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| Mirrors > Home > MPE Home > Th. List > a1i | Structured version Visualization version GIF version | ||
| Description: Inference introducing an antecedent. Inference associated with ax-1 6. Its associated inference is a1ii 2. See conventions 30346 for a definition of "associated inference". (Contributed by NM, 29-Dec-1992.) | 
| Ref | Expression | 
|---|---|
| a1i.1 | ⊢ 𝜑 | 
| Ref | Expression | 
|---|---|
| a1i | ⊢ (𝜓 → 𝜑) | 
| Step | Hyp | Ref | Expression | 
|---|---|---|---|
| 1 | a1i.1 | . 2 ⊢ 𝜑 | |
| 2 | ax-1 6 | . 2 ⊢ (𝜑 → (𝜓 → 𝜑)) | |
| 3 | 1, 2 | ax-mp 5 | 1 ⊢ (𝜓 → 𝜑) | 
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