Theorem reldmmpo 6173

Description: The domain of an operation defined by maps-to notation is a relation. (Contributed by Stefan O'Rear, 27-Nov-2014.)

Hypothesis

Ref	Expression
rngop.1	|- F = ( x e. A , y e. B |-> C )

Assertion

Ref	Expression
reldmmpo	|- Rel dom F

Distinct variable groups:   y, A   x, y

Allowed substitution hints:   A( x)   B( x, y)   C( x, y)   F( x, y)

Proof of Theorem reldmmpo

Dummy variable z is distinct from all other variables.

Step	Hyp	Ref	Expression
1		reldmoprab 6146	. 2 |- Rel dom { <. <. x , y >. , z >. | ( ( x e. A /\ y e. B ) /\ z = C ) }
2		rngop.1	. . . . 5 |- F = ( x e. A , y e. B |-> C )
3		df-mpo 6063	. . . . 5 |- ( x e. A , y e. B |-> C ) = { <. <. x , y >. , z >. | ( ( x e. A /\ y e. B ) /\ z = C ) }
4	2, 3	eqtri 2255	. . . 4 |- F = { <. <. x , y >. , z >. | ( ( x e. A /\ y e. B ) /\ z = C ) }
5	4	dmeqi 4962	. . 3 |- dom F = dom { <. <. x , y >. , z >. | ( ( x e. A /\ y e. B ) /\ z = C ) }
6	5	releqi 4838	. 2 |- ( Rel dom F <-> Rel dom { <. <. x , y >. , z >. | ( ( x e. A /\ y e. B ) /\ z = C ) } )
7	1, 6	mpbir 146	1 |- Rel dom F

Syntax hints:   /\ wa 104   = wceq 1398   e. wcel 2205   dom cdm 4754   Rel wrel 4759   {coprab 6059   e. cmpo 6060

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-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-14 2208  ax-ext 2216  ax-sep 4233  ax-pow 4292  ax-pr 4327

This theorem depends on definitions:  df-bi 117  df-3an 1007  df-tru 1401  df-nf 1510  df-sb 1812  df-eu 2085  df-mo 2086  df-clab 2221  df-cleq 2227  df-clel 2230  df-nfc 2375  df-ral 2527  df-rex 2528  df-v 2817  df-un 3218  df-in 3220  df-ss 3227  df-pw 3676  df-sn 3700  df-pr 3701  df-op 3703  df-br 4115  df-opab 4177  df-xp 4760  df-rel 4761  df-dm 4764  df-oprab 6062  df-mpo 6063

This theorem is referenced by:  reldmmap  6904  reldmsets  13325  reldmress  13360  reldmghm  13995  reldmprds  14113  reldmpsr  14939  reldmmpl  14970