NSurfaceIntegrate

NSurfaceIntegrate[f,{x,y,…}∈surface] computes the numerical scalar surface integral of the function f[x,y,…] over the surface.

NSurfaceIntegrate[{p,q,…},{x,y,…}∈surface] computes the numerical vector surface integral of the vector field {p[x,y,…],q[x,y,…],…}.

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