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Mirrors > Home > MPE Home > Th. List > 19.42-1 | Structured version Visualization version GIF version |
Description: One direction of 19.42 2105. (Contributed by Wolf Lammen, 10-Jul-2021.) |
Ref | Expression |
---|---|
19.42.1 | ⊢ Ⅎ𝑥𝜑 |
Ref | Expression |
---|---|
19.42-1 | ⊢ ((𝜑 ∧ ∃𝑥𝜓) → ∃𝑥(𝜑 ∧ 𝜓)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 19.42.1 | . . 3 ⊢ Ⅎ𝑥𝜑 | |
2 | pm3.2 463 | . . 3 ⊢ (𝜑 → (𝜓 → (𝜑 ∧ 𝜓))) | |
3 | 1, 2 | eximd 2085 | . 2 ⊢ (𝜑 → (∃𝑥𝜓 → ∃𝑥(𝜑 ∧ 𝜓))) |
4 | 3 | imp 445 | 1 ⊢ ((𝜑 ∧ ∃𝑥𝜓) → ∃𝑥(𝜑 ∧ 𝜓)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 384 ∃wex 1704 Ⅎwnf 1708 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1722 ax-4 1737 ax-5 1839 ax-6 1888 ax-7 1935 ax-12 2047 |
This theorem depends on definitions: df-bi 197 df-an 386 df-ex 1705 df-nf 1710 |
This theorem is referenced by: bnj596 30816 |
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