| http://www.w3.org/ns/prov#value | - FIG. 6 is for a case where the correspondence points Pm, Qm are taken on the given section curves, and FIG. 7 is for a case where they are taken on the reference curves (FIGS. 6(b) and 7(b) show examples of curved surfaces created by the present invention, and FIGS. 6(
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