Theorem eleqtrrid 2319

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

Hypotheses

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

Assertion

Ref	Expression
eleqtrrid	⊢ (𝜑 → 𝐴 ∈ 𝐶)

Proof of Theorem eleqtrrid

Step	Hyp	Ref	Expression
1		eleqtrrid.1	. 2 ⊢ 𝐴 ∈ 𝐵
2		eleqtrrid.2	. . 3 ⊢ (𝜑 → 𝐶 = 𝐵)
3	2	eqcomd 2235	. 2 ⊢ (𝜑 → 𝐵 = 𝐶)
4	1, 3	eleqtrid 2318	1 ⊢ (𝜑 → 𝐴 ∈ 𝐶)

Syntax hints:   → wi 4   = wceq 1395   ∈ wcel 2200

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 1493  ax-gen 1495  ax-ie1 1539  ax-ie2 1540  ax-4 1556  ax-17 1572  ax-ial 1580  ax-ext 2211

This theorem depends on definitions:  df-bi 117  df-cleq 2222  df-clel 2225

This theorem is referenced by:  rabsnt  3744  exmid1stab  4296  0elnn  4715  canth  5964  tfrexlem  6495  rdgtfr  6535  rdgruledefgg  6536  exmidonfinlem  7394  hashinfom  11030  swrds1  11239  ennnfonelemhom  13026  fnpr2ob  13413  upgrex  15944  wlkl1loop  16155