The definition of a conchoid surface is: rc[u, v] = r[u, v] + k (r[u, v] - P)/Norm[r[u, v] - P] and rc[u, v] = r[u, v] - k (r[u, v] - P)/Norm[r[u, v] - P], P is the pole, k distance and r[u, v] the base surface. In this notebook we will obtain the conchoid surface of the an ellipsoid: {3 Cos[u]Cos[v], 2 Sin[u]Cos[v], 2 Sin[v]} with the distance k = 1.5 and as pole P = {0, 0, 1.5}.
