`Laplacian`¶

Laplacian of a scalar field.

$ wo 'Laplacian[x^2 + y^2, {x, y}]'
4

A third argument selects an orthogonal coordinate system.

$ wo 'Laplacian[Log[r], {r, t}, "Polar"]'
0

$ wo 'Laplacian[r^3, {r, t, p}, "Spherical"]'
12*r

Laplacian¶