| http://www.w3.org/ns/prov#value | - This is an equation of a hyper sphere, and can not be graphed directly, but can be observed in a similar way we observed a 3d sphere.if we let q = 0, we obtain the 3d equation x^2 + y^2 + z^2 = r^2, Instead of level curves we have level surfaces, where the 3d sphere is the surface at different levels of q = k where k is a constant.
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