Theorem eqeltrrdi 2326

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 2240	. 2 |- ( ph -> A = B )
3		eqeltrrdi.2	. 2 |- B e. C
4	2, 3	eqeltrdi 2325	1 |- ( ph -> A e. C )

Syntax hints:   -> wi 4   = wceq 1398   e. wcel 2205

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-5 1496  ax-gen 1498  ax-ie1 1542  ax-ie2 1543  ax-4 1559  ax-17 1575  ax-ial 1583  ax-ext 2216

This theorem depends on definitions:  df-bi 117  df-cleq 2227  df-clel 2230

This theorem is referenced by:  eusvnfb  4580  releldm2  6392  mapprc  6899  ixpprc  6967  ixpssmap2g  6975  ixpssmapg  6976  bren  6996  brdomg  6998  mapen  7112  ssenen  7118  fi0  7275  nnnninf2  7431  ioof  10323  hashfibc  11232  hashfacen  11233  fsum3  12098  psrval  14940  cnrehmeocntop  15601