Equation Icon  ⌊ ⌋ ∂∂𝒟r- ∂∂đ’Ÿâ„ŗ- ∂∂𝒟ℒ- đ’Ĩ = ⌈ ∂𝒩1-∂𝒩1- ∂𝒩1⌉ . (96 ) ∂∂𝒩r2-∂∂đ’Šâ„ŗ2- ∂∂ℒ𝒩2- ∂r ∂â„ŗ ∂ℒ