Theorem eqeltrrdi 2330

Description: A membership and equality inference. (Contributed by NM, 4-Jan-2006.)

Hypotheses

Ref	Expression
eqeltrrdi.1	|- ( ph -> B = A )
eqeltrrdi.2	|- B e. C

Assertion

Ref	Expression
eqeltrrdi	|- ( ph -> A e. C )

Proof of Theorem eqeltrrdi

Step	Hyp	Ref	Expression
1		eqeltrrdi.1	. . 3 |- ( ph -> B = A )
2	1	eqcomd 2244	. 2 |- ( ph -> A = B )
3		eqeltrrdi.2	. 2 |- B e. C
4	2, 3	eqeltrdi 2329	1 |- ( ph -> A e. C )

This proof depends on syntax axioms:   -> wi 4   = wceq 1402   e. wcel 2209

This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-5 1500  ax-gen 1502  ax-ie1 1546  ax-ie2 1547  ax-4 1563  ax-17 1579  ax-ial 1587  ax-ext 2220

This proof depends on definitions:  df-bi 117  df-cleq 2231  df-clel 2234

This theorem is used by:  eusvnfb  4602  releldm2  6423  mapprc  6931  mapfoss  6952  ixpprc  7007  ixpssmap2g  7015  ixpssmapg  7016  bren  7036  brdomg  7038  mapen  7152  ssenen  7158  fi0  7314  nnnninf2  7473  ioof  10389  hashfibc  11304  hashfacen  11305  fsum3  12178  psrval  15160  cnrehmeocntop  15853