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Mirrors > Home > MPE Home > Th. List > reximi | Structured version Visualization version GIF version |
Description: Inference quantifying both antecedent and consequent. (Contributed by NM, 18-Oct-1996.) |
Ref | Expression |
---|---|
reximi.1 | ⊢ (𝜑 → 𝜓) |
Ref | Expression |
---|---|
reximi | ⊢ (∃𝑥 ∈ 𝐴 𝜑 → ∃𝑥 ∈ 𝐴 𝜓) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | reximi.1 | . . 3 ⊢ (𝜑 → 𝜓) | |
2 | 1 | a1i 11 | . 2 ⊢ (𝑥 ∈ 𝐴 → (𝜑 → 𝜓)) |
3 | 2 | reximia 3172 | 1 ⊢ (∃𝑥 ∈ 𝐴 𝜑 → ∃𝑥 ∈ 𝐴 𝜓) |
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