Buckminster Fuller on the Isotropic Vector Matrix

When the centers of equiradius spheres in closest packing are joined by most economical lines, an isotropic vector matrix is disclosed – `isotropic’ meaning `everywhere the same’. This matrix constitutes an array of equilateral triangles that corresponds with the comprehensive coordination of nature’s most economical, most comfortable, structural interrelationships… Remove the spheres and leave the vectors, and you have the octahedron-tetrahedron complex, the octet truss, the isotropic vector matrix.