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Mirrors > Home > MPE Home > Th. List > 2a1i | Structured version Visualization version GIF version |
Description: Inference introducing two antecedents. Two applications of a1i 11. Inference associated with 2a1 28. (Contributed by Jeff Hankins, 4-Aug-2009.) |
Ref | Expression |
---|---|
2a1i.1 | ⊢ 𝜑 |
Ref | Expression |
---|---|
2a1i | ⊢ (𝜓 → (𝜒 → 𝜑)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 2a1i.1 | . . 3 ⊢ 𝜑 | |
2 | 1 | a1i 11 | . 2 ⊢ (𝜒 → 𝜑) |
3 | 2 | a1i 11 | 1 ⊢ (𝜓 → (𝜒 → 𝜑)) |
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