penrose.cell_+0.123_-0.456.namePosition is the Penrose coordinate after cut-and-project from 5D. The decimal precision encodes the source embedding. Each position is unique — the Penrose tiling is aperiodic.
The Penrose floor is aperiodic — every position is unique. The golden ratio (φ) governs the geometry. When you project a 5D embedding to 2D Penrose coordinates, the position encodes the embedding. The address is the data.
Neighboring cells on the floor are gravitationally related — their vectors compose. Inferences about "what's nearby?" become geometric queries: walk φ steps in the golden direction.