# del

Del, also known as **alted** or **nabla**, is the vector
operator Δ, expressed in Cartesian
coordinates as

The product of Δ and a scalar *S* yields a vector field called grad *S* (the gradient of *S*):

The scalar product of Δ with a vector **V** is the divergence
of **V** (div); the vector product of Δ with **V** is the curl of **V**.