Heptagonal-enneagonal duotegum
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| Heptagonal-enneagonal duotegum | |
|---|---|
| Rank | 4 |
| Type | Uniform dual |
| Space | Spherical |
| Notation | |
| Coxeter diagram | m7o2m9o |
| Elements | |
| Cells | 63 digonal disphenoids |
| Faces | 63+63 isosceles triangles |
| Edges | 7+9+63 |
| Vertices | 7+9 |
| Vertex figure | 9 heptagonal tegums, 7 enneagonal tegums |
| Measures (edge length 1) | |
| Central density | 1 |
| Related polytopes | |
| Dual | Heptagonal-enneagonal duoprism |
| Conjugates | Heptagonal-enneagrammic duotegum, Heptagonal-great enneagrammic duotegum, Heptagrammic-enneagonal duotegum, Heptagrammic-enneagrammic duotegum, Heptagrammic-great enneagrammic duotegum, Great heptagrammic-enneagonal duotegum, Great heptagrammic-enneagrammic duotegum, Great heptagrammic-great enneagrammic duotegum |
| Abstract & topological properties | |
| Euler characteristic | 0 |
| Orientable | Yes |
| Properties | |
| Symmetry | I2(7)×I2(9), order 252 |
| Convex | Yes |
| Nature | Tame |
The heptagonal-enneagonal duotegum, also known as the 7-9 duotegum, is a duotegum that consists of 63 digonal disphenoids and 16 vertices.
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