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Mirrors > Home > MPE Home > Th. List > r19.21biOLD | Structured version Visualization version GIF version |
Description: Obsolete version of r19.21bi 3208 as of 11-Jun-2023. (Contributed by NM, 20-Nov-1994.) (Proof shortened by Wolf Lammen, 1-Jan-2020.) (Proof modification is discouraged.) (New usage is discouraged.) |
Ref | Expression |
---|---|
r19.21bi.1 | ⊢ (𝜑 → ∀𝑥 ∈ 𝐴 𝜓) |
Ref | Expression |
---|---|
r19.21biOLD | ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝜓) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | r19.21bi.1 | . . 3 ⊢ (𝜑 → ∀𝑥 ∈ 𝐴 𝜓) | |
2 | rsp 3205 | . . 3 ⊢ (∀𝑥 ∈ 𝐴 𝜓 → (𝑥 ∈ 𝐴 → 𝜓)) | |
3 | 1, 2 | syl 17 | . 2 ⊢ (𝜑 → (𝑥 ∈ 𝐴 → 𝜓)) |
4 | 3 | imp 409 | 1 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝜓) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 398 ∈ wcel 2114 ∀wral 3138 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1970 ax-7 2015 ax-12 2177 |
This theorem depends on definitions: df-bi 209 df-an 399 df-ex 1781 df-ral 3143 |
This theorem is referenced by: (None) |
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