syl5 - Metamath Proof Explorer syl5 - Intuitionistic Logic Explorer Hypothesis Ref Expression syl5.1 ⊢(𝜑→𝜓) syl5.2 ⊢(𝜒→(𝜓→𝜃)) Assertion Ref Expression syl5 ⊢(𝜒→(𝜑→𝜃)) Proof of Theorem com12 Step Hyp Ref Expression 1 syl5.1 ⊢(𝜑→𝜓) 2 1 a1i ⊢…