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In geometry, theMurakami–Yano formula, introduced byMurakami & Yano (2005), is a formula for the volume of ahyperbolic or sphericaltetrahedron given in terms of itsdihedral angles.

• Murakami, Jun; Yano, Masakazu (2005),"On the volume of a hyperbolic and spherical tetrahedron",Communications in Analysis and Geometry,13 (2):379–400,ISSN 1019-8385,MR 2154824, archived fromthe original(PDF) on 2012-04-10, retrieved2012-02-10 url=http://www.f.waseda.jp/murakami/papers/tetrahedronrev4.pdf

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