Theorem shftdm 11382

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 11381	. . 3 |- ( A e. CC -> ( F shift A ) = { <. x , y >. | ( x e. CC /\ ( x - A ) F y ) } )
3	2	dmeqd 4933	. 2 |- ( A e. CC -> dom ( F shift A ) = dom { <. x , y >. | ( x e. CC /\ ( x - A ) F y ) } )
4		19.42v 1955	. . . . 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 8489	. . . . . . 7 |- ( ( A e. CC /\ x e. CC ) -> ( x - A ) e. CC )
8		eldmg 4926	. . . . . . 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 452	. . . . 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 2349	. . 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 4942	. . 3 |- dom { <. x , y >. | ( x e. CC /\ ( x - A ) F y ) } = { x | E. y ( x e. CC /\ ( x - A ) F y ) }
14		df-rab 2519	. . 3 |- { x e. CC | ( x - A ) e. dom F } = { x | ( x e. CC /\ ( x - A ) e. dom F ) }
15	12, 13, 14	3eqtr4g 2289	. 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 2264	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 1397   E.wex 1540   e. wcel 2202   {cab 2217   {crab 2514   _Vcvv 2802   class class class wbr 4088   {copab 4149   dom cdm 4725  (class class class)co 6017   CCcc 8029   - cmin 8349   shift cshi 11374

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 619  ax-in2 620  ax-io 716  ax-5 1495  ax-7 1496  ax-gen 1497  ax-ie1 1541  ax-ie2 1542  ax-8 1552  ax-10 1553  ax-11 1554  ax-i12 1555  ax-bndl 1557  ax-4 1558  ax-17 1574  ax-i9 1578  ax-ial 1582  ax-i5r 1583  ax-13 2204  ax-14 2205  ax-ext 2213  ax-coll 4204  ax-sep 4207  ax-pow 4264  ax-pr 4299  ax-un 4530  ax-setind 4635  ax-resscn 8123  ax-1cn 8124  ax-icn 8126  ax-addcl 8127  ax-addrcl 8128  ax-mulcl 8129  ax-addcom 8131  ax-addass 8133  ax-distr 8135  ax-i2m1 8136  ax-0id 8139  ax-rnegex 8140  ax-cnre 8142

This theorem depends on definitions:  df-bi 117  df-3an 1006  df-tru 1400  df-fal 1403  df-nf 1509  df-sb 1811  df-eu 2082  df-mo 2083  df-clab 2218  df-cleq 2224  df-clel 2227  df-nfc 2363  df-ne 2403  df-ral 2515  df-rex 2516  df-reu 2517  df-rab 2519  df-v 2804  df-sbc 3032  df-csb 3128  df-dif 3202  df-un 3204  df-in 3206  df-ss 3213  df-pw 3654  df-sn 3675  df-pr 3676  df-op 3678  df-uni 3894  df-iun 3972  df-br 4089  df-opab 4151  df-mpt 4152  df-id 4390  df-xp 4731  df-rel 4732  df-cnv 4733  df-co 4734  df-dm 4735  df-rn 4736  df-res 4737  df-ima 4738  df-iota 5286  df-fun 5328  df-fn 5329  df-f 5330  df-f1 5331  df-fo 5332  df-f1o 5333  df-fv 5334  df-riota 5970  df-ov 6020  df-oprab 6021  df-mpo 6022  df-sub 8351  df-shft 11375

This theorem is referenced by:  shftfn  11384