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Theorem cau3 11079
Description: Convert between three-quantifier and four-quantifier versions of the Cauchy criterion. (In particular, the four-quantifier version has no occurrence of  j in the assertion, so it can be used with rexanuz 10952 and friends.) (Contributed by Mario Carneiro, 15-Feb-2014.)
Hypothesis
Ref Expression
cau3.1  |-  Z  =  ( ZZ>= `  M )
Assertion
Ref Expression
cau3  |-  ( A. x  e.  RR+  E. j  e.  Z  A. k  e.  ( ZZ>= `  j )
( ( F `  k )  e.  CC  /\  ( abs `  (
( F `  k
)  -  ( F `
 j ) ) )  <  x )  <->  A. x  e.  RR+  E. j  e.  Z  A. k  e.  ( ZZ>= `  j )
( ( F `  k )  e.  CC  /\ 
A. m  e.  (
ZZ>= `  k ) ( abs `  ( ( F `  k )  -  ( F `  m ) ) )  <  x ) )
Distinct variable groups:    j, k, m, x, F    j, M, k, x    j, Z, k, x
Allowed substitution hints:    M( m)    Z( m)

Proof of Theorem cau3
StepHypRef Expression
1 cau3.1 . . . 4  |-  Z  =  ( ZZ>= `  M )
2 uzssz 9506 . . . 4  |-  ( ZZ>= `  M )  C_  ZZ
31, 2eqsstri 3179 . . 3  |-  Z  C_  ZZ
4 id 19 . . 3  |-  ( ( F `  k )  e.  CC  ->  ( F `  k )  e.  CC )
5 eleq1 2233 . . 3  |-  ( ( F `  k )  =  ( F `  j )  ->  (
( F `  k
)  e.  CC  <->  ( F `  j )  e.  CC ) )
6 eleq1 2233 . . 3  |-  ( ( F `  k )  =  ( F `  m )  ->  (
( F `  k
)  e.  CC  <->  ( F `  m )  e.  CC ) )
7 abssub 11065 . . . 4  |-  ( ( ( F `  j
)  e.  CC  /\  ( F `  k )  e.  CC )  -> 
( abs `  (
( F `  j
)  -  ( F `
 k ) ) )  =  ( abs `  ( ( F `  k )  -  ( F `  j )
) ) )
873adant1 1010 . . 3  |-  ( ( T.  /\  ( F `
 j )  e.  CC  /\  ( F `
 k )  e.  CC )  ->  ( abs `  ( ( F `
 j )  -  ( F `  k ) ) )  =  ( abs `  ( ( F `  k )  -  ( F `  j ) ) ) )
9 abssub 11065 . . . 4  |-  ( ( ( F `  m
)  e.  CC  /\  ( F `  j )  e.  CC )  -> 
( abs `  (
( F `  m
)  -  ( F `
 j ) ) )  =  ( abs `  ( ( F `  j )  -  ( F `  m )
) ) )
1093adant1 1010 . . 3  |-  ( ( T.  /\  ( F `
 m )  e.  CC  /\  ( F `
 j )  e.  CC )  ->  ( abs `  ( ( F `
 m )  -  ( F `  j ) ) )  =  ( abs `  ( ( F `  j )  -  ( F `  m ) ) ) )
11 abs3lem 11075 . . . 4  |-  ( ( ( ( F `  k )  e.  CC  /\  ( F `  m
)  e.  CC )  /\  ( ( F `
 j )  e.  CC  /\  x  e.  RR ) )  -> 
( ( ( abs `  ( ( F `  k )  -  ( F `  j )
) )  <  (
x  /  2 )  /\  ( abs `  (
( F `  j
)  -  ( F `
 m ) ) )  <  ( x  /  2 ) )  ->  ( abs `  (
( F `  k
)  -  ( F `
 m ) ) )  <  x ) )
12113adant1 1010 . . 3  |-  ( ( T.  /\  ( ( F `  k )  e.  CC  /\  ( F `  m )  e.  CC )  /\  (
( F `  j
)  e.  CC  /\  x  e.  RR )
)  ->  ( (
( abs `  (
( F `  k
)  -  ( F `
 j ) ) )  <  ( x  /  2 )  /\  ( abs `  ( ( F `  j )  -  ( F `  m ) ) )  <  ( x  / 
2 ) )  -> 
( abs `  (
( F `  k
)  -  ( F `
 m ) ) )  <  x ) )
133, 4, 5, 6, 8, 10, 12cau3lem 11078 . 2  |-  ( T. 
->  ( A. x  e.  RR+  E. j  e.  Z  A. k  e.  ( ZZ>=
`  j ) ( ( F `  k
)  e.  CC  /\  ( abs `  ( ( F `  k )  -  ( F `  j ) ) )  <  x )  <->  A. x  e.  RR+  E. j  e.  Z  A. k  e.  ( ZZ>= `  j )
( ( F `  k )  e.  CC  /\ 
A. m  e.  (
ZZ>= `  k ) ( abs `  ( ( F `  k )  -  ( F `  m ) ) )  <  x ) ) )
1413mptru 1357 1  |-  ( A. x  e.  RR+  E. j  e.  Z  A. k  e.  ( ZZ>= `  j )
( ( F `  k )  e.  CC  /\  ( abs `  (
( F `  k
)  -  ( F `
 j ) ) )  <  x )  <->  A. x  e.  RR+  E. j  e.  Z  A. k  e.  ( ZZ>= `  j )
( ( F `  k )  e.  CC  /\ 
A. m  e.  (
ZZ>= `  k ) ( abs `  ( ( F `  k )  -  ( F `  m ) ) )  <  x ) )
Colors of variables: wff set class
Syntax hints:    -> wi 4    /\ wa 103    <-> wb 104    = wceq 1348   T. wtru 1349    e. wcel 2141   A.wral 2448   E.wrex 2449   class class class wbr 3989   ` cfv 5198  (class class class)co 5853   CCcc 7772   RRcr 7773    < clt 7954    - cmin 8090    / cdiv 8589   2c2 8929   ZZcz 9212   ZZ>=cuz 9487   RR+crp 9610   abscabs 10961
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 609  ax-in2 610  ax-io 704  ax-5 1440  ax-7 1441  ax-gen 1442  ax-ie1 1486  ax-ie2 1487  ax-8 1497  ax-10 1498  ax-11 1499  ax-i12 1500  ax-bndl 1502  ax-4 1503  ax-17 1519  ax-i9 1523  ax-ial 1527  ax-i5r 1528  ax-13 2143  ax-14 2144  ax-ext 2152  ax-coll 4104  ax-sep 4107  ax-nul 4115  ax-pow 4160  ax-pr 4194  ax-un 4418  ax-setind 4521  ax-iinf 4572  ax-cnex 7865  ax-resscn 7866  ax-1cn 7867  ax-1re 7868  ax-icn 7869  ax-addcl 7870  ax-addrcl 7871  ax-mulcl 7872  ax-mulrcl 7873  ax-addcom 7874  ax-mulcom 7875  ax-addass 7876  ax-mulass 7877  ax-distr 7878  ax-i2m1 7879  ax-0lt1 7880  ax-1rid 7881  ax-0id 7882  ax-rnegex 7883  ax-precex 7884  ax-cnre 7885  ax-pre-ltirr 7886  ax-pre-ltwlin 7887  ax-pre-lttrn 7888  ax-pre-apti 7889  ax-pre-ltadd 7890  ax-pre-mulgt0 7891  ax-pre-mulext 7892  ax-arch 7893  ax-caucvg 7894
This theorem depends on definitions:  df-bi 116  df-dc 830  df-3or 974  df-3an 975  df-tru 1351  df-fal 1354  df-nf 1454  df-sb 1756  df-eu 2022  df-mo 2023  df-clab 2157  df-cleq 2163  df-clel 2166  df-nfc 2301  df-ne 2341  df-nel 2436  df-ral 2453  df-rex 2454  df-reu 2455  df-rmo 2456  df-rab 2457  df-v 2732  df-sbc 2956  df-csb 3050  df-dif 3123  df-un 3125  df-in 3127  df-ss 3134  df-nul 3415  df-if 3527  df-pw 3568  df-sn 3589  df-pr 3590  df-op 3592  df-uni 3797  df-int 3832  df-iun 3875  df-br 3990  df-opab 4051  df-mpt 4052  df-tr 4088  df-id 4278  df-po 4281  df-iso 4282  df-iord 4351  df-on 4353  df-ilim 4354  df-suc 4356  df-iom 4575  df-xp 4617  df-rel 4618  df-cnv 4619  df-co 4620  df-dm 4621  df-rn 4622  df-res 4623  df-ima 4624  df-iota 5160  df-fun 5200  df-fn 5201  df-f 5202  df-f1 5203  df-fo 5204  df-f1o 5205  df-fv 5206  df-riota 5809  df-ov 5856  df-oprab 5857  df-mpo 5858  df-1st 6119  df-2nd 6120  df-recs 6284  df-frec 6370  df-pnf 7956  df-mnf 7957  df-xr 7958  df-ltxr 7959  df-le 7960  df-sub 8092  df-neg 8093  df-reap 8494  df-ap 8501  df-div 8590  df-inn 8879  df-2 8937  df-3 8938  df-4 8939  df-n0 9136  df-z 9213  df-uz 9488  df-rp 9611  df-seqfrec 10402  df-exp 10476  df-cj 10806  df-re 10807  df-im 10808  df-rsqrt 10962  df-abs 10963
This theorem is referenced by:  cau4  11080  serf0  11315
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