64 tetrahedron grid encodes 22:33
22:33=4:6=16:18=7:9
1+2+3+4+5+6+7=28=(7 tetractys)
1+2+3+4+5+6+7+8+9=45=(9 tetractys)
28+45=73=(64 tetrahedron grid)
top of page
64 TETRAHEDRON GRID E8 STRING THEORY
bottom of page
22:33=4:6=16:18=7:9
1+2+3+4+5+6+7=28=(7 tetractys)
1+2+3+4+5+6+7+8+9=45=(9 tetractys)
28+45=73=(64 tetrahedron grid)