Theorem rabssab 3230

Description: A restricted class is a subclass of the corresponding unrestricted class. (Contributed by Mario Carneiro, 23-Dec-2016.)

Assertion

Ref	Expression
rabssab	|- { x e. A | ph } C_ { x | ph }

Proof of Theorem rabssab

Step	Hyp	Ref	Expression
1		df-rab 2453	. 2 |- { x e. A | ph } = { x | ( x e. A /\ ph ) }
2		simpr 109	. . 3 |- ( ( x e. A /\ ph ) -> ph )
3	2	ss2abi 3214	. 2 |- { x | ( x e. A /\ ph ) } C_ { x | ph }
4	1, 3	eqsstri 3174	1 |- { x e. A | ph } C_ { x | ph }

Syntax hints:   /\ wa 103   e. wcel 2136   {cab 2151   {crab 2448   C_ wss 3116

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-io 699  ax-5 1435  ax-7 1436  ax-gen 1437  ax-ie1 1481  ax-ie2 1482  ax-8 1492  ax-10 1493  ax-11 1494  ax-i12 1495  ax-bndl 1497  ax-4 1498  ax-17 1514  ax-i9 1518  ax-ial 1522  ax-i5r 1523  ax-ext 2147

This theorem depends on definitions:  df-bi 116  df-nf 1449  df-sb 1751  df-clab 2152  df-cleq 2158  df-clel 2161  df-nfc 2297  df-rab 2453  df-in 3122  df-ss 3129

This theorem is referenced by:  epse  4320  riotasbc  5813  genipv  7450  toponsspwpwg  12660  dmtopon  12661