| ebm-cons(avols) ⊦ v ∈ avols, ∀ v0. v0 ∈ avols[v, fill(mkabstractvolume(n), erased)] → ebm-cons(avols[v, fill(mkabstractvolume(n), erased)][v0]) |
ebm-cons(avols), v0 ∈ avols[v, fill(mkabstractvolume(n), erased)] ⊦ ebm-cons(avols[v, fill(mkabstractvolume(n), erased)][v0]), v ∈ avols