T(r,θ,z)=(rcos θ,rsen θ,z);S=[0,3]×[0,π/2]×[0,1]T (r, \theta, z) = (r cos\; \theta, r sen\; \theta, z); S = [0, 3] \times [0, \pi/2] \times [0, 1]T(r,θ,z)=(rcosθ,rsenθ,z);S=[0,3]×[0,π/2]×[0,1] en el espacio rθzr\theta zrθz