Theorem eqeltrrdi 2330

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 2244	. 2 ⊢ (𝜑 → 𝐴 = 𝐵)
3		eqeltrrdi.2	. 2 ⊢ 𝐵 ∈ 𝐶
4	2, 3	eqeltrdi 2329	1 ⊢ (𝜑 → 𝐴 ∈ 𝐶)

Syntax hints:   → wi 4   = wceq 1402   ∈ wcel 2209

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 1500  ax-gen 1502  ax-ie1 1546  ax-ie2 1547  ax-4 1563  ax-17 1579  ax-ial 1587  ax-ext 2220

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

This theorem is referenced by:  eusvnfb  4595  releldm2  6409  mapprc  6916  mapfoss  6937  ixpprc  6991  ixpssmap2g  6999  ixpssmapg  7000  bren  7020  brdomg  7022  mapen  7136  ssenen  7142  fi0  7299  nnnninf2  7457  ioof  10352  hashfibc  11261  hashfacen  11262  fsum3  12132  psrval  14973  cnrehmeocntop  15634