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Below and in the tables there are drawings of inflatable objects with a particular curved surface.Figure:A, B, CFigure D, E, F1, F2Figure G1, G2Object A with one center is always a sphere. Spheres have a synclastic surface. Objects with one centerpoint in combination with a changing radius do not exist. Object B and D with a parallel circular sectionon a straight line have always a monoclastic surface. Objects C and E have a synclastic and anticlasticpart following the curved centerline. At the “inner site” of the center curve the surface is anticlastic; at the“outer side” the surface is synclastic. Object F has a non-linear changing radius. If the radius changes in aprogressive way, the surface is anticlastic. If the radius changes in a regressive way, the surface is synclastic.Object G is a combination of a curved center line and a non-linear changing radius. Both features willgive a double curvature. They can stimulate or de-stimulate each other. They stimulate each other in thecombination of outer side of the center curve and regressive curvature to a synclastic surface. In the case ofthe inner site of the center curve and progressive changing radius they stimulate each other to an anticlasticsurface. In the other two combinations (inner site of the curve – regressive changing radius and outer side ofthe curve and progressive changing radius) the feature with the strongest surface curvature will determinethe result. Below a scheme with the features and curvatures. The color of the scheme is corresponding to thecolor of the inflatable object below. The green arrow in object G shows the place where a synclastic surfaceswaps to and anticlastic surface as a result of the strong curvature of the center line although the change ofthe radius is repressive. The purple arrow in object G shows the place where an anticlastic surface swaps tosynclastic surface as a result of the strong curvature of the center line, although the change of the radius isprogressive.Table 230