Theorem rabab 2877

Description: A class abstraction restricted to the universe is unrestricted. (Contributed by NM, 27-Dec-2004.) (Proof shortened by Andrew Salmon, 8-Jun-2011.)

Assertion

Ref	Expression
rabab	|- {x e. _V | ph} = {x | ph}

Proof of Theorem rabab

Step	Hyp	Ref	Expression
1		df-rab 2624	. 2 |- {x e. _V | ph} = {x | (x e. _V /\ ph)}
2		vex 2863	. . . 4 |- x e. _V
3	2	biantrur 492	. . 3 |- (ph <-> (x e. _V /\ ph))
4	3	abbii 2466	. 2 |- {x | ph} = {x | (x e. _V /\ ph)}
5	1, 4	eqtr4i 2376	1 |- {x e. _V | ph} = {x | ph}

Syntax hints:   /\ wa 358   = wceq 1642   e. wcel 1710  {cab 2339  {crab 2619  _Vcvv 2860

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1546  ax-5 1557  ax-17 1616  ax-9 1654  ax-8 1675  ax-6 1729  ax-7 1734  ax-11 1746  ax-12 1925  ax-ext 2334

This theorem depends on definitions:  df-bi 177  df-an 360  df-tru 1319  df-ex 1542  df-nf 1545  df-sb 1649  df-clab 2340  df-cleq 2346  df-clel 2349  df-rab 2624  df-v 2862

This theorem is referenced by:  notab  3526  intmin2  3954