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Order-8 octagonal tiling : ウィキペディア英語版 | Order-8 octagonal tiling
In geometry, the order-8 octagonal tiling is a regular tiling of the hyperbolic plane. It has Schläfli symbol of and is self-dual. == Symmetry == This tiling represents a hyperbolic kaleidoscope of 8 mirrors meeting at a point and bounding regular octagon fundamental domains. This symmetry by orbifold notation is called *44444444 with 8 order-4 mirror intersections. In Coxeter notation can be represented as (), removing two of three mirrors (passing through the octagon center) in the () symmetry.
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