| ⊦ v ∈ avols ∧ m < # avols[v] ∧ ebm-cons(avols) → (ebm-cons(avols[v, avols[v][m, leb]]) ↔ valid-leb(avols[v][m]) → valid-leb(leb)) |
m < # avols[v], ebm-cons(avols), v ∈ avols ⊦ ebm-cons(avols[v, avols[v][m, leb]]) ↔ valid-leb(avols[v][m]) → valid-leb(leb)