Theorem syl6eqelr 2176

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

Hypotheses

Ref	Expression
syl6eqelr.1	⊢ (𝜑 → 𝐵 = 𝐴)
syl6eqelr.2	⊢ 𝐵 ∈ 𝐶

Assertion

Ref	Expression
syl6eqelr	⊢ (𝜑 → 𝐴 ∈ 𝐶)

Proof of Theorem syl6eqelr

Step	Hyp	Ref	Expression
1		syl6eqelr.1	. . 3 ⊢ (𝜑 → 𝐵 = 𝐴)
2	1	eqcomd 2090	. 2 ⊢ (𝜑 → 𝐴 = 𝐵)
3		syl6eqelr.2	. 2 ⊢ 𝐵 ∈ 𝐶
4	2, 3	syl6eqel 2175	1 ⊢ (𝜑 → 𝐴 ∈ 𝐶)

Syntax hints:   → wi 4   = wceq 1287   ∈ wcel 1436

This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 104  ax-ia2 105  ax-ia3 106  ax-5 1379  ax-gen 1381  ax-ie1 1425  ax-ie2 1426  ax-4 1443  ax-17 1462  ax-ial 1470  ax-ext 2067

This theorem depends on definitions:  df-bi 115  df-cleq 2078  df-clel 2081

This theorem is referenced by:  eusvnfb  4243  releldm2  5893  mapprc  6342  bren  6397  brdomg  6398  ctex  6403  mapen  6495  ssenen  6500  ioof  9298  hashfacen  10089