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Volume formula for a $\mathbb{Z}_2$-symmetric spherical tetrahedron through its edge lengths
Published 22 Jul 2010 in math.MG, math.CV, and math.DG | (1007.3948v8)
Abstract: The present paper considers volume formulae, as well as trigonometric identities, that hold for a tetrahedron in 3-dimensional spherical space of constant sectional curvature +1. The tetrahedron possesses a certain symmetry: namely rotation through angle $\pi$ in the middle points of a certain pair of its skew edges.
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