld.1 . . . . . . . . . . . 12  |-  D  =  ( abs  o.  -  )
1918cnmetdval 18805 . . . . . . . . . . 11  |-  ( ( 0  e.  CC  /\  x  e.  CC )  ->  ( 0 D x )  =  ( abs `  ( 0  -  x
) ) )
20 abssub 12130 . . . . . . . . . . 11  |-  ( ( 0  e.  CC  /\  x  e.  CC )  ->  ( abs `  (
0  -  x ) )  =  ( abs `  ( x  -  0 ) ) )
2119, 20eqtrd 2468 . . . . . . . . . 10  |-  ( ( 0  e.  CC  /\  x  e.  CC )  ->  ( 0 D x )  =  ( abs `  ( x  -  0 ) ) )
2217, 21mpan 652 . . . . . . . . 9  |-  ( x  e.  CC  ->  (
0 D x )  =  ( abs `  (
x  -  0 ) ) )
23 subid1 9322 . . . . . . . . . 10  |-  ( x  e.  CC  ->  (
x  -  0 )  =  x )
2423fveq2d 5732 . . . . . . . . 9  |-  ( x  e.  CC  ->  ( abs `  ( x  - 
0 ) )  =  ( abs `  x
) )
2522, 24eqtrd 2468 . . . . . . . 8  |-  ( x  e.  CC  ->  (
0 D x )  =  ( abs `  x
) )
2625adantl 453 . . . . . . 7  |-  ( ( R  e.  RR*  /\  x  e.  CC )  ->  (
0 D x )  =  ( abs `  x
) )
2726breq1d 4222 . . . . . 6  |-  ( ( R  e.  RR*  /\  x  e.  CC )  ->  (
( 0 D x )  <_  R  <->  ( abs `  x )  <_  R
) )
2812, 16, 273bitr4d 277 . . . . 5  |-  ( ( R  e.  RR*  /\  x  e.  CC )  ->  (
( abs `  x
)  e.  ( 0 [,] R )  <->  ( 0 D x )  <_  R ) )
2928pm5.32da 623 . . . 4  |-  ( R  e.  RR*  ->  ( ( x  e.  CC  /\  ( abs `  x )  e.  ( 0 [,] R ) )  <->  ( x  e.  CC  /\  ( 0 D x )  <_  R ) ) )
304, 29syl5bb 249 . . 3  |-  ( R  e.  RR*  ->  ( x  e.  ( `' abs " ( 0 [,] R
) )  <->  ( x  e.  CC  /\  ( 0 D x )  <_  R ) ) )
3130abbi2dv 2551 . 2  |-  ( R  e.  RR*  ->  ( `' abs " ( 0 [,] R ) )  =  { x  |  ( x  e.  CC  /\  ( 0 D x )  <_  R ) } )
32 df-rab 2714 . 2  |-  { x  e.  CC  |  ( 0 D x )  <_  R }  =  {
x  |  ( x  e.  CC  /\  (
0 D x )  <_  R ) }
3331, 32syl6eqr 2486 1  |-  ( R  e.  RR*  ->  ( `' abs " ( 0 [,] R ) )  =  { x  e.  CC  |  ( 0 D x )  <_  R } )
Colors of variables: wff set class
Syntax hints:    -> wi 4    <-> wb 177    /\ wa 359    /\ w3a 936    = wceq 1652    e. wcel 1725   {cab 2422   {crab 2709   class class class wbr 4212   `'ccnv 4877   "cima 4881    o. ccom 4882    Fn wfn 5449   -->wf 5450   ` cfv 5454  (class class class)co 6081   CCcc 8988   RRcr 8989   0cc0 8990   RR*cxr 9119    <_ cle 9121    - cmin 9291   [,]cicc 10919   abscabs 12039
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-3 7  ax-mp 8  ax-gen 1555  ax-5 1566  ax-17 1626  ax-9 1666  ax-8 1687  ax-13 1727  ax-14 1729  ax-6 1744  ax-7 1749  ax-11 1761  ax-12 1950  ax-ext 2417  ax-sep 4330  ax-nul 4338  ax-pow 4377  ax-pr 4403  ax-un 4701  ax-cnex 9046  ax-resscn 9047  ax-1cn 9048  ax-icn 9049  ax-addcl 9050  ax-addrcl 9051  ax-mulcl 9052  ax-mulrcl 9053  ax-mulcom 9054  ax-addass 9055  ax-mulass 9056  ax-distr 9057  ax-i2m1 9058  ax-1ne0 9059  ax-1rid 9060  ax-rnegex 9061  ax-rrecex 9062  ax-cnre 9063  ax-pre-lttri 9064  ax-pre-lttrn 9065  ax-pre-ltadd 9066  ax-pre-mulgt0 9067  ax-pre-sup 9068
This theorem depends on definitions:  df-bi 178  df-or 360  df-an 361  df-3or 937  df-3an 938  df-tru 1328  df-ex 1551  df-nf 1554  df-sb 1659  df-eu 2285  df-mo 2286  df-clab 2423  df-cleq 2429  df-clel 2432  df-nfc 2561  df-ne 2601  df-nel 2602  df-ral 2710  df-rex 2711  df-reu 2712  df-rmo 2713  df-rab 2714  df-v 2958  df-sbc 3162  df-csb 3252  df-dif 3323  df-un 3325  df-in 3327  df-ss 3334  df-pss 3336  df-nul 3629  df-if 3740  df-pw 3801  df-sn 3820  df-pr 3821  df-tp 3822  df-op 3823  df-uni 4016  df-iun 4095  df-br 4213  df-opab 4267  df-mpt 4268  df-tr 4303  df-eprel 4494  df-id 4498  df-po 4503  df-so 4504  df-fr 4541  df-we 4543  df-ord 4584  df-on 4585  df-lim 4586  df-suc 4587  df-om 4846  df-xp 4884  df-rel 4885  df-cnv 4886  df-co 4887  df-dm 4888  df-rn 4889  df-res 4890  df-ima 4891  df-iota 5418  df-fun 5456  df-fn 5457  df-f 5458  df-f1 5459  df-fo 5460  df-f1o 5461  df-fv 5462  df-ov 6084  df-oprab 6085  df-mpt2 6086  df-1st 6349  df-2nd 6350  df-riota 6549  df-recs 6633  df-rdg 6668  df-er 6905  df-en 7110  df-dom 7111  df-sdom 7112  df-sup 7446  df-pnf 9122  df-mnf 9123  df-xr 9124  df-ltxr 9125  df-le 9126  df-sub 9293  df-neg 9294  df-div 9678  df-nn 10001  df-2 10058  df-3 10059  df-n0 10222  df-z 10283  df-uz 10489  df-rp 10613  df-icc 10923  df-seq 11324  df-exp 11383  df-cj 11904  df-re 11905  df-im 11906  df-sqr 12040  df-abs 12041
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