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Mirrors > Home > MPE Home > Th. List > rsp | Structured version Visualization version GIF version |
Description: Restricted specialization. (Contributed by NM, 17-Oct-1996.) |
Ref | Expression |
---|---|
rsp | ⊢ (∀𝑥 ∈ 𝐴 𝜑 → (𝑥 ∈ 𝐴 → 𝜑)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-ral 3070 | . 2 ⊢ (∀𝑥 ∈ 𝐴 𝜑 ↔ ∀𝑥(𝑥 ∈ 𝐴 → 𝜑)) | |
2 | sp 2177 | . 2 ⊢ (∀𝑥(𝑥 ∈ 𝐴 → 𝜑) → (𝑥 ∈ 𝐴 → 𝜑)) | |
3 | 1, 2 | sylbi 216 | 1 ⊢ (∀𝑥 ∈ 𝐴 𝜑 → (𝑥 ∈ 𝐴 → 𝜑)) |
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