Theorem climmul 10776

Description: Limit of the product of two converging sequences. Proposition 12-2.1(c) of [Gleason] p. 168. (Contributed by NM, 27-Dec-2005.) (Proof shortened by Mario Carneiro, 1-Feb-2014.)

Hypotheses

Ref	Expression
climadd.1	|- Z = ( ZZ>= ` M )
climadd.2	|- ( ph -> M e. ZZ )
climadd.4	|- ( ph -> F ~~> A )
climadd.6	|- ( ph -> H e. X )
climadd.7	|- ( ph -> G ~~> B )
climadd.8	|- ( ( ph /\ k e. Z ) -> ( F ` k ) e. CC )
climadd.9	|- ( ( ph /\ k e. Z ) -> ( G ` k ) e. CC )
climmul.h	|- ( ( ph /\ k e. Z ) -> ( H ` k ) = ( ( F ` k ) x. ( G ` k ) ) )

Assertion

Ref	Expression
climmul	|- ( ph -> H ~~> ( A x. B ) )

Distinct variable groups:   B, k   k, F   ph, k   A, k   k, G   k, H   k, M   k, Z

Allowed substitution hint:   X( k)

Proof of Theorem climmul

Dummy variables u v x y z are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		climadd.1	. 2 |- Z = ( ZZ>= ` M )
2		climadd.2	. 2 |- ( ph -> M e. ZZ )
3		climadd.4	. . 3 |- ( ph -> F ~~> A )
4		climcl 10731	. . 3 |- ( F ~~> A -> A e. CC )
5	3, 4	syl 14	. 2 |- ( ph -> A e. CC )
6		climadd.7	. . 3 |- ( ph -> G ~~> B )
7		climcl 10731	. . 3 |- ( G ~~> B -> B e. CC )
8	6, 7	syl 14	. 2 |- ( ph -> B e. CC )
9		mulcl 7530	. . 3 |- ( ( u e. CC /\ v e. CC ) -> ( u x. v ) e. CC )
10	9	adantl 272	. 2 |- ( ( ph /\ ( u e. CC /\ v e. CC ) ) -> ( u x. v ) e. CC )
11		climadd.6	. 2 |- ( ph -> H e. X )
12		simpr 109	. . 3 |- ( ( ph /\ x e. RR+ ) -> x e. RR+ )
13	5	adantr 271	. . 3 |- ( ( ph /\ x e. RR+ ) -> A e. CC )
14	8	adantr 271	. . 3 |- ( ( ph /\ x e. RR+ ) -> B e. CC )
15		mulcn2 10762	. . 3 |- ( ( x e. RR+ /\ A e. CC /\ B e. CC ) -> E. y e. RR+ E. z e. RR+ A. u e. CC A. v e. CC ( ( ( abs ` ( u - A ) ) < y /\ ( abs ` ( v - B ) ) < z ) -> ( abs ` ( ( u x. v ) - ( A x. B ) ) ) < x ) )
16	12, 13, 14, 15	syl3anc 1175	. 2 |- ( ( ph /\ x e. RR+ ) -> E. y e. RR+ E. z e. RR+ A. u e. CC A. v e. CC ( ( ( abs ` ( u - A ) ) < y /\ ( abs ` ( v - B ) ) < z ) -> ( abs ` ( ( u x. v ) - ( A x. B ) ) ) < x ) )
17		climadd.8	. 2 |- ( ( ph /\ k e. Z ) -> ( F ` k ) e. CC )
18		climadd.9	. 2 |- ( ( ph /\ k e. Z ) -> ( G ` k ) e. CC )
19		climmul.h	. 2 |- ( ( ph /\ k e. Z ) -> ( H ` k ) = ( ( F ` k ) x. ( G ` k ) ) )
20	1, 2, 5, 8, 10, 3, 6, 11, 16, 17, 18, 19	climcn2 10759	1 |- ( ph -> H ~~> ( A x. B ) )

Syntax hints:   -> wi 4   /\ wa 103   = wceq 1290   e. wcel 1439   A.wral 2360   E.wrex 2361   class class class wbr 3851   ` cfv 5028  (class class class)co 5666   CCcc 7409   x. cmul 7416   < clt 7583   - cmin 7714   ZZcz 8811   ZZ>=cuz 9080   RR+crp 9195   abscabs 10491   ~~> cli 10727

This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-in1 580  ax-in2 581  ax-io 666  ax-5 1382  ax-7 1383  ax-gen 1384  ax-ie1 1428  ax-ie2 1429  ax-8 1441  ax-10 1442  ax-11 1443  ax-i12 1444  ax-bndl 1445  ax-4 1446  ax-13 1450  ax-14 1451  ax-17 1465  ax-i9 1469  ax-ial 1473  ax-i5r 1474  ax-ext 2071  ax-coll 3960  ax-sep 3963  ax-nul 3971  ax-pow 4015  ax-pr 4045  ax-un 4269  ax-setind 4366  ax-iinf 4416  ax-cnex 7497  ax-resscn 7498  ax-1cn 7499  ax-1re 7500  ax-icn 7501  ax-addcl 7502  ax-addrcl 7503  ax-mulcl 7504  ax-mulrcl 7505  ax-addcom 7506  ax-mulcom 7507  ax-addass 7508  ax-mulass 7509  ax-distr 7510  ax-i2m1 7511  ax-0lt1 7512  ax-1rid 7513  ax-0id 7514  ax-rnegex 7515  ax-precex 7516  ax-cnre 7517  ax-pre-ltirr 7518  ax-pre-ltwlin 7519  ax-pre-lttrn 7520  ax-pre-apti 7521  ax-pre-ltadd 7522  ax-pre-mulgt0 7523  ax-pre-mulext 7524  ax-arch 7525  ax-caucvg 7526

This theorem depends on definitions:  df-bi 116  df-dc 782  df-3or 926  df-3an 927  df-tru 1293  df-fal 1296  df-nf 1396  df-sb 1694  df-eu 1952  df-mo 1953  df-clab 2076  df-cleq 2082  df-clel 2085  df-nfc 2218  df-ne 2257  df-nel 2352  df-ral 2365  df-rex 2366  df-reu 2367  df-rmo 2368  df-rab 2369  df-v 2622  df-sbc 2842  df-csb 2935  df-dif 3002  df-un 3004  df-in 3006  df-ss 3013  df-nul 3288  df-if 3398  df-pw 3435  df-sn 3456  df-pr 3457  df-op 3459  df-uni 3660  df-int 3695  df-iun 3738  df-br 3852  df-opab 3906  df-mpt 3907  df-tr 3943  df-id 4129  df-po 4132  df-iso 4133  df-iord 4202  df-on 4204  df-ilim 4205  df-suc 4207  df-iom 4419  df-xp 4458  df-rel 4459  df-cnv 4460  df-co 4461  df-dm 4462  df-rn 4463  df-res 4464  df-ima 4465  df-iota 4993  df-fun 5030  df-fn 5031  df-f 5032  df-f1 5033  df-fo 5034  df-f1o 5035  df-fv 5036  df-riota 5622  df-ov 5669  df-oprab 5670  df-mpt2 5671  df-1st 5925  df-2nd 5926  df-recs 6084  df-frec 6170  df-pnf 7585  df-mnf 7586  df-xr 7587  df-ltxr 7588  df-le 7589  df-sub 7716  df-neg 7717  df-reap 8113  df-ap 8120  df-div 8201  df-inn 8484  df-2 8542  df-3 8543  df-4 8544  df-n0 8735  df-z 8812  df-uz 9081  df-rp 9196  df-iseq 9914  df-seq3 9915  df-exp 10016  df-cj 10337  df-re 10338  df-im 10339  df-rsqrt 10492  df-abs 10493  df-clim 10728

This theorem is referenced by:  climmulc2  10780