Bronze Tri-Color Graph, Figure 1

Sculpture with a welded framework of 1/4 bronze rods into four tetrahedra, each placed at the ends of a larger tetrahedron, so that holes drilled into the ends of the smaller tetrahedra could be used as the sixteen vertices of the graph. With a special jig to hold the small rods in position at the precise angle (arccos(-1/2) = 109.74 degrees) to produce regular tetrahedra. Plastic fishing line becomes the edges of those tetrahedra.https://orb.binghamton.edu/mathematical_sculptures/1039/thumbnail.jp