Theorem eqeltrrdi 2323

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 2237	. 2 ⊢ (𝜑 → 𝐴 = 𝐵)
3		eqeltrrdi.2	. 2 ⊢ 𝐵 ∈ 𝐶
4	2, 3	eqeltrdi 2322	1 ⊢ (𝜑 → 𝐴 ∈ 𝐶)

Syntax hints:   → wi 4   = wceq 1398   ∈ wcel 2202

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 2213

This theorem depends on definitions:  df-bi 117  df-cleq 2224  df-clel 2227

This theorem is referenced by:  eusvnfb  4557  releldm2  6357  mapprc  6864  ixpprc  6931  ixpssmap2g  6939  ixpssmapg  6940  bren  6960  brdomg  6962  mapen  7075  ssenen  7080  fi0  7217  nnnninf2  7369  ioof  10250  hashfacen  11146  fsum3  12011  psrval  14745  cnrehmeocntop  15404