Theorem cau3 11299

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 11172 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

Step	Hyp	Ref	Expression
1		cau3.1	. . . 4 |- Z = ( ZZ>= ` M )
2		uzssz 9640	. . . 4 |- ( ZZ>= ` M ) C_ ZZ
3	1, 2	eqsstri 3216	. . 3 |- Z C_ ZZ
4		id 19	. . 3 |- ( ( F ` k ) e. CC -> ( F ` k ) e. CC )
5		eleq1 2259	. . 3 |- ( ( F ` k ) = ( F ` j ) -> ( ( F ` k ) e. CC <-> ( F ` j ) e. CC ) )
6		eleq1 2259	. . 3 |- ( ( F ` k ) = ( F ` m ) -> ( ( F ` k ) e. CC <-> ( F ` m ) e. CC ) )
7		abssub 11285	. . . 4 |- ( ( ( F ` j ) e. CC /\ ( F ` k ) e. CC ) -> ( abs ` ( ( F ` j ) - ( F ` k ) ) ) = ( abs ` ( ( F ` k ) - ( F ` j ) ) ) )
8	7	3adant1 1017	. . 3 |- ( ( T. /\ ( F ` j ) e. CC /\ ( F ` k ) e. CC ) -> ( abs ` ( ( F ` j ) - ( F ` k ) ) ) = ( abs ` ( ( F ` k ) - ( F ` j ) ) ) )
9		abssub 11285	. . . 4 |- ( ( ( F ` m ) e. CC /\ ( F ` j ) e. CC ) -> ( abs ` ( ( F ` m ) - ( F ` j ) ) ) = ( abs ` ( ( F ` j ) - ( F ` m ) ) ) )
10	9	3adant1 1017	. . 3 |- ( ( T. /\ ( F ` m ) e. CC /\ ( F ` j ) e. CC ) -> ( abs ` ( ( F ` m ) - ( F ` j ) ) ) = ( abs ` ( ( F ` j ) - ( F ` m ) ) ) )
11		abs3lem 11295	. . . 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 ) )
12	11	3adant1 1017	. . 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 ) )
13	3, 4, 5, 6, 8, 10, 12	cau3lem 11298	. 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 ) ) )
14	13	mptru 1373	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 ) )

Syntax hints:   -> wi 4   /\ wa 104   <-> wb 105   = wceq 1364   T. wtru 1365   e. wcel 2167   A.wral 2475   E.wrex 2476   class class class wbr 4034   ` cfv 5259  (class class class)co 5925   CCcc 7896   RRcr 7897   < clt 8080   - cmin 8216   / cdiv 8718   2c2 9060   ZZcz 9345   ZZ>=cuz 9620   RR+crp 9747   abscabs 11181

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 615  ax-in2 616  ax-io 710  ax-5 1461  ax-7 1462  ax-gen 1463  ax-ie1 1507  ax-ie2 1508  ax-8 1518  ax-10 1519  ax-11 1520  ax-i12 1521  ax-bndl 1523  ax-4 1524  ax-17 1540  ax-i9 1544  ax-ial 1548  ax-i5r 1549  ax-13 2169  ax-14 2170  ax-ext 2178  ax-coll 4149  ax-sep 4152  ax-nul 4160  ax-pow 4208  ax-pr 4243  ax-un 4469  ax-setind 4574  ax-iinf 4625  ax-cnex 7989  ax-resscn 7990  ax-1cn 7991  ax-1re 7992  ax-icn 7993  ax-addcl 7994  ax-addrcl 7995  ax-mulcl 7996  ax-mulrcl 7997  ax-addcom 7998  ax-mulcom 7999  ax-addass 8000  ax-mulass 8001  ax-distr 8002  ax-i2m1 8003  ax-0lt1 8004  ax-1rid 8005  ax-0id 8006  ax-rnegex 8007  ax-precex 8008  ax-cnre 8009  ax-pre-ltirr 8010  ax-pre-ltwlin 8011  ax-pre-lttrn 8012  ax-pre-apti 8013  ax-pre-ltadd 8014  ax-pre-mulgt0 8015  ax-pre-mulext 8016  ax-arch 8017  ax-caucvg 8018

This theorem depends on definitions:  df-bi 117  df-dc 836  df-3or 981  df-3an 982  df-tru 1367  df-fal 1370  df-nf 1475  df-sb 1777  df-eu 2048  df-mo 2049  df-clab 2183  df-cleq 2189  df-clel 2192  df-nfc 2328  df-ne 2368  df-nel 2463  df-ral 2480  df-rex 2481  df-reu 2482  df-rmo 2483  df-rab 2484  df-v 2765  df-sbc 2990  df-csb 3085  df-dif 3159  df-un 3161  df-in 3163  df-ss 3170  df-nul 3452  df-if 3563  df-pw 3608  df-sn 3629  df-pr 3630  df-op 3632  df-uni 3841  df-int 3876  df-iun 3919  df-br 4035  df-opab 4096  df-mpt 4097  df-tr 4133  df-id 4329  df-po 4332  df-iso 4333  df-iord 4402  df-on 4404  df-ilim 4405  df-suc 4407  df-iom 4628  df-xp 4670  df-rel 4671  df-cnv 4672  df-co 4673  df-dm 4674  df-rn 4675  df-res 4676  df-ima 4677  df-iota 5220  df-fun 5261  df-fn 5262  df-f 5263  df-f1 5264  df-fo 5265  df-f1o 5266  df-fv 5267  df-riota 5880  df-ov 5928  df-oprab 5929  df-mpo 5930  df-1st 6207  df-2nd 6208  df-recs 6372  df-frec 6458  df-pnf 8082  df-mnf 8083  df-xr 8084  df-ltxr 8085  df-le 8086  df-sub 8218  df-neg 8219  df-reap 8621  df-ap 8628  df-div 8719  df-inn 9010  df-2 9068  df-3 9069  df-4 9070  df-n0 9269  df-z 9346  df-uz 9621  df-rp 9748  df-seqfrec 10559  df-exp 10650  df-cj 11026  df-re 11027  df-im 11028  df-rsqrt 11182  df-abs 11183

This theorem is referenced by:  cau4  11300  serf0  11536