People, It is often needed to provide y>0 : y > 0 for y = suc _ (y : ℕ). Using lib-0.7, I write s≤s z≤n in place of y>0. Then, I see that this is not so readable, and I replace this further with suc>0, with adding the function suc>0 : ∀ {m} → suc m > 0 suc>0 = s≤s z≤n But may be I am missing something simple in the library? Thanks, ------ Sergei