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Mirrors > Home > MPE Home > Th. List > Mathboxes > frege16 | Structured version Visualization version GIF version |
Description: A closed form of com34 91. Proposition 16 of [Frege1879] p. 38. (Contributed by RP, 24-Dec-2019.) (Proof modification is discouraged.) |
Ref | Expression |
---|---|
frege16 | ⊢ ((𝜑 → (𝜓 → (𝜒 → (𝜃 → 𝜏)))) → (𝜑 → (𝜓 → (𝜃 → (𝜒 → 𝜏))))) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | frege12 40872 | . 2 ⊢ ((𝜓 → (𝜒 → (𝜃 → 𝜏))) → (𝜓 → (𝜃 → (𝜒 → 𝜏)))) | |
2 | frege5 40859 | . 2 ⊢ (((𝜓 → (𝜒 → (𝜃 → 𝜏))) → (𝜓 → (𝜃 → (𝜒 → 𝜏)))) → ((𝜑 → (𝜓 → (𝜒 → (𝜃 → 𝜏)))) → (𝜑 → (𝜓 → (𝜃 → (𝜒 → 𝜏)))))) | |
3 | 1, 2 | ax-mp 5 | 1 ⊢ ((𝜑 → (𝜓 → (𝜒 → (𝜃 → 𝜏)))) → (𝜑 → (𝜓 → (𝜃 → (𝜒 → 𝜏))))) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 |
This theorem was proved from axioms: ax-mp 5 ax-frege1 40849 ax-frege2 40850 ax-frege8 40868 |
This theorem is referenced by: frege18 40877 frege22 40878 frege17 40880 |
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