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RBF Definitions
“The only polar symmetry of a tetrahedron is between the midpoints of the opposite edges. These midpoints are 90 degrees to one another. Starting with any one of the polar edges the lines converge toward the terminals of the opposite edge. The four faces of a tetrahedron are in polar opposition in such a manner that as one of the pairs of faces converges the other pair of faces diverges. Here is the balance of Universe between radiation and gravity.”
