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Theorem shftval 11568
Description: Value of a sequence shifted by  A. (Contributed by NM, 20-Jul-2005.) (Revised by Mario Carneiro, 4-Nov-2013.)
Hypothesis
Ref Expression
shftfval.1  |-  F  e. 
_V
Assertion
Ref Expression
shftval  |-  ( ( A  e.  CC  /\  B  e.  CC )  ->  ( ( F  shift  A ) `  B )  =  ( F `  ( B  -  A
) ) )

Proof of Theorem shftval
Dummy variable  x is distinct from all other variables.
StepHypRef Expression
1 shftfval.1 . . . . 5  |-  F  e. 
_V
21shftfib 11566 . . . 4  |-  ( ( A  e.  CC  /\  B  e.  CC )  ->  ( ( F  shift  A ) " { B } )  =  ( F " { ( B  -  A ) } ) )
32eleq2d 2308 . . 3  |-  ( ( A  e.  CC  /\  B  e.  CC )  ->  ( x  e.  ( ( F  shift  A )
" { B }
)  <->  x  e.  ( F " { ( B  -  A ) } ) ) )
43iotabidv 5355 . 2  |-  ( ( A  e.  CC  /\  B  e.  CC )  ->  ( iota x x  e.  ( ( F 
shift  A ) " { B } ) )  =  ( iota x x  e.  ( F " { ( B  -  A ) } ) ) )
5 simpr 110 . . 3  |-  ( ( A  e.  CC  /\  B  e.  CC )  ->  B  e.  CC )
6 dffv3g 5686 . . 3  |-  ( B  e.  CC  ->  (
( F  shift  A ) `
 B )  =  ( iota x x  e.  ( ( F 
shift  A ) " { B } ) ) )
75, 6syl 14 . 2  |-  ( ( A  e.  CC  /\  B  e.  CC )  ->  ( ( F  shift  A ) `  B )  =  ( iota x x  e.  ( ( F  shift  A ) " { B } ) ) )
8 simpl 109 . . . 4  |-  ( ( A  e.  CC  /\  B  e.  CC )  ->  A  e.  CC )
95, 8subcld 8627 . . 3  |-  ( ( A  e.  CC  /\  B  e.  CC )  ->  ( B  -  A
)  e.  CC )
10 dffv3g 5686 . . 3  |-  ( ( B  -  A )  e.  CC  ->  ( F `  ( B  -  A ) )  =  ( iota x x  e.  ( F " { ( B  -  A ) } ) ) )
119, 10syl 14 . 2  |-  ( ( A  e.  CC  /\  B  e.  CC )  ->  ( F `  ( B  -  A )
)  =  ( iota
x x  e.  ( F " { ( B  -  A ) } ) ) )
124, 7, 113eqtr4d 2281 1  |-  ( ( A  e.  CC  /\  B  e.  CC )  ->  ( ( F  shift  A ) `  B )  =  ( F `  ( B  -  A
) ) )
Colors of variables: wff set class
Syntax hints:    -> wi 4    /\ wa 104    = wceq 1402    e. wcel 2209   _Vcvv 2821   {csn 3705   "cima 4772   iotacio 5330   ` cfv 5372  (class class class)co 6075   CCcc 8167    - cmin 8487    shift cshi 11557
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 623  ax-in2 624  ax-io 721  ax-5 1500  ax-7 1501  ax-gen 1502  ax-ie1 1546  ax-ie2 1547  ax-8 1557  ax-10 1558  ax-11 1559  ax-i12 1560  ax-bndl 1562  ax-4 1563  ax-17 1579  ax-i9 1583  ax-ial 1587  ax-i5r 1588  ax-14 2212  ax-ext 2220  ax-coll 4241  ax-sep 4244  ax-pow 4306  ax-pr 4341  ax-un 4573  ax-setind 4679  ax-resscn 8261  ax-1cn 8262  ax-icn 8264  ax-addcl 8265  ax-addrcl 8266  ax-mulcl 8267  ax-addcom 8269  ax-addass 8271  ax-distr 8273  ax-i2m1 8274  ax-0id 8277  ax-rnegex 8278  ax-cnre 8280
This theorem depends on definitions:  df-bi 117  df-3an 1011  df-tru 1405  df-fal 1408  df-nf 1514  df-sb 1816  df-eu 2089  df-mo 2090  df-clab 2225  df-cleq 2231  df-clel 2234  df-nfc 2381  df-ne 2421  df-ral 2533  df-rex 2534  df-reu 2535  df-rab 2537  df-v 2823  df-sbc 3052  df-csb 3148  df-dif 3222  df-un 3224  df-in 3226  df-ss 3233  df-pw 3687  df-sn 3711  df-pr 3712  df-op 3714  df-uni 3931  df-iun 4009  df-br 4126  df-opab 4188  df-mpt 4189  df-id 4433  df-xp 4775  df-rel 4776  df-cnv 4777  df-co 4778  df-dm 4779  df-rn 4780  df-res 4781  df-ima 4782  df-iota 5332  df-fun 5374  df-fn 5375  df-f 5376  df-f1 5377  df-fo 5378  df-f1o 5379  df-fv 5380  df-riota 6028  df-ov 6078  df-oprab 6079  df-mpo 6080  df-sub 8489  df-shft 11558
This theorem is referenced by:  shftval2  11569  shftval4  11571  shftval5  11572  shftf  11573  shftvalg  11579  isumshft  12235
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