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Mirrors > Home > MPE Home > Th. List > r19.29a | Structured version Visualization version GIF version |
Description: A commonly used pattern based on r19.29 3054. (Contributed by Thierry Arnoux, 22-Nov-2017.) |
Ref | Expression |
---|---|
r19.29a.1 | ⊢ (((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ 𝜓) → 𝜒) |
r19.29a.2 | ⊢ (𝜑 → ∃𝑥 ∈ 𝐴 𝜓) |
Ref | Expression |
---|---|
r19.29a | ⊢ (𝜑 → 𝜒) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | nfv 1830 | . 2 ⊢ Ⅎ𝑥𝜑 | |
2 | r19.29a.1 | . 2 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ 𝜓) → 𝜒) | |
3 | r19.29a.2 | . 2 ⊢ (𝜑 → ∃𝑥 ∈ 𝐴 𝜓) | |
4 | 1, 2, 3 | r19.29af 3058 | 1 ⊢ (𝜑 → 𝜒) |
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