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Mirrors > Home > MPE Home > Th. List > mpd | Structured version Visualization version GIF version |
Description: A modus ponens deduction. A translation of natural deduction rule → E (→ elimination), see natded 28776. Deduction form of ax-mp 5. Inference associated with a2i 14. Commuted form of mpcom 38. (Contributed by NM, 29-Dec-1992.) |
Ref | Expression |
---|---|
mpd.1 | ⊢ (𝜑 → 𝜓) |
mpd.2 | ⊢ (𝜑 → (𝜓 → 𝜒)) |
Ref | Expression |
---|---|
mpd | ⊢ (𝜑 → 𝜒) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | mpd.1 | . 2 ⊢ (𝜑 → 𝜓) | |
2 | mpd.2 | . . 3 ⊢ (𝜑 → (𝜓 → 𝜒)) | |
3 | 2 | a2i 14 | . 2 ⊢ ((𝜑 → 𝜓) → (𝜑 → 𝜒)) |
4 | 1, 3 | ax-mp 5 | 1 ⊢ (𝜑 → 𝜒) |
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