Metamath Proof Explorer
Description: Inference conjoining the consequents of two implications. (Contributed by Rodolfo Medina, 17-Oct-2010)
|
|
Ref |
Expression |
|
Hypotheses |
jca2r.1 |
⊢ ( 𝜑 → ( 𝜓 → 𝜒 ) ) |
|
|
jca2r.2 |
⊢ ( 𝜓 → 𝜃 ) |
|
Assertion |
jca2r |
⊢ ( 𝜑 → ( 𝜓 → ( 𝜃 ∧ 𝜒 ) ) ) |
Proof
Step |
Hyp |
Ref |
Expression |
1 |
|
jca2r.1 |
⊢ ( 𝜑 → ( 𝜓 → 𝜒 ) ) |
2 |
|
jca2r.2 |
⊢ ( 𝜓 → 𝜃 ) |
3 |
2
|
a1i |
⊢ ( 𝜑 → ( 𝜓 → 𝜃 ) ) |
4 |
3 1
|
jcad |
⊢ ( 𝜑 → ( 𝜓 → ( 𝜃 ∧ 𝜒 ) ) ) |