Assertion: tetrahedron's vertex | /r/CapableOf | define third axis
Facets:
value: in this mapping
type: LOCATION
Source sentences:
text: This represents a geometric folding of the D 6 to H 3 Coxeter groups: Seen by these 2D Coxeter plane orthogonal projections, the two overlapping central vertices define the third axis in this mapping.