| ⊦ v ∈ vols ∧ m < # vols[v] ∧ vols[v][m] = ⌜n0⌝ ∧ valid-ebatbl(apebs, wlar, vols, m0) → mapped-pebs(vols[v, vols[v][m, ⌜n1⌝ ]]) = (mapped-pebs(vols) -- n0) ++ n1 |
vols[v][m] = ⌜n0⌝ , m < # vols[v], valid-ebatbl(apebs, wlar, vols, m0), v ∈ vols ⊦ mapped-pebs(vols[v, vols[v][m, ⌜n1⌝ ]]) = (mapped-pebs(vols) -- n0) ++ n1