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Mirrors > Home > MPE Home > Th. List > elin1d | Structured version Visualization version GIF version |
Description: Elementhood in the first set of an intersection - deduction version. (Contributed by Thierry Arnoux, 3-May-2020.) |
Ref | Expression |
---|---|
elin1d.1 | ⊢ (𝜑 → 𝑋 ∈ (𝐴 ∩ 𝐵)) |
Ref | Expression |
---|---|
elin1d | ⊢ (𝜑 → 𝑋 ∈ 𝐴) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | elin1d.1 | . 2 ⊢ (𝜑 → 𝑋 ∈ (𝐴 ∩ 𝐵)) | |
2 | elinel1 4224 | . 2 ⊢ (𝑋 ∈ (𝐴 ∩ 𝐵) → 𝑋 ∈ 𝐴) | |
3 | 1, 2 | syl 17 | 1 ⊢ (𝜑 → 𝑋 ∈ 𝐴) |
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