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Mirrors > Home > MPE Home > Th. List > moan | Structured version Visualization version GIF version |
Description: "At most one" is still the case when a conjunct is added. (Contributed by NM, 22-Apr-1995.) |
Ref | Expression |
---|---|
moan | ⊢ (∃*𝑥𝜑 → ∃*𝑥(𝜓 ∧ 𝜑)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | simpr 487 | . 2 ⊢ ((𝜓 ∧ 𝜑) → 𝜑) | |
2 | 1 | moimi 2627 | 1 ⊢ (∃*𝑥𝜑 → ∃*𝑥(𝜓 ∧ 𝜑)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 398 ∃*wmo 2620 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 |
This theorem depends on definitions: df-bi 209 df-an 399 df-ex 1781 df-mo 2622 |
This theorem is referenced by: moani 2637 mooran1 2639 moanimlem 2703 mormo 3429 rmoan 3730 |
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