Theorem shftdm 11462

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 11461	. . 3 |- ( A e. CC -> ( F shift A ) = { <. x , y >. | ( x e. CC /\ ( x - A ) F y ) } )
3	2	dmeqd 4939	. 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 8549	. . . . . . 7 |- ( ( A e. CC /\ x e. CC ) -> ( x - A ) e. CC )
8		eldmg 4932	. . . . . . 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 2350	. . 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 4948	. . 3 |- dom { <. x , y >. | ( x e. CC /\ ( x - A ) F y ) } = { x | E. y ( x e. CC /\ ( x - A ) F y ) }
14		df-rab 2520	. . 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 1398   E.wex 1541   e. wcel 2202   {cab 2217   {crab 2515   _Vcvv 2803   class class class wbr 4093   {copab 4154   dom cdm 4731  (class class class)co 6028   CCcc 8090   - cmin 8409   shift cshi 11454

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 717  ax-5 1496  ax-7 1497  ax-gen 1498  ax-ie1 1542  ax-ie2 1543  ax-8 1553  ax-10 1554  ax-11 1555  ax-i12 1556  ax-bndl 1558  ax-4 1559  ax-17 1575  ax-i9 1579  ax-ial 1583  ax-i5r 1584  ax-13 2204  ax-14 2205  ax-ext 2213  ax-coll 4209  ax-sep 4212  ax-pow 4270  ax-pr 4305  ax-un 4536  ax-setind 4641  ax-resscn 8184  ax-1cn 8185  ax-icn 8187  ax-addcl 8188  ax-addrcl 8189  ax-mulcl 8190  ax-addcom 8192  ax-addass 8194  ax-distr 8196  ax-i2m1 8197  ax-0id 8200  ax-rnegex 8201  ax-cnre 8203

This theorem depends on definitions:  df-bi 117  df-3an 1007  df-tru 1401  df-fal 1404  df-nf 1510  df-sb 1811  df-eu 2082  df-mo 2083  df-clab 2218  df-cleq 2224  df-clel 2227  df-nfc 2364  df-ne 2404  df-ral 2516  df-rex 2517  df-reu 2518  df-rab 2520  df-v 2805  df-sbc 3033  df-csb 3129  df-dif 3203  df-un 3205  df-in 3207  df-ss 3214  df-pw 3658  df-sn 3679  df-pr 3680  df-op 3682  df-uni 3899  df-iun 3977  df-br 4094  df-opab 4156  df-mpt 4157  df-id 4396  df-xp 4737  df-rel 4738  df-cnv 4739  df-co 4740  df-dm 4741  df-rn 4742  df-res 4743  df-ima 4744  df-iota 5293  df-fun 5335  df-fn 5336  df-f 5337  df-f1 5338  df-fo 5339  df-f1o 5340  df-fv 5341  df-riota 5981  df-ov 6031  df-oprab 6032  df-mpo 6033  df-sub 8411  df-shft 11455

This theorem is referenced by:  shftfn  11464