Description: Derivation of ax-1 from adh-minimp and ax-mp . Polish prefix notation: CpCqp . (Contributed by BJ, 4-Apr-2021) (Revised by ADH, 10-Nov-2023) (Proof modification is discouraged.) (New usage is discouraged.)
Ref | Expression | ||
---|---|---|---|
Assertion | adh-minimp-ax1 | ⊢ ( 𝜑 → ( 𝜓 → 𝜑 ) ) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | adh-minimp-sylsimp | ⊢ ( ( ( 𝜑 → 𝜓 ) → 𝜑 ) → ( 𝜓 → 𝜑 ) ) | |
2 | adh-minimp-sylsimp | ⊢ ( ( ( ( 𝜑 → 𝜓 ) → 𝜑 ) → ( 𝜓 → 𝜑 ) ) → ( 𝜑 → ( 𝜓 → 𝜑 ) ) ) | |
3 | 1 2 | ax-mp | ⊢ ( 𝜑 → ( 𝜓 → 𝜑 ) ) |