Theorem shftdm 11565

Description: Domain of a relation shifted by A. The set on the right is more commonly notated as ( dom F + A ) (meaning add A to every element of dom F). (Contributed by Mario Carneiro, 3-Nov-2013.)

Hypothesis

Ref	Expression
shftfval.1	|- F e. _V

Assertion

Ref	Expression
shftdm	|- ( A e. CC -> dom ( F shift A ) = { x e. CC | ( x - A ) e. dom F } )

Distinct variable groups:   x, A   x, F

Proof of Theorem shftdm

Dummy variable y is distinct from all other variables.

Step	Hyp	Ref	Expression
1		shftfval.1	. . . 4 |- F e. _V
2	1	shftfval 11564	. . 3 |- ( A e. CC -> ( F shift A ) = { <. x , y >. | ( x e. CC /\ ( x - A ) F y ) } )
3	2	dmeqd 4978	. 2 |- ( A e. CC -> dom ( F shift A ) = dom { <. x , y >. | ( x e. CC /\ ( x - A ) F y ) } )
4		19.42v 1962	. . . . 5 |- ( E. y ( x e. CC /\ ( x - A ) F y ) <-> ( x e. CC /\ E. y ( x - A ) F y ) )
5		simpr 110	. . . . . . . 8 |- ( ( A e. CC /\ x e. CC ) -> x e. CC )
6		simpl 109	. . . . . . . 8 |- ( ( A e. CC /\ x e. CC ) -> A e. CC )
7	5, 6	subcld 8627	. . . . . . 7 |- ( ( A e. CC /\ x e. CC ) -> ( x - A ) e. CC )
8		eldmg 4971	. . . . . . 7 |- ( ( x - A ) e. CC -> ( ( x - A ) e. dom F <-> E. y ( x - A ) F y ) )
9	7, 8	syl 14	. . . . . 6 |- ( ( A e. CC /\ x e. CC ) -> ( ( x - A ) e. dom F <-> E. y ( x - A ) F y ) )
10	9	pm5.32da 456	. . . . 5 |- ( A e. CC -> ( ( x e. CC /\ ( x - A ) e. dom F ) <-> ( x e. CC /\ E. y ( x - A ) F y ) ) )
11	4, 10	bitr4id 199	. . . 4 |- ( A e. CC -> ( E. y ( x e. CC /\ ( x - A ) F y ) <-> ( x e. CC /\ ( x - A ) e. dom F ) ) )
12	11	abbidv 2358	. . 3 |- ( A e. CC -> { x | E. y ( x e. CC /\ ( x - A ) F y ) } = { x | ( x e. CC /\ ( x - A ) e. dom F ) } )
13		dmopab 4987	. . 3 |- dom { <. x , y >. | ( x e. CC /\ ( x - A ) F y ) } = { x | E. y ( x e. CC /\ ( x - A ) F y ) }
14		df-rab 2537	. . 3 |- { x e. CC | ( x - A ) e. dom F } = { x | ( x e. CC /\ ( x - A ) e. dom F ) }
15	12, 13, 14	3eqtr4g 2296	. 2 |- ( A e. CC -> dom { <. x , y >. | ( x e. CC /\ ( x - A ) F y ) } = { x e. CC | ( x - A ) e. dom F } )
16	3, 15	eqtrd 2271	1 |- ( A e. CC -> dom ( F shift A ) = { x e. CC | ( x - A ) e. dom F } )

Syntax hints:   -> wi 4   /\ wa 104   <-> wb 105   = wceq 1402   E.wex 1545   e. wcel 2209   {cab 2224   {crab 2532   _Vcvv 2821   class class class wbr 4125   {copab 4186   dom cdm 4769  (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:  shftfn  11567