Theorem elab2 2690

Description: Membership in a class abstraction, using implicit substitution. (Contributed by NM, 13-Sep-1995.)

Hypotheses

Ref	Expression
elab2.1	|- A e. _V
elab2.2	|- ( x = A -> ( ph <-> ps ) )
elab2.3	|- B = { x | ph }

Assertion

Ref	Expression
elab2	|- ( A e. B <-> ps )

Distinct variable groups:   ps, x   x, A

Allowed substitution hints:   ph( x)   B( x)

Proof of Theorem elab2

Step	Hyp	Ref	Expression
1		elab2.1	. 2 |- A e. _V
2		elab2.2	. . 3 |- ( x = A -> ( ph <-> ps ) )
3		elab2.3	. . 3 |- B = { x | ph }
4	2, 3	elab2g 2689	. 2 |- ( A e. _V -> ( A e. B <-> ps ) )
5	1, 4	ax-mp 7	1 |- ( A e. B <-> ps )

Syntax hints:   -> wi 4   <-> wb 98   = wceq 1243   e. wcel 1393   {cab 2026   _Vcvv 2557

This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 99  ax-ia2 100  ax-ia3 101  ax-io 630  ax-5 1336  ax-7 1337  ax-gen 1338  ax-ie1 1382  ax-ie2 1383  ax-8 1395  ax-10 1396  ax-11 1397  ax-i12 1398  ax-bndl 1399  ax-4 1400  ax-17 1419  ax-i9 1423  ax-ial 1427  ax-i5r 1428  ax-ext 2022

This theorem depends on definitions:  df-bi 110  df-tru 1246  df-nf 1350  df-sb 1646  df-clab 2027  df-cleq 2033  df-clel 2036  df-nfc 2167  df-v 2559

This theorem is referenced by:  elpw  3365  elint  3621  opabid  3994  elrn2  4576  elimasn  4692  oprabid  5537  tfrlem3a  5925  addnqprlemrl  6655  addnqprlemru  6656  addnqprlemfl  6657  addnqprlemfu  6658  mulnqprlemrl  6671  mulnqprlemru  6672  mulnqprlemfl  6673  mulnqprlemfu  6674  ltnqpr  6691  ltnqpri  6692  archpr  6741  cauappcvgprlemladdfu  6752  cauappcvgprlemladdfl  6753  caucvgprlemladdfu  6775  caucvgprprlemopu  6797