I am looking for a 4D angular coordinate system (radius and three angles) and its corresponding "hypervolume element".(adsbygoogle = window.adsbygoogle || []).push({});

2D: polar coordinates - dA = r dr dtheta

3D: spherical coordinates - dV = r^2 sin(phi) dphi dtheta dr

4D: ?

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# 4D angular coordinate system and corresponding hypervolume element

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