ILE Home Intuitionistic Logic Explorer < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  ILE Home  >  Th. List  >  fprodabs Unicode version

Theorem fprodabs 11557
Description: The absolute value of a finite product. (Contributed by Scott Fenton, 25-Dec-2017.)
Hypotheses
Ref Expression
fprodabs.1  |-  Z  =  ( ZZ>= `  M )
fprodabs.2  |-  ( ph  ->  N  e.  Z )
fprodabs.3  |-  ( (
ph  /\  k  e.  Z )  ->  A  e.  CC )
Assertion
Ref Expression
fprodabs  |-  ( ph  ->  ( abs `  prod_ k  e.  ( M ... N ) A )  =  prod_ k  e.  ( M ... N ) ( abs `  A
) )
Distinct variable groups:    k, M    k, N    k, Z    ph, k
Allowed substitution hint:    A( k)

Proof of Theorem fprodabs
Dummy variables  a  n are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 fprodabs.2 . . 3  |-  ( ph  ->  N  e.  Z )
2 fprodabs.1 . . 3  |-  Z  =  ( ZZ>= `  M )
31, 2eleqtrdi 2259 . 2  |-  ( ph  ->  N  e.  ( ZZ>= `  M ) )
4 oveq2 5850 . . . . . . 7  |-  ( a  =  M  ->  ( M ... a )  =  ( M ... M
) )
54prodeq1d 11505 . . . . . 6  |-  ( a  =  M  ->  prod_ k  e.  ( M ... a ) A  = 
prod_ k  e.  ( M ... M ) A )
65fveq2d 5490 . . . . 5  |-  ( a  =  M  ->  ( abs `  prod_ k  e.  ( M ... a ) A )  =  ( abs `  prod_ k  e.  ( M ... M
) A ) )
74prodeq1d 11505 . . . . 5  |-  ( a  =  M  ->  prod_ k  e.  ( M ... a ) ( abs `  A )  =  prod_ k  e.  ( M ... M ) ( abs `  A ) )
86, 7eqeq12d 2180 . . . 4  |-  ( a  =  M  ->  (
( abs `  prod_ k  e.  ( M ... a ) A )  =  prod_ k  e.  ( M ... a ) ( abs `  A
)  <->  ( abs `  prod_ k  e.  ( M ... M ) A )  =  prod_ k  e.  ( M ... M ) ( abs `  A
) ) )
98imbi2d 229 . . 3  |-  ( a  =  M  ->  (
( ph  ->  ( abs `  prod_ k  e.  ( M ... a ) A )  =  prod_ k  e.  ( M ... a ) ( abs `  A ) )  <->  ( ph  ->  ( abs `  prod_ k  e.  ( M ... M ) A )  =  prod_ k  e.  ( M ... M ) ( abs `  A
) ) ) )
10 oveq2 5850 . . . . . . 7  |-  ( a  =  n  ->  ( M ... a )  =  ( M ... n
) )
1110prodeq1d 11505 . . . . . 6  |-  ( a  =  n  ->  prod_ k  e.  ( M ... a ) A  = 
prod_ k  e.  ( M ... n ) A )
1211fveq2d 5490 . . . . 5  |-  ( a  =  n  ->  ( abs `  prod_ k  e.  ( M ... a ) A )  =  ( abs `  prod_ k  e.  ( M ... n
) A ) )
1310prodeq1d 11505 . . . . 5  |-  ( a  =  n  ->  prod_ k  e.  ( M ... a ) ( abs `  A )  =  prod_ k  e.  ( M ... n ) ( abs `  A ) )
1412, 13eqeq12d 2180 . . . 4  |-  ( a  =  n  ->  (
( abs `  prod_ k  e.  ( M ... a ) A )  =  prod_ k  e.  ( M ... a ) ( abs `  A
)  <->  ( abs `  prod_ k  e.  ( M ... n ) A )  =  prod_ k  e.  ( M ... n ) ( abs `  A
) ) )
1514imbi2d 229 . . 3  |-  ( a  =  n  ->  (
( ph  ->  ( abs `  prod_ k  e.  ( M ... a ) A )  =  prod_ k  e.  ( M ... a ) ( abs `  A ) )  <->  ( ph  ->  ( abs `  prod_ k  e.  ( M ... n ) A )  =  prod_ k  e.  ( M ... n ) ( abs `  A
) ) ) )
16 oveq2 5850 . . . . . . 7  |-  ( a  =  ( n  + 
1 )  ->  ( M ... a )  =  ( M ... (
n  +  1 ) ) )
1716prodeq1d 11505 . . . . . 6  |-  ( a  =  ( n  + 
1 )  ->  prod_ k  e.  ( M ... a ) A  = 
prod_ k  e.  ( M ... ( n  + 
1 ) ) A )
1817fveq2d 5490 . . . . 5  |-  ( a  =  ( n  + 
1 )  ->  ( abs `  prod_ k  e.  ( M ... a ) A )  =  ( abs `  prod_ k  e.  ( M ... (
n  +  1 ) ) A ) )
1916prodeq1d 11505 . . . . 5  |-  ( a  =  ( n  + 
1 )  ->  prod_ k  e.  ( M ... a ) ( abs `  A )  =  prod_ k  e.  ( M ... ( n  +  1
) ) ( abs `  A ) )
2018, 19eqeq12d 2180 . . . 4  |-  ( a  =  ( n  + 
1 )  ->  (
( abs `  prod_ k  e.  ( M ... a ) A )  =  prod_ k  e.  ( M ... a ) ( abs `  A
)  <->  ( abs `  prod_ k  e.  ( M ... ( n  +  1
) ) A )  =  prod_ k  e.  ( M ... ( n  +  1 ) ) ( abs `  A
) ) )
2120imbi2d 229 . . 3  |-  ( a  =  ( n  + 
1 )  ->  (
( ph  ->  ( abs `  prod_ k  e.  ( M ... a ) A )  =  prod_ k  e.  ( M ... a ) ( abs `  A ) )  <->  ( ph  ->  ( abs `  prod_ k  e.  ( M ... ( n  +  1
) ) A )  =  prod_ k  e.  ( M ... ( n  +  1 ) ) ( abs `  A
) ) ) )
22 oveq2 5850 . . . . . . 7  |-  ( a  =  N  ->  ( M ... a )  =  ( M ... N
) )
2322prodeq1d 11505 . . . . . 6  |-  ( a  =  N  ->  prod_ k  e.  ( M ... a ) A  = 
prod_ k  e.  ( M ... N ) A )
2423fveq2d 5490 . . . . 5  |-  ( a  =  N  ->  ( abs `  prod_ k  e.  ( M ... a ) A )  =  ( abs `  prod_ k  e.  ( M ... N
) A ) )
2522prodeq1d 11505 . . . . 5  |-  ( a  =  N  ->  prod_ k  e.  ( M ... a ) ( abs `  A )  =  prod_ k  e.  ( M ... N ) ( abs `  A ) )
2624, 25eqeq12d 2180 . . . 4  |-  ( a  =  N  ->  (
( abs `  prod_ k  e.  ( M ... a ) A )  =  prod_ k  e.  ( M ... a ) ( abs `  A
)  <->  ( abs `  prod_ k  e.  ( M ... N ) A )  =  prod_ k  e.  ( M ... N ) ( abs `  A
) ) )
2726imbi2d 229 . . 3  |-  ( a  =  N  ->  (
( ph  ->  ( abs `  prod_ k  e.  ( M ... a ) A )  =  prod_ k  e.  ( M ... a ) ( abs `  A ) )  <->  ( ph  ->  ( abs `  prod_ k  e.  ( M ... N ) A )  =  prod_ k  e.  ( M ... N ) ( abs `  A
) ) ) )
28 csbfv2g 5523 . . . . . 6  |-  ( M  e.  ZZ  ->  [_ M  /  k ]_ ( abs `  A )  =  ( abs `  [_ M  /  k ]_ A
) )
2928adantl 275 . . . . 5  |-  ( (
ph  /\  M  e.  ZZ )  ->  [_ M  /  k ]_ ( abs `  A )  =  ( abs `  [_ M  /  k ]_ A
) )
30 fzsn 10001 . . . . . . . 8  |-  ( M  e.  ZZ  ->  ( M ... M )  =  { M } )
3130adantl 275 . . . . . . 7  |-  ( (
ph  /\  M  e.  ZZ )  ->  ( M ... M )  =  { M } )
3231prodeq1d 11505 . . . . . 6  |-  ( (
ph  /\  M  e.  ZZ )  ->  prod_ k  e.  ( M ... M
) ( abs `  A
)  =  prod_ k  e.  { M }  ( abs `  A ) )
33 simpr 109 . . . . . . 7  |-  ( (
ph  /\  M  e.  ZZ )  ->  M  e.  ZZ )
34 uzid 9480 . . . . . . . . . . . 12  |-  ( M  e.  ZZ  ->  M  e.  ( ZZ>= `  M )
)
3534, 2eleqtrrdi 2260 . . . . . . . . . . 11  |-  ( M  e.  ZZ  ->  M  e.  Z )
36 fprodabs.3 . . . . . . . . . . . . 13  |-  ( (
ph  /\  k  e.  Z )  ->  A  e.  CC )
3736ralrimiva 2539 . . . . . . . . . . . 12  |-  ( ph  ->  A. k  e.  Z  A  e.  CC )
38 nfcsb1v 3078 . . . . . . . . . . . . . 14  |-  F/_ k [_ M  /  k ]_ A
3938nfel1 2319 . . . . . . . . . . . . 13  |-  F/ k
[_ M  /  k ]_ A  e.  CC
40 csbeq1a 3054 . . . . . . . . . . . . . 14  |-  ( k  =  M  ->  A  =  [_ M  /  k ]_ A )
4140eleq1d 2235 . . . . . . . . . . . . 13  |-  ( k  =  M  ->  ( A  e.  CC  <->  [_ M  / 
k ]_ A  e.  CC ) )
4239, 41rspc 2824 . . . . . . . . . . . 12  |-  ( M  e.  Z  ->  ( A. k  e.  Z  A  e.  CC  ->  [_ M  /  k ]_ A  e.  CC )
)
4337, 42mpan9 279 . . . . . . . . . . 11  |-  ( (
ph  /\  M  e.  Z )  ->  [_ M  /  k ]_ A  e.  CC )
4435, 43sylan2 284 . . . . . . . . . 10  |-  ( (
ph  /\  M  e.  ZZ )  ->  [_ M  /  k ]_ A  e.  CC )
4544abscld 11123 . . . . . . . . 9  |-  ( (
ph  /\  M  e.  ZZ )  ->  ( abs `  [_ M  /  k ]_ A )  e.  RR )
4645recnd 7927 . . . . . . . 8  |-  ( (
ph  /\  M  e.  ZZ )  ->  ( abs `  [_ M  /  k ]_ A )  e.  CC )
4729, 46eqeltrd 2243 . . . . . . 7  |-  ( (
ph  /\  M  e.  ZZ )  ->  [_ M  /  k ]_ ( abs `  A )  e.  CC )
48 prodsns 11544 . . . . . . 7  |-  ( ( M  e.  ZZ  /\  [_ M  /  k ]_ ( abs `  A )  e.  CC )  ->  prod_ k  e.  { M }  ( abs `  A
)  =  [_ M  /  k ]_ ( abs `  A ) )
4933, 47, 48syl2anc 409 . . . . . 6  |-  ( (
ph  /\  M  e.  ZZ )  ->  prod_ k  e.  { M }  ( abs `  A )  = 
[_ M  /  k ]_ ( abs `  A
) )
5032, 49eqtrd 2198 . . . . 5  |-  ( (
ph  /\  M  e.  ZZ )  ->  prod_ k  e.  ( M ... M
) ( abs `  A
)  =  [_ M  /  k ]_ ( abs `  A ) )
5130prodeq1d 11505 . . . . . . . 8  |-  ( M  e.  ZZ  ->  prod_ k  e.  ( M ... M ) A  = 
prod_ k  e.  { M } A )
5251adantl 275 . . . . . . 7  |-  ( (
ph  /\  M  e.  ZZ )  ->  prod_ k  e.  ( M ... M
) A  =  prod_ k  e.  { M } A )
53 prodsns 11544 . . . . . . . 8  |-  ( ( M  e.  ZZ  /\  [_ M  /  k ]_ A  e.  CC )  ->  prod_ k  e.  { M } A  =  [_ M  /  k ]_ A
)
5433, 44, 53syl2anc 409 . . . . . . 7  |-  ( (
ph  /\  M  e.  ZZ )  ->  prod_ k  e.  { M } A  =  [_ M  /  k ]_ A )
5552, 54eqtrd 2198 . . . . . 6  |-  ( (
ph  /\  M  e.  ZZ )  ->  prod_ k  e.  ( M ... M
) A  =  [_ M  /  k ]_ A
)
5655fveq2d 5490 . . . . 5  |-  ( (
ph  /\  M  e.  ZZ )  ->  ( abs `  prod_ k  e.  ( M ... M ) A )  =  ( abs `  [_ M  /  k ]_ A
) )
5729, 50, 563eqtr4rd 2209 . . . 4  |-  ( (
ph  /\  M  e.  ZZ )  ->  ( abs `  prod_ k  e.  ( M ... M ) A )  =  prod_ k  e.  ( M ... M ) ( abs `  A ) )
5857expcom 115 . . 3  |-  ( M  e.  ZZ  ->  ( ph  ->  ( abs `  prod_ k  e.  ( M ... M ) A )  =  prod_ k  e.  ( M ... M ) ( abs `  A
) ) )
59 simp3 989 . . . . . . . 8  |-  ( (
ph  /\  n  e.  ( ZZ>= `  M )  /\  ( abs `  prod_ k  e.  ( M ... n ) A )  =  prod_ k  e.  ( M ... n ) ( abs `  A
) )  ->  ( abs `  prod_ k  e.  ( M ... n ) A )  =  prod_ k  e.  ( M ... n ) ( abs `  A ) )
60 peano2uz 9521 . . . . . . . . . . 11  |-  ( n  e.  ( ZZ>= `  M
)  ->  ( n  +  1 )  e.  ( ZZ>= `  M )
)
61 csbfv2g 5523 . . . . . . . . . . 11  |-  ( ( n  +  1 )  e.  ( ZZ>= `  M
)  ->  [_ ( n  +  1 )  / 
k ]_ ( abs `  A
)  =  ( abs `  [_ ( n  + 
1 )  /  k ]_ A ) )
6260, 61syl 14 . . . . . . . . . 10  |-  ( n  e.  ( ZZ>= `  M
)  ->  [_ ( n  +  1 )  / 
k ]_ ( abs `  A
)  =  ( abs `  [_ ( n  + 
1 )  /  k ]_ A ) )
6362eqcomd 2171 . . . . . . . . 9  |-  ( n  e.  ( ZZ>= `  M
)  ->  ( abs ` 
[_ ( n  + 
1 )  /  k ]_ A )  =  [_ ( n  +  1
)  /  k ]_ ( abs `  A ) )
64633ad2ant2 1009 . . . . . . . 8  |-  ( (
ph  /\  n  e.  ( ZZ>= `  M )  /\  ( abs `  prod_ k  e.  ( M ... n ) A )  =  prod_ k  e.  ( M ... n ) ( abs `  A
) )  ->  ( abs `  [_ ( n  +  1 )  / 
k ]_ A )  = 
[_ ( n  + 
1 )  /  k ]_ ( abs `  A
) )
6559, 64oveq12d 5860 . . . . . . 7  |-  ( (
ph  /\  n  e.  ( ZZ>= `  M )  /\  ( abs `  prod_ k  e.  ( M ... n ) A )  =  prod_ k  e.  ( M ... n ) ( abs `  A
) )  ->  (
( abs `  prod_ k  e.  ( M ... n ) A )  x.  ( abs `  [_ (
n  +  1 )  /  k ]_ A
) )  =  (
prod_ k  e.  ( M ... n ) ( abs `  A )  x.  [_ ( n  +  1 )  / 
k ]_ ( abs `  A
) ) )
66 simpr 109 . . . . . . . . . . 11  |-  ( (
ph  /\  n  e.  ( ZZ>= `  M )
)  ->  n  e.  ( ZZ>= `  M )
)
67 elfzuz 9956 . . . . . . . . . . . . . 14  |-  ( k  e.  ( M ... ( n  +  1
) )  ->  k  e.  ( ZZ>= `  M )
)
6867, 2eleqtrrdi 2260 . . . . . . . . . . . . 13  |-  ( k  e.  ( M ... ( n  +  1
) )  ->  k  e.  Z )
6968, 36sylan2 284 . . . . . . . . . . . 12  |-  ( (
ph  /\  k  e.  ( M ... ( n  +  1 ) ) )  ->  A  e.  CC )
7069adantlr 469 . . . . . . . . . . 11  |-  ( ( ( ph  /\  n  e.  ( ZZ>= `  M )
)  /\  k  e.  ( M ... ( n  +  1 ) ) )  ->  A  e.  CC )
7166, 70fprodp1s 11543 . . . . . . . . . 10  |-  ( (
ph  /\  n  e.  ( ZZ>= `  M )
)  ->  prod_ k  e.  ( M ... (
n  +  1 ) ) A  =  (
prod_ k  e.  ( M ... n ) A  x.  [_ ( n  +  1 )  / 
k ]_ A ) )
7271fveq2d 5490 . . . . . . . . 9  |-  ( (
ph  /\  n  e.  ( ZZ>= `  M )
)  ->  ( abs ` 
prod_ k  e.  ( M ... ( n  + 
1 ) ) A )  =  ( abs `  ( prod_ k  e.  ( M ... n ) A  x.  [_ (
n  +  1 )  /  k ]_ A
) ) )
73 eluzel2 9471 . . . . . . . . . . . . 13  |-  ( n  e.  ( ZZ>= `  M
)  ->  M  e.  ZZ )
7473adantl 275 . . . . . . . . . . . 12  |-  ( (
ph  /\  n  e.  ( ZZ>= `  M )
)  ->  M  e.  ZZ )
75 eluzelz 9475 . . . . . . . . . . . . 13  |-  ( n  e.  ( ZZ>= `  M
)  ->  n  e.  ZZ )
7675adantl 275 . . . . . . . . . . . 12  |-  ( (
ph  /\  n  e.  ( ZZ>= `  M )
)  ->  n  e.  ZZ )
7774, 76fzfigd 10366 . . . . . . . . . . 11  |-  ( (
ph  /\  n  e.  ( ZZ>= `  M )
)  ->  ( M ... n )  e.  Fin )
78 elfzuz 9956 . . . . . . . . . . . . . 14  |-  ( k  e.  ( M ... n )  ->  k  e.  ( ZZ>= `  M )
)
7978, 2eleqtrrdi 2260 . . . . . . . . . . . . 13  |-  ( k  e.  ( M ... n )  ->  k  e.  Z )
8079, 36sylan2 284 . . . . . . . . . . . 12  |-  ( (
ph  /\  k  e.  ( M ... n ) )  ->  A  e.  CC )
8180adantlr 469 . . . . . . . . . . 11  |-  ( ( ( ph  /\  n  e.  ( ZZ>= `  M )
)  /\  k  e.  ( M ... n ) )  ->  A  e.  CC )
8277, 81fprodcl 11548 . . . . . . . . . 10  |-  ( (
ph  /\  n  e.  ( ZZ>= `  M )
)  ->  prod_ k  e.  ( M ... n
) A  e.  CC )
8360, 2eleqtrrdi 2260 . . . . . . . . . . 11  |-  ( n  e.  ( ZZ>= `  M
)  ->  ( n  +  1 )  e.  Z )
84 nfcsb1v 3078 . . . . . . . . . . . . . 14  |-  F/_ k [_ ( n  +  1 )  /  k ]_ A
8584nfel1 2319 . . . . . . . . . . . . 13  |-  F/ k
[_ ( n  + 
1 )  /  k ]_ A  e.  CC
86 csbeq1a 3054 . . . . . . . . . . . . . 14  |-  ( k  =  ( n  + 
1 )  ->  A  =  [_ ( n  + 
1 )  /  k ]_ A )
8786eleq1d 2235 . . . . . . . . . . . . 13  |-  ( k  =  ( n  + 
1 )  ->  ( A  e.  CC  <->  [_ ( n  +  1 )  / 
k ]_ A  e.  CC ) )
8885, 87rspc 2824 . . . . . . . . . . . 12  |-  ( ( n  +  1 )  e.  Z  ->  ( A. k  e.  Z  A  e.  CC  ->  [_ ( n  +  1 )  /  k ]_ A  e.  CC )
)
8937, 88mpan9 279 . . . . . . . . . . 11  |-  ( (
ph  /\  ( n  +  1 )  e.  Z )  ->  [_ (
n  +  1 )  /  k ]_ A  e.  CC )
9083, 89sylan2 284 . . . . . . . . . 10  |-  ( (
ph  /\  n  e.  ( ZZ>= `  M )
)  ->  [_ ( n  +  1 )  / 
k ]_ A  e.  CC )
9182, 90absmuld 11136 . . . . . . . . 9  |-  ( (
ph  /\  n  e.  ( ZZ>= `  M )
)  ->  ( abs `  ( prod_ k  e.  ( M ... n ) A  x.  [_ (
n  +  1 )  /  k ]_ A
) )  =  ( ( abs `  prod_ k  e.  ( M ... n ) A )  x.  ( abs `  [_ (
n  +  1 )  /  k ]_ A
) ) )
9272, 91eqtrd 2198 . . . . . . . 8  |-  ( (
ph  /\  n  e.  ( ZZ>= `  M )
)  ->  ( abs ` 
prod_ k  e.  ( M ... ( n  + 
1 ) ) A )  =  ( ( abs `  prod_ k  e.  ( M ... n
) A )  x.  ( abs `  [_ (
n  +  1 )  /  k ]_ A
) ) )
93923adant3 1007 . . . . . . 7  |-  ( (
ph  /\  n  e.  ( ZZ>= `  M )  /\  ( abs `  prod_ k  e.  ( M ... n ) A )  =  prod_ k  e.  ( M ... n ) ( abs `  A
) )  ->  ( abs `  prod_ k  e.  ( M ... ( n  +  1 ) ) A )  =  ( ( abs `  prod_ k  e.  ( M ... n ) A )  x.  ( abs `  [_ (
n  +  1 )  /  k ]_ A
) ) )
9470abscld 11123 . . . . . . . . . 10  |-  ( ( ( ph  /\  n  e.  ( ZZ>= `  M )
)  /\  k  e.  ( M ... ( n  +  1 ) ) )  ->  ( abs `  A )  e.  RR )
9594recnd 7927 . . . . . . . . 9  |-  ( ( ( ph  /\  n  e.  ( ZZ>= `  M )
)  /\  k  e.  ( M ... ( n  +  1 ) ) )  ->  ( abs `  A )  e.  CC )
9666, 95fprodp1s 11543 . . . . . . . 8  |-  ( (
ph  /\  n  e.  ( ZZ>= `  M )
)  ->  prod_ k  e.  ( M ... (
n  +  1 ) ) ( abs `  A
)  =  ( prod_
k  e.  ( M ... n ) ( abs `  A )  x.  [_ ( n  +  1 )  / 
k ]_ ( abs `  A
) ) )
97963adant3 1007 . . . . . . 7  |-  ( (
ph  /\  n  e.  ( ZZ>= `  M )  /\  ( abs `  prod_ k  e.  ( M ... n ) A )  =  prod_ k  e.  ( M ... n ) ( abs `  A
) )  ->  prod_ k  e.  ( M ... ( n  +  1
) ) ( abs `  A )  =  (
prod_ k  e.  ( M ... n ) ( abs `  A )  x.  [_ ( n  +  1 )  / 
k ]_ ( abs `  A
) ) )
9865, 93, 973eqtr4d 2208 . . . . . 6  |-  ( (
ph  /\  n  e.  ( ZZ>= `  M )  /\  ( abs `  prod_ k  e.  ( M ... n ) A )  =  prod_ k  e.  ( M ... n ) ( abs `  A
) )  ->  ( abs `  prod_ k  e.  ( M ... ( n  +  1 ) ) A )  =  prod_ k  e.  ( M ... ( n  +  1
) ) ( abs `  A ) )
99983exp 1192 . . . . 5  |-  ( ph  ->  ( n  e.  (
ZZ>= `  M )  -> 
( ( abs `  prod_ k  e.  ( M ... n ) A )  =  prod_ k  e.  ( M ... n ) ( abs `  A
)  ->  ( abs ` 
prod_ k  e.  ( M ... ( n  + 
1 ) ) A )  =  prod_ k  e.  ( M ... (
n  +  1 ) ) ( abs `  A
) ) ) )
10099com12 30 . . . 4  |-  ( n  e.  ( ZZ>= `  M
)  ->  ( ph  ->  ( ( abs `  prod_ k  e.  ( M ... n ) A )  =  prod_ k  e.  ( M ... n ) ( abs `  A
)  ->  ( abs ` 
prod_ k  e.  ( M ... ( n  + 
1 ) ) A )  =  prod_ k  e.  ( M ... (
n  +  1 ) ) ( abs `  A
) ) ) )
101100a2d 26 . . 3  |-  ( n  e.  ( ZZ>= `  M
)  ->  ( ( ph  ->  ( abs `  prod_ k  e.  ( M ... n ) A )  =  prod_ k  e.  ( M ... n ) ( abs `  A
) )  ->  ( ph  ->  ( abs `  prod_ k  e.  ( M ... ( n  +  1
) ) A )  =  prod_ k  e.  ( M ... ( n  +  1 ) ) ( abs `  A
) ) ) )
1029, 15, 21, 27, 58, 101uzind4 9526 . 2  |-  ( N  e.  ( ZZ>= `  M
)  ->  ( ph  ->  ( abs `  prod_ k  e.  ( M ... N ) A )  =  prod_ k  e.  ( M ... N ) ( abs `  A
) ) )
1033, 102mpcom 36 1  |-  ( ph  ->  ( abs `  prod_ k  e.  ( M ... N ) A )  =  prod_ k  e.  ( M ... N ) ( abs `  A
) )
Colors of variables: wff set class
Syntax hints:    -> wi 4    /\ wa 103    /\ w3a 968    = wceq 1343    e. wcel 2136   A.wral 2444   [_csb 3045   {csn 3576   ` cfv 5188  (class class class)co 5842   CCcc 7751   1c1 7754    + caddc 7756    x. cmul 7758   ZZcz 9191   ZZ>=cuz 9466   ...cfz 9944   abscabs 10939   prod_cprod 11491
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 604  ax-in2 605  ax-io 699  ax-5 1435  ax-7 1436  ax-gen 1437  ax-ie1 1481  ax-ie2 1482  ax-8 1492  ax-10 1493  ax-11 1494  ax-i12 1495  ax-bndl 1497  ax-4 1498  ax-17 1514  ax-i9 1518  ax-ial 1522  ax-i5r 1523  ax-13 2138  ax-14 2139  ax-ext 2147  ax-coll 4097  ax-sep 4100  ax-nul 4108  ax-pow 4153  ax-pr 4187  ax-un 4411  ax-setind 4514  ax-iinf 4565  ax-cnex 7844  ax-resscn 7845  ax-1cn 7846  ax-1re 7847  ax-icn 7848  ax-addcl 7849  ax-addrcl 7850  ax-mulcl 7851  ax-mulrcl 7852  ax-addcom 7853  ax-mulcom 7854  ax-addass 7855  ax-mulass 7856  ax-distr 7857  ax-i2m1 7858  ax-0lt1 7859  ax-1rid 7860  ax-0id 7861  ax-rnegex 7862  ax-precex 7863  ax-cnre 7864  ax-pre-ltirr 7865  ax-pre-ltwlin 7866  ax-pre-lttrn 7867  ax-pre-apti 7868  ax-pre-ltadd 7869  ax-pre-mulgt0 7870  ax-pre-mulext 7871  ax-arch 7872  ax-caucvg 7873
This theorem depends on definitions:  df-bi 116  df-dc 825  df-3or 969  df-3an 970  df-tru 1346  df-fal 1349  df-nf 1449  df-sb 1751  df-eu 2017  df-mo 2018  df-clab 2152  df-cleq 2158  df-clel 2161  df-nfc 2297  df-ne 2337  df-nel 2432  df-ral 2449  df-rex 2450  df-reu 2451  df-rmo 2452  df-rab 2453  df-v 2728  df-sbc 2952  df-csb 3046  df-dif 3118  df-un 3120  df-in 3122  df-ss 3129  df-nul 3410  df-if 3521  df-pw 3561  df-sn 3582  df-pr 3583  df-op 3585  df-uni 3790  df-int 3825  df-iun 3868  df-br 3983  df-opab 4044  df-mpt 4045  df-tr 4081  df-id 4271  df-po 4274  df-iso 4275  df-iord 4344  df-on 4346  df-ilim 4347  df-suc 4349  df-iom 4568  df-xp 4610  df-rel 4611  df-cnv 4612  df-co 4613  df-dm 4614  df-rn 4615  df-res 4616  df-ima 4617  df-iota 5153  df-fun 5190  df-fn 5191  df-f 5192  df-f1 5193  df-fo 5194  df-f1o 5195  df-fv 5196  df-isom 5197  df-riota 5798  df-ov 5845  df-oprab 5846  df-mpo 5847  df-1st 6108  df-2nd 6109  df-recs 6273  df-irdg 6338  df-frec 6359  df-1o 6384  df-oadd 6388  df-er 6501  df-en 6707  df-dom 6708  df-fin 6709  df-pnf 7935  df-mnf 7936  df-xr 7937  df-ltxr 7938  df-le 7939  df-sub 8071  df-neg 8072  df-reap 8473  df-ap 8480  df-div 8569  df-inn 8858  df-2 8916  df-3 8917  df-4 8918  df-n0 9115  df-z 9192  df-uz 9467  df-q 9558  df-rp 9590  df-fz 9945  df-fzo 10078  df-seqfrec 10381  df-exp 10455  df-ihash 10689  df-cj 10784  df-re 10785  df-im 10786  df-rsqrt 10940  df-abs 10941  df-clim 11220  df-proddc 11492
This theorem is referenced by: (None)
  Copyright terms: Public domain W3C validator