Equation Icon  g(buffer zone) = η ⊕ r∕ℛ ⊕ r2∕ℛ2 ⊕ ... 2 ⊕ m ∕r ⊕ m ∕ℛ ⊕ mr ∕ℛ ⊕ ... ⊕ m2 ∕r2 ⊕ m2 ∕(rℛ ) ⊕ m2 ∕ℛ2 ⊕ ... ⊕ ... (558 )