Theorem shftdm 11333

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 11332	. . 3 |- ( A e. CC -> ( F shift A ) = { <. x , y >. | ( x e. CC /\ ( x - A ) F y ) } )
3	2	dmeqd 4925	. 2 |- ( A e. CC -> dom ( F shift A ) = dom { <. x , y >. | ( x e. CC /\ ( x - A ) F y ) } )
4		19.42v 1953	. . . . 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 8457	. . . . . . 7 |- ( ( A e. CC /\ x e. CC ) -> ( x - A ) e. CC )
8		eldmg 4918	. . . . . . 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 2347	. . 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 4934	. . 3 |- dom { <. x , y >. | ( x e. CC /\ ( x - A ) F y ) } = { x | E. y ( x e. CC /\ ( x - A ) F y ) }
14		df-rab 2517	. . 3 |- { x e. CC | ( x - A ) e. dom F } = { x | ( x e. CC /\ ( x - A ) e. dom F ) }
15	12, 13, 14	3eqtr4g 2287	. 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 2262	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 1395   E.wex 1538   e. wcel 2200   {cab 2215   {crab 2512   _Vcvv 2799   class class class wbr 4083   {copab 4144   dom cdm 4719  (class class class)co 6001   CCcc 7997   - cmin 8317   shift cshi 11325

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 617  ax-in2 618  ax-io 714  ax-5 1493  ax-7 1494  ax-gen 1495  ax-ie1 1539  ax-ie2 1540  ax-8 1550  ax-10 1551  ax-11 1552  ax-i12 1553  ax-bndl 1555  ax-4 1556  ax-17 1572  ax-i9 1576  ax-ial 1580  ax-i5r 1581  ax-13 2202  ax-14 2203  ax-ext 2211  ax-coll 4199  ax-sep 4202  ax-pow 4258  ax-pr 4293  ax-un 4524  ax-setind 4629  ax-resscn 8091  ax-1cn 8092  ax-icn 8094  ax-addcl 8095  ax-addrcl 8096  ax-mulcl 8097  ax-addcom 8099  ax-addass 8101  ax-distr 8103  ax-i2m1 8104  ax-0id 8107  ax-rnegex 8108  ax-cnre 8110

This theorem depends on definitions:  df-bi 117  df-3an 1004  df-tru 1398  df-fal 1401  df-nf 1507  df-sb 1809  df-eu 2080  df-mo 2081  df-clab 2216  df-cleq 2222  df-clel 2225  df-nfc 2361  df-ne 2401  df-ral 2513  df-rex 2514  df-reu 2515  df-rab 2517  df-v 2801  df-sbc 3029  df-csb 3125  df-dif 3199  df-un 3201  df-in 3203  df-ss 3210  df-pw 3651  df-sn 3672  df-pr 3673  df-op 3675  df-uni 3889  df-iun 3967  df-br 4084  df-opab 4146  df-mpt 4147  df-id 4384  df-xp 4725  df-rel 4726  df-cnv 4727  df-co 4728  df-dm 4729  df-rn 4730  df-res 4731  df-ima 4732  df-iota 5278  df-fun 5320  df-fn 5321  df-f 5322  df-f1 5323  df-fo 5324  df-f1o 5325  df-fv 5326  df-riota 5954  df-ov 6004  df-oprab 6005  df-mpo 6006  df-sub 8319  df-shft 11326

This theorem is referenced by:  shftfn  11335