In geometry, the infinite-order apeirogonal tiling is a regular tiling of the hyperbolic plane. It has Schläfli symbol of, which means it has countably infinitely many apeirogons around all its ideal vertices.
This tiling represents the fundamental domains of *∞∞ symmetry.
This tiling can also be alternately colored in the [(∞,∞,∞)] symmetry from 3 generator positions.
The union of this tiling and its dual can be seen as orthogonal red and blue lines here, and combined define the lines of a *2∞2∞ fundamental domain.
a or = ∪