Theorem eqeltrrdi 2322

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

Hypotheses

Ref	Expression
eqeltrrdi.1	⊢ (𝜑 → 𝐵 = 𝐴)
eqeltrrdi.2	⊢ 𝐵 ∈ 𝐶

Assertion

Ref	Expression
eqeltrrdi	⊢ (𝜑 → 𝐴 ∈ 𝐶)

Proof of Theorem eqeltrrdi

Step	Hyp	Ref	Expression
1		eqeltrrdi.1	. . 3 ⊢ (𝜑 → 𝐵 = 𝐴)
2	1	eqcomd 2236	. 2 ⊢ (𝜑 → 𝐴 = 𝐵)
3		eqeltrrdi.2	. 2 ⊢ 𝐵 ∈ 𝐶
4	2, 3	eqeltrdi 2321	1 ⊢ (𝜑 → 𝐴 ∈ 𝐶)

Syntax hints:   → wi 4   = wceq 1397   ∈ wcel 2201

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 1495  ax-gen 1497  ax-ie1 1541  ax-ie2 1542  ax-4 1558  ax-17 1574  ax-ial 1582  ax-ext 2212

This theorem depends on definitions:  df-bi 117  df-cleq 2223  df-clel 2226

This theorem is referenced by:  eusvnfb  4553  releldm2  6353  mapprc  6826  ixpprc  6893  ixpssmap2g  6901  ixpssmapg  6902  bren  6922  brdomg  6924  mapen  7037  ssenen  7042  fi0  7179  nnnninf2  7331  ioof  10211  hashfacen  11106  fsum3  11971  psrval  14704  cnrehmeocntop  15363