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Mirrors > Home > MPE Home > Th. List > eqeltrid | Structured version Visualization version GIF version |
Description: A membership and equality inference. (Contributed by NM, 4-Jan-2006.) |
Ref | Expression |
---|---|
eqeltrid.1 | ⊢ 𝐴 = 𝐵 |
eqeltrid.2 | ⊢ (𝜑 → 𝐵 ∈ 𝐶) |
Ref | Expression |
---|---|
eqeltrid | ⊢ (𝜑 → 𝐴 ∈ 𝐶) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | eqeltrid.1 | . . 3 ⊢ 𝐴 = 𝐵 | |
2 | 1 | a1i 11 | . 2 ⊢ (𝜑 → 𝐴 = 𝐵) |
3 | eqeltrid.2 | . 2 ⊢ (𝜑 → 𝐵 ∈ 𝐶) | |
4 | 2, 3 | eqeltrd 2839 | 1 ⊢ (𝜑 → 𝐴 ∈ 𝐶) |
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