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Mirrors > Home > MPE Home > Th. List > axi5r | Structured version Visualization version GIF version |
Description: Converse of axc4 2340 (intuitionistic logic axiom ax-i5r). (Contributed by Jim Kingdon, 31-Dec-2017.) |
Ref | Expression |
---|---|
axi5r | ⊢ ((∀𝑥𝜑 → ∀𝑥𝜓) → ∀𝑥(∀𝑥𝜑 → 𝜓)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | hba1 2301 | . . 3 ⊢ (∀𝑥𝜑 → ∀𝑥∀𝑥𝜑) | |
2 | hba1 2301 | . . 3 ⊢ (∀𝑥𝜓 → ∀𝑥∀𝑥𝜓) | |
3 | 1, 2 | hbim 2307 | . 2 ⊢ ((∀𝑥𝜑 → ∀𝑥𝜓) → ∀𝑥(∀𝑥𝜑 → ∀𝑥𝜓)) |
4 | sp 2182 | . . 3 ⊢ (∀𝑥𝜓 → 𝜓) | |
5 | 4 | imim2i 16 | . 2 ⊢ ((∀𝑥𝜑 → ∀𝑥𝜓) → (∀𝑥𝜑 → 𝜓)) |
6 | 3, 5 | alrimih 1824 | 1 ⊢ ((∀𝑥𝜑 → ∀𝑥𝜓) → ∀𝑥(∀𝑥𝜑 → 𝜓)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∀wal 1535 |
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-10 2145 ax-12 2177 |
This theorem depends on definitions: df-bi 209 df-or 844 df-ex 1781 df-nf 1785 |
This theorem is referenced by: (None) |
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