Article

## Gradient of a scalar

The result of the application of the distributive vector differential operator ∇, ∇ = i ∂∂x + j ∂∂y + k ∂∂z, to a differentiable scalar function S(x, y, z); thus ∇S = i ∂S∂x + j ∂S∂y + k∂S∂z. The letters i, j, k are symbols for the base vectors…