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Theorem prodfrec 27339
Description: The reciprocal of an infinite product. (Contributed by Scott Fenton, 15-Jan-2018.)
Hypotheses
Ref Expression
prodfn0.1  |-  ( ph  ->  N  e.  ( ZZ>= `  M ) )
prodfn0.2  |-  ( (
ph  /\  k  e.  ( M ... N ) )  ->  ( F `  k )  e.  CC )
prodfn0.3  |-  ( (
ph  /\  k  e.  ( M ... N ) )  ->  ( F `  k )  =/=  0
)
prodfrec.4  |-  ( (
ph  /\  k  e.  ( M ... N ) )  ->  ( G `  k )  =  ( 1  /  ( F `
 k ) ) )
Assertion
Ref Expression
prodfrec  |-  ( ph  ->  (  seq M (  x.  ,  G ) `
 N )  =  ( 1  /  (  seq M (  x.  ,  F ) `  N
) ) )
Distinct variable groups:    k, F    ph, k    k, M    k, N    k, G

Proof of Theorem prodfrec
Dummy variables  m  n  x are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 prodfn0.1 . . 3  |-  ( ph  ->  N  e.  ( ZZ>= `  M ) )
2 eluzfz2 11455 . . 3  |-  ( N  e.  ( ZZ>= `  M
)  ->  N  e.  ( M ... N ) )
31, 2syl 16 . 2  |-  ( ph  ->  N  e.  ( M ... N ) )
4 fveq2 5688 . . . . 5  |-  ( m  =  M  ->  (  seq M (  x.  ,  G ) `  m
)  =  (  seq M (  x.  ,  G ) `  M
) )
5 fveq2 5688 . . . . . 6  |-  ( m  =  M  ->  (  seq M (  x.  ,  F ) `  m
)  =  (  seq M (  x.  ,  F ) `  M
) )
65oveq2d 6106 . . . . 5  |-  ( m  =  M  ->  (
1  /  (  seq M (  x.  ,  F ) `  m
) )  =  ( 1  /  (  seq M (  x.  ,  F ) `  M
) ) )
74, 6eqeq12d 2455 . . . 4  |-  ( m  =  M  ->  (
(  seq M (  x.  ,  G ) `  m )  =  ( 1  /  (  seq M (  x.  ,  F ) `  m
) )  <->  (  seq M (  x.  ,  G ) `  M
)  =  ( 1  /  (  seq M
(  x.  ,  F
) `  M )
) ) )
87imbi2d 316 . . 3  |-  ( m  =  M  ->  (
( ph  ->  (  seq M (  x.  ,  G ) `  m
)  =  ( 1  /  (  seq M
(  x.  ,  F
) `  m )
) )  <->  ( ph  ->  (  seq M (  x.  ,  G ) `
 M )  =  ( 1  /  (  seq M (  x.  ,  F ) `  M
) ) ) ) )
9 fveq2 5688 . . . . 5  |-  ( m  =  n  ->  (  seq M (  x.  ,  G ) `  m
)  =  (  seq M (  x.  ,  G ) `  n
) )
10 fveq2 5688 . . . . . 6  |-  ( m  =  n  ->  (  seq M (  x.  ,  F ) `  m
)  =  (  seq M (  x.  ,  F ) `  n
) )
1110oveq2d 6106 . . . . 5  |-  ( m  =  n  ->  (
1  /  (  seq M (  x.  ,  F ) `  m
) )  =  ( 1  /  (  seq M (  x.  ,  F ) `  n
) ) )
129, 11eqeq12d 2455 . . . 4  |-  ( m  =  n  ->  (
(  seq M (  x.  ,  G ) `  m )  =  ( 1  /  (  seq M (  x.  ,  F ) `  m
) )  <->  (  seq M (  x.  ,  G ) `  n
)  =  ( 1  /  (  seq M
(  x.  ,  F
) `  n )
) ) )
1312imbi2d 316 . . 3  |-  ( m  =  n  ->  (
( ph  ->  (  seq M (  x.  ,  G ) `  m
)  =  ( 1  /  (  seq M
(  x.  ,  F
) `  m )
) )  <->  ( ph  ->  (  seq M (  x.  ,  G ) `
 n )  =  ( 1  /  (  seq M (  x.  ,  F ) `  n
) ) ) ) )
14 fveq2 5688 . . . . 5  |-  ( m  =  ( n  + 
1 )  ->  (  seq M (  x.  ,  G ) `  m
)  =  (  seq M (  x.  ,  G ) `  (
n  +  1 ) ) )
15 fveq2 5688 . . . . . 6  |-  ( m  =  ( n  + 
1 )  ->  (  seq M (  x.  ,  F ) `  m
)  =  (  seq M (  x.  ,  F ) `  (
n  +  1 ) ) )
1615oveq2d 6106 . . . . 5  |-  ( m  =  ( n  + 
1 )  ->  (
1  /  (  seq M (  x.  ,  F ) `  m
) )  =  ( 1  /  (  seq M (  x.  ,  F ) `  (
n  +  1 ) ) ) )
1714, 16eqeq12d 2455 . . . 4  |-  ( m  =  ( n  + 
1 )  ->  (
(  seq M (  x.  ,  G ) `  m )  =  ( 1  /  (  seq M (  x.  ,  F ) `  m
) )  <->  (  seq M (  x.  ,  G ) `  (
n  +  1 ) )  =  ( 1  /  (  seq M
(  x.  ,  F
) `  ( n  +  1 ) ) ) ) )
1817imbi2d 316 . . 3  |-  ( m  =  ( n  + 
1 )  ->  (
( ph  ->  (  seq M (  x.  ,  G ) `  m
)  =  ( 1  /  (  seq M
(  x.  ,  F
) `  m )
) )  <->  ( ph  ->  (  seq M (  x.  ,  G ) `
 ( n  + 
1 ) )  =  ( 1  /  (  seq M (  x.  ,  F ) `  (
n  +  1 ) ) ) ) ) )
19 fveq2 5688 . . . . 5  |-  ( m  =  N  ->  (  seq M (  x.  ,  G ) `  m
)  =  (  seq M (  x.  ,  G ) `  N
) )
20 fveq2 5688 . . . . . 6  |-  ( m  =  N  ->  (  seq M (  x.  ,  F ) `  m
)  =  (  seq M (  x.  ,  F ) `  N
) )
2120oveq2d 6106 . . . . 5  |-  ( m  =  N  ->  (
1  /  (  seq M (  x.  ,  F ) `  m
) )  =  ( 1  /  (  seq M (  x.  ,  F ) `  N
) ) )
2219, 21eqeq12d 2455 . . . 4  |-  ( m  =  N  ->  (
(  seq M (  x.  ,  G ) `  m )  =  ( 1  /  (  seq M (  x.  ,  F ) `  m
) )  <->  (  seq M (  x.  ,  G ) `  N
)  =  ( 1  /  (  seq M
(  x.  ,  F
) `  N )
) ) )
2322imbi2d 316 . . 3  |-  ( m  =  N  ->  (
( ph  ->  (  seq M (  x.  ,  G ) `  m
)  =  ( 1  /  (  seq M
(  x.  ,  F
) `  m )
) )  <->  ( ph  ->  (  seq M (  x.  ,  G ) `
 N )  =  ( 1  /  (  seq M (  x.  ,  F ) `  N
) ) ) ) )
24 eluzfz1 11454 . . . . . . 7  |-  ( N  e.  ( ZZ>= `  M
)  ->  M  e.  ( M ... N ) )
251, 24syl 16 . . . . . 6  |-  ( ph  ->  M  e.  ( M ... N ) )
26 fveq2 5688 . . . . . . . . 9  |-  ( k  =  M  ->  ( G `  k )  =  ( G `  M ) )
27 fveq2 5688 . . . . . . . . . 10  |-  ( k  =  M  ->  ( F `  k )  =  ( F `  M ) )
2827oveq2d 6106 . . . . . . . . 9  |-  ( k  =  M  ->  (
1  /  ( F `
 k ) )  =  ( 1  / 
( F `  M
) ) )
2926, 28eqeq12d 2455 . . . . . . . 8  |-  ( k  =  M  ->  (
( G `  k
)  =  ( 1  /  ( F `  k ) )  <->  ( G `  M )  =  ( 1  /  ( F `
 M ) ) ) )
3029imbi2d 316 . . . . . . 7  |-  ( k  =  M  ->  (
( ph  ->  ( G `
 k )  =  ( 1  /  ( F `  k )
) )  <->  ( ph  ->  ( G `  M
)  =  ( 1  /  ( F `  M ) ) ) ) )
31 prodfrec.4 . . . . . . . 8  |-  ( (
ph  /\  k  e.  ( M ... N ) )  ->  ( G `  k )  =  ( 1  /  ( F `
 k ) ) )
3231expcom 435 . . . . . . 7  |-  ( k  e.  ( M ... N )  ->  ( ph  ->  ( G `  k )  =  ( 1  /  ( F `
 k ) ) ) )
3330, 32vtoclga 3033 . . . . . 6  |-  ( M  e.  ( M ... N )  ->  ( ph  ->  ( G `  M )  =  ( 1  /  ( F `
 M ) ) ) )
3425, 33mpcom 36 . . . . 5  |-  ( ph  ->  ( G `  M
)  =  ( 1  /  ( F `  M ) ) )
35 eluzel2 10862 . . . . . . 7  |-  ( N  e.  ( ZZ>= `  M
)  ->  M  e.  ZZ )
361, 35syl 16 . . . . . 6  |-  ( ph  ->  M  e.  ZZ )
37 seq1 11815 . . . . . 6  |-  ( M  e.  ZZ  ->  (  seq M (  x.  ,  G ) `  M
)  =  ( G `
 M ) )
3836, 37syl 16 . . . . 5  |-  ( ph  ->  (  seq M (  x.  ,  G ) `
 M )  =  ( G `  M
) )
39 seq1 11815 . . . . . . 7  |-  ( M  e.  ZZ  ->  (  seq M (  x.  ,  F ) `  M
)  =  ( F `
 M ) )
4036, 39syl 16 . . . . . 6  |-  ( ph  ->  (  seq M (  x.  ,  F ) `
 M )  =  ( F `  M
) )
4140oveq2d 6106 . . . . 5  |-  ( ph  ->  ( 1  /  (  seq M (  x.  ,  F ) `  M
) )  =  ( 1  /  ( F `
 M ) ) )
4234, 38, 413eqtr4d 2483 . . . 4  |-  ( ph  ->  (  seq M (  x.  ,  G ) `
 M )  =  ( 1  /  (  seq M (  x.  ,  F ) `  M
) ) )
4342a1i 11 . . 3  |-  ( N  e.  ( ZZ>= `  M
)  ->  ( ph  ->  (  seq M (  x.  ,  G ) `
 M )  =  ( 1  /  (  seq M (  x.  ,  F ) `  M
) ) ) )
44 oveq1 6097 . . . . . . . . 9  |-  ( (  seq M (  x.  ,  G ) `  n )  =  ( 1  /  (  seq M (  x.  ,  F ) `  n
) )  ->  (
(  seq M (  x.  ,  G ) `  n )  x.  ( G `  ( n  +  1 ) ) )  =  ( ( 1  /  (  seq M (  x.  ,  F ) `  n
) )  x.  ( G `  ( n  +  1 ) ) ) )
45443ad2ant3 1006 . . . . . . . 8  |-  ( (
ph  /\  n  e.  ( M..^ N )  /\  (  seq M (  x.  ,  G ) `  n )  =  ( 1  /  (  seq M (  x.  ,  F ) `  n
) ) )  -> 
( (  seq M
(  x.  ,  G
) `  n )  x.  ( G `  (
n  +  1 ) ) )  =  ( ( 1  /  (  seq M (  x.  ,  F ) `  n
) )  x.  ( G `  ( n  +  1 ) ) ) )
46 fzofzp1 11620 . . . . . . . . . . . . 13  |-  ( n  e.  ( M..^ N
)  ->  ( n  +  1 )  e.  ( M ... N
) )
47 fveq2 5688 . . . . . . . . . . . . . . . 16  |-  ( k  =  ( n  + 
1 )  ->  ( G `  k )  =  ( G `  ( n  +  1
) ) )
48 fveq2 5688 . . . . . . . . . . . . . . . . 17  |-  ( k  =  ( n  + 
1 )  ->  ( F `  k )  =  ( F `  ( n  +  1
) ) )
4948oveq2d 6106 . . . . . . . . . . . . . . . 16  |-  ( k  =  ( n  + 
1 )  ->  (
1  /  ( F `
 k ) )  =  ( 1  / 
( F `  (
n  +  1 ) ) ) )
5047, 49eqeq12d 2455 . . . . . . . . . . . . . . 15  |-  ( k  =  ( n  + 
1 )  ->  (
( G `  k
)  =  ( 1  /  ( F `  k ) )  <->  ( G `  ( n  +  1 ) )  =  ( 1  /  ( F `
 ( n  + 
1 ) ) ) ) )
5150imbi2d 316 . . . . . . . . . . . . . 14  |-  ( k  =  ( n  + 
1 )  ->  (
( ph  ->  ( G `
 k )  =  ( 1  /  ( F `  k )
) )  <->  ( ph  ->  ( G `  (
n  +  1 ) )  =  ( 1  /  ( F `  ( n  +  1
) ) ) ) ) )
5251, 32vtoclga 3033 . . . . . . . . . . . . 13  |-  ( ( n  +  1 )  e.  ( M ... N )  ->  ( ph  ->  ( G `  ( n  +  1
) )  =  ( 1  /  ( F `
 ( n  + 
1 ) ) ) ) )
5346, 52syl 16 . . . . . . . . . . . 12  |-  ( n  e.  ( M..^ N
)  ->  ( ph  ->  ( G `  (
n  +  1 ) )  =  ( 1  /  ( F `  ( n  +  1
) ) ) ) )
5453impcom 430 . . . . . . . . . . 11  |-  ( (
ph  /\  n  e.  ( M..^ N ) )  ->  ( G `  ( n  +  1
) )  =  ( 1  /  ( F `
 ( n  + 
1 ) ) ) )
5554oveq2d 6106 . . . . . . . . . 10  |-  ( (
ph  /\  n  e.  ( M..^ N ) )  ->  ( ( 1  /  (  seq M
(  x.  ,  F
) `  n )
)  x.  ( G `
 ( n  + 
1 ) ) )  =  ( ( 1  /  (  seq M
(  x.  ,  F
) `  n )
)  x.  ( 1  /  ( F `  ( n  +  1
) ) ) ) )
56 ax-1cn 9336 . . . . . . . . . . . . 13  |-  1  e.  CC
5756a1i 11 . . . . . . . . . . . 12  |-  ( (
ph  /\  n  e.  ( M..^ N ) )  ->  1  e.  CC )
58 elfzouz 11553 . . . . . . . . . . . . . 14  |-  ( n  e.  ( M..^ N
)  ->  n  e.  ( ZZ>= `  M )
)
5958adantl 463 . . . . . . . . . . . . 13  |-  ( (
ph  /\  n  e.  ( M..^ N ) )  ->  n  e.  (
ZZ>= `  M ) )
60 elfzouz2 11562 . . . . . . . . . . . . . . . . 17  |-  ( n  e.  ( M..^ N
)  ->  N  e.  ( ZZ>= `  n )
)
61 fzss2 11494 . . . . . . . . . . . . . . . . 17  |-  ( N  e.  ( ZZ>= `  n
)  ->  ( M ... n )  C_  ( M ... N ) )
6260, 61syl 16 . . . . . . . . . . . . . . . 16  |-  ( n  e.  ( M..^ N
)  ->  ( M ... n )  C_  ( M ... N ) )
6362sselda 3353 . . . . . . . . . . . . . . 15  |-  ( ( n  e.  ( M..^ N )  /\  k  e.  ( M ... n
) )  ->  k  e.  ( M ... N
) )
64 prodfn0.2 . . . . . . . . . . . . . . 15  |-  ( (
ph  /\  k  e.  ( M ... N ) )  ->  ( F `  k )  e.  CC )
6563, 64sylan2 471 . . . . . . . . . . . . . 14  |-  ( (
ph  /\  ( n  e.  ( M..^ N )  /\  k  e.  ( M ... n ) ) )  ->  ( F `  k )  e.  CC )
6665anassrs 643 . . . . . . . . . . . . 13  |-  ( ( ( ph  /\  n  e.  ( M..^ N ) )  /\  k  e.  ( M ... n
) )  ->  ( F `  k )  e.  CC )
67 mulcl 9362 . . . . . . . . . . . . . 14  |-  ( ( k  e.  CC  /\  x  e.  CC )  ->  ( k  x.  x
)  e.  CC )
6867adantl 463 . . . . . . . . . . . . 13  |-  ( ( ( ph  /\  n  e.  ( M..^ N ) )  /\  ( k  e.  CC  /\  x  e.  CC ) )  -> 
( k  x.  x
)  e.  CC )
6959, 66, 68seqcl 11822 . . . . . . . . . . . 12  |-  ( (
ph  /\  n  e.  ( M..^ N ) )  ->  (  seq M
(  x.  ,  F
) `  n )  e.  CC )
7048eleq1d 2507 . . . . . . . . . . . . . . . 16  |-  ( k  =  ( n  + 
1 )  ->  (
( F `  k
)  e.  CC  <->  ( F `  ( n  +  1 ) )  e.  CC ) )
7170imbi2d 316 . . . . . . . . . . . . . . 15  |-  ( k  =  ( n  + 
1 )  ->  (
( ph  ->  ( F `
 k )  e.  CC )  <->  ( ph  ->  ( F `  (
n  +  1 ) )  e.  CC ) ) )
7264expcom 435 . . . . . . . . . . . . . . 15  |-  ( k  e.  ( M ... N )  ->  ( ph  ->  ( F `  k )  e.  CC ) )
7371, 72vtoclga 3033 . . . . . . . . . . . . . 14  |-  ( ( n  +  1 )  e.  ( M ... N )  ->  ( ph  ->  ( F `  ( n  +  1
) )  e.  CC ) )
7446, 73syl 16 . . . . . . . . . . . . 13  |-  ( n  e.  ( M..^ N
)  ->  ( ph  ->  ( F `  (
n  +  1 ) )  e.  CC ) )
7574impcom 430 . . . . . . . . . . . 12  |-  ( (
ph  /\  n  e.  ( M..^ N ) )  ->  ( F `  ( n  +  1
) )  e.  CC )
76 prodfn0.3 . . . . . . . . . . . . . . 15  |-  ( (
ph  /\  k  e.  ( M ... N ) )  ->  ( F `  k )  =/=  0
)
7763, 76sylan2 471 . . . . . . . . . . . . . 14  |-  ( (
ph  /\  ( n  e.  ( M..^ N )  /\  k  e.  ( M ... n ) ) )  ->  ( F `  k )  =/=  0 )
7877anassrs 643 . . . . . . . . . . . . 13  |-  ( ( ( ph  /\  n  e.  ( M..^ N ) )  /\  k  e.  ( M ... n
) )  ->  ( F `  k )  =/=  0 )
7959, 66, 78prodfn0 27338 . . . . . . . . . . . 12  |-  ( (
ph  /\  n  e.  ( M..^ N ) )  ->  (  seq M
(  x.  ,  F
) `  n )  =/=  0 )
8048neeq1d 2619 . . . . . . . . . . . . . . . 16  |-  ( k  =  ( n  + 
1 )  ->  (
( F `  k
)  =/=  0  <->  ( F `  ( n  +  1 ) )  =/=  0 ) )
8180imbi2d 316 . . . . . . . . . . . . . . 15  |-  ( k  =  ( n  + 
1 )  ->  (
( ph  ->  ( F `
 k )  =/=  0 )  <->  ( ph  ->  ( F `  (
n  +  1 ) )  =/=  0 ) ) )
8276expcom 435 . . . . . . . . . . . . . . 15  |-  ( k  e.  ( M ... N )  ->  ( ph  ->  ( F `  k )  =/=  0
) )
8381, 82vtoclga 3033 . . . . . . . . . . . . . 14  |-  ( ( n  +  1 )  e.  ( M ... N )  ->  ( ph  ->  ( F `  ( n  +  1
) )  =/=  0
) )
8446, 83syl 16 . . . . . . . . . . . . 13  |-  ( n  e.  ( M..^ N
)  ->  ( ph  ->  ( F `  (
n  +  1 ) )  =/=  0 ) )
8584impcom 430 . . . . . . . . . . . 12  |-  ( (
ph  /\  n  e.  ( M..^ N ) )  ->  ( F `  ( n  +  1
) )  =/=  0
)
8657, 69, 57, 75, 79, 85divmuldivd 10144 . . . . . . . . . . 11  |-  ( (
ph  /\  n  e.  ( M..^ N ) )  ->  ( ( 1  /  (  seq M
(  x.  ,  F
) `  n )
)  x.  ( 1  /  ( F `  ( n  +  1
) ) ) )  =  ( ( 1  x.  1 )  / 
( (  seq M
(  x.  ,  F
) `  n )  x.  ( F `  (
n  +  1 ) ) ) ) )
87 1t1e1 10465 . . . . . . . . . . . 12  |-  ( 1  x.  1 )  =  1
8887oveq1i 6100 . . . . . . . . . . 11  |-  ( ( 1  x.  1 )  /  ( (  seq M (  x.  ,  F ) `  n
)  x.  ( F `
 ( n  + 
1 ) ) ) )  =  ( 1  /  ( (  seq M (  x.  ,  F ) `  n
)  x.  ( F `
 ( n  + 
1 ) ) ) )
8986, 88syl6eq 2489 . . . . . . . . . 10  |-  ( (
ph  /\  n  e.  ( M..^ N ) )  ->  ( ( 1  /  (  seq M
(  x.  ,  F
) `  n )
)  x.  ( 1  /  ( F `  ( n  +  1
) ) ) )  =  ( 1  / 
( (  seq M
(  x.  ,  F
) `  n )  x.  ( F `  (
n  +  1 ) ) ) ) )
9055, 89eqtrd 2473 . . . . . . . . 9  |-  ( (
ph  /\  n  e.  ( M..^ N ) )  ->  ( ( 1  /  (  seq M
(  x.  ,  F
) `  n )
)  x.  ( G `
 ( n  + 
1 ) ) )  =  ( 1  / 
( (  seq M
(  x.  ,  F
) `  n )  x.  ( F `  (
n  +  1 ) ) ) ) )
91903adant3 1003 . . . . . . . 8  |-  ( (
ph  /\  n  e.  ( M..^ N )  /\  (  seq M (  x.  ,  G ) `  n )  =  ( 1  /  (  seq M (  x.  ,  F ) `  n
) ) )  -> 
( ( 1  / 
(  seq M (  x.  ,  F ) `  n ) )  x.  ( G `  (
n  +  1 ) ) )  =  ( 1  /  ( (  seq M (  x.  ,  F ) `  n )  x.  ( F `  ( n  +  1 ) ) ) ) )
9245, 91eqtrd 2473 . . . . . . 7  |-  ( (
ph  /\  n  e.  ( M..^ N )  /\  (  seq M (  x.  ,  G ) `  n )  =  ( 1  /  (  seq M (  x.  ,  F ) `  n
) ) )  -> 
( (  seq M
(  x.  ,  G
) `  n )  x.  ( G `  (
n  +  1 ) ) )  =  ( 1  /  ( (  seq M (  x.  ,  F ) `  n )  x.  ( F `  ( n  +  1 ) ) ) ) )
93 seqp1 11817 . . . . . . . . 9  |-  ( n  e.  ( ZZ>= `  M
)  ->  (  seq M (  x.  ,  G ) `  (
n  +  1 ) )  =  ( (  seq M (  x.  ,  G ) `  n )  x.  ( G `  ( n  +  1 ) ) ) )
9458, 93syl 16 . . . . . . . 8  |-  ( n  e.  ( M..^ N
)  ->  (  seq M (  x.  ,  G ) `  (
n  +  1 ) )  =  ( (  seq M (  x.  ,  G ) `  n )  x.  ( G `  ( n  +  1 ) ) ) )
95943ad2ant2 1005 . . . . . . 7  |-  ( (
ph  /\  n  e.  ( M..^ N )  /\  (  seq M (  x.  ,  G ) `  n )  =  ( 1  /  (  seq M (  x.  ,  F ) `  n
) ) )  -> 
(  seq M (  x.  ,  G ) `  ( n  +  1
) )  =  ( (  seq M (  x.  ,  G ) `
 n )  x.  ( G `  (
n  +  1 ) ) ) )
96 seqp1 11817 . . . . . . . . . 10  |-  ( n  e.  ( ZZ>= `  M
)  ->  (  seq M (  x.  ,  F ) `  (
n  +  1 ) )  =  ( (  seq M (  x.  ,  F ) `  n )  x.  ( F `  ( n  +  1 ) ) ) )
9758, 96syl 16 . . . . . . . . 9  |-  ( n  e.  ( M..^ N
)  ->  (  seq M (  x.  ,  F ) `  (
n  +  1 ) )  =  ( (  seq M (  x.  ,  F ) `  n )  x.  ( F `  ( n  +  1 ) ) ) )
9897oveq2d 6106 . . . . . . . 8  |-  ( n  e.  ( M..^ N
)  ->  ( 1  /  (  seq M
(  x.  ,  F
) `  ( n  +  1 ) ) )  =  ( 1  /  ( (  seq M (  x.  ,  F ) `  n
)  x.  ( F `
 ( n  + 
1 ) ) ) ) )
99983ad2ant2 1005 . . . . . . 7  |-  ( (
ph  /\  n  e.  ( M..^ N )  /\  (  seq M (  x.  ,  G ) `  n )  =  ( 1  /  (  seq M (  x.  ,  F ) `  n
) ) )  -> 
( 1  /  (  seq M (  x.  ,  F ) `  (
n  +  1 ) ) )  =  ( 1  /  ( (  seq M (  x.  ,  F ) `  n )  x.  ( F `  ( n  +  1 ) ) ) ) )
10092, 95, 993eqtr4d 2483 . . . . . 6  |-  ( (
ph  /\  n  e.  ( M..^ N )  /\  (  seq M (  x.  ,  G ) `  n )  =  ( 1  /  (  seq M (  x.  ,  F ) `  n
) ) )  -> 
(  seq M (  x.  ,  G ) `  ( n  +  1
) )  =  ( 1  /  (  seq M (  x.  ,  F ) `  (
n  +  1 ) ) ) )
1011003exp 1181 . . . . 5  |-  ( ph  ->  ( n  e.  ( M..^ N )  -> 
( (  seq M
(  x.  ,  G
) `  n )  =  ( 1  / 
(  seq M (  x.  ,  F ) `  n ) )  -> 
(  seq M (  x.  ,  G ) `  ( n  +  1
) )  =  ( 1  /  (  seq M (  x.  ,  F ) `  (
n  +  1 ) ) ) ) ) )
102101com12 31 . . . 4  |-  ( n  e.  ( M..^ N
)  ->  ( ph  ->  ( (  seq M
(  x.  ,  G
) `  n )  =  ( 1  / 
(  seq M (  x.  ,  F ) `  n ) )  -> 
(  seq M (  x.  ,  G ) `  ( n  +  1
) )  =  ( 1  /  (  seq M (  x.  ,  F ) `  (
n  +  1 ) ) ) ) ) )
103102a2d 26 . . 3  |-  ( n  e.  ( M..^ N
)  ->  ( ( ph  ->  (  seq M
(  x.  ,  G
) `  n )  =  ( 1  / 
(  seq M (  x.  ,  F ) `  n ) ) )  ->  ( ph  ->  (  seq M (  x.  ,  G ) `  ( n  +  1
) )  =  ( 1  /  (  seq M (  x.  ,  F ) `  (
n  +  1 ) ) ) ) ) )
1048, 13, 18, 23, 43, 103fzind2 11633 . 2  |-  ( N  e.  ( M ... N )  ->  ( ph  ->  (  seq M
(  x.  ,  G
) `  N )  =  ( 1  / 
(  seq M (  x.  ,  F ) `  N ) ) ) )
1053, 104mpcom 36 1  |-  ( ph  ->  (  seq M (  x.  ,  G ) `
 N )  =  ( 1  /  (  seq M (  x.  ,  F ) `  N
) ) )
Colors of variables: wff setvar class
Syntax hints:    -> wi 4    /\ wa 369    /\ w3a 960    = wceq 1364    e. wcel 1761    =/= wne 2604    C_ wss 3325   ` cfv 5415  (class class class)co 6090   CCcc 9276   0cc0 9278   1c1 9279    + caddc 9281    x. cmul 9283    / cdiv 9989   ZZcz 10642   ZZ>=cuz 10857   ...cfz 11433  ..^cfzo 11544    seqcseq 11802
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1596  ax-4 1607  ax-5 1675  ax-6 1713  ax-7 1733  ax-8 1763  ax-9 1765  ax-10 1780  ax-11 1785  ax-12 1797  ax-13 1948  ax-ext 2422  ax-sep 4410  ax-nul 4418  ax-pow 4467  ax-pr 4528  ax-un 6371  ax-cnex 9334  ax-resscn 9335  ax-1cn 9336  ax-icn 9337  ax-addcl 9338  ax-addrcl 9339  ax-mulcl 9340  ax-mulrcl 9341  ax-mulcom 9342  ax-addass 9343  ax-mulass 9344  ax-distr 9345  ax-i2m1 9346  ax-1ne0 9347  ax-1rid 9348  ax-rnegex 9349  ax-rrecex 9350  ax-cnre 9351  ax-pre-lttri 9352  ax-pre-lttrn 9353  ax-pre-ltadd 9354  ax-pre-mulgt0 9355
This theorem depends on definitions:  df-bi 185  df-or 370  df-an 371  df-3or 961  df-3an 962  df-tru 1367  df-ex 1592  df-nf 1595  df-sb 1706  df-eu 2261  df-mo 2262  df-clab 2428  df-cleq 2434  df-clel 2437  df-nfc 2566  df-ne 2606  df-nel 2607  df-ral 2718  df-rex 2719  df-reu 2720  df-rmo 2721  df-rab 2722  df-v 2972  df-sbc 3184  df-csb 3286  df-dif 3328  df-un 3330  df-in 3332  df-ss 3339  df-pss 3341  df-nul 3635  df-if 3789  df-pw 3859  df-sn 3875  df-pr 3877  df-tp 3879  df-op 3881  df-uni 4089  df-iun 4170  df-br 4290  df-opab 4348  df-mpt 4349  df-tr 4383  df-eprel 4628  df-id 4632  df-po 4637  df-so 4638  df-fr 4675  df-we 4677  df-ord 4718  df-on 4719  df-lim 4720  df-suc 4721  df-xp 4842  df-rel 4843  df-cnv 4844  df-co 4845  df-dm 4846  df-rn 4847  df-res 4848  df-ima 4849  df-iota 5378  df-fun 5417  df-fn 5418  df-f 5419  df-f1 5420  df-fo 5421  df-f1o 5422  df-fv 5423  df-riota 6049  df-ov 6093  df-oprab 6094  df-mpt2 6095  df-om 6476  df-1st 6576  df-2nd 6577  df-recs 6828  df-rdg 6862  df-er 7097  df-en 7307  df-dom 7308  df-sdom 7309  df-pnf 9416  df-mnf 9417  df-xr 9418  df-ltxr 9419  df-le 9420  df-sub 9593  df-neg 9594  df-div 9990  df-nn 10319  df-n0 10576  df-z 10643  df-uz 10858  df-fz 11434  df-fzo 11545  df-seq 11803
This theorem is referenced by:  prodfdiv  27340
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