Module differential 

Symbolic differential operators over the CAS, built on differentiate/simplify.

Functions

curl

Curl ∇×F of a 3-D field. Requires exactly 3 components and 3 variables [x,y,z]. Returns [ ∂Fz/∂y−∂Fy/∂z , ∂Fx/∂z−∂Fz/∂x , ∂Fy/∂x−∂Fx/∂y ].

divergence

Divergence ∇·F = Σ ∂Fᵢ/∂xᵢ. Requires field.len() == vars.len().

gradient

∇f = [∂f/∂x₁, …, ∂f/∂xₙ].

laplacian

Laplacian ∇²f = Σ ∂²f/∂xᵢ².