Sphinx

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Index Entry

"Four planes of the tetrahedron going through the same

point at the same time: The zero volume terahedron: Also

this is the vector equilibrium:

Tetrahedron as simplest structure in Universe:

"Tetrahedron as four closest-packed spheres:

"Head of the Sphinx is cross section vertically of vector

equilibrium:

Citations

1. RBF postcard to Peter Jahlin, 28 Sep'73