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Mirrors > Home > MPE Home > Th. List > jca | Structured version Visualization version GIF version |
Description: Deduce conjunction of the consequents of two implications ("join consequents with 'and'"). Deduction form of pm3.2 472 and pm3.2i 473. Its associated deduction is jcad 515. Equivalent to the natural deduction rule ∧ I (∧ introduction), see natded 28182. (Contributed by NM, 3-Jan-1993.) (Proof shortened by Wolf Lammen, 25-Oct-2012.) |
Ref | Expression |
---|---|
jca.1 | ⊢ (𝜑 → 𝜓) |
jca.2 | ⊢ (𝜑 → 𝜒) |
Ref | Expression |
---|---|
jca | ⊢ (𝜑 → (𝜓 ∧ 𝜒)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | jca.1 | . 2 ⊢ (𝜑 → 𝜓) | |
2 | jca.2 | . 2 ⊢ (𝜑 → 𝜒) | |
3 | pm3.2 472 | . 2 ⊢ (𝜓 → (𝜒 → (𝜓 ∧ 𝜒))) | |
4 | 1, 2, 3 | sylc 65 | 1 ⊢ (𝜑 → (𝜓 ∧ 𝜒)) |
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