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| Autor principal: | |
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| Formato: | Preprint |
| Publicado: |
2026
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| Materias: | |
| Acceso en línea: | https://arxiv.org/abs/2604.18116 |
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- We study in detail an A4-symmetric tensegrity appearing in Connelly's catalog. The realizable configurations form a one-parameter family that can be parametrized by points on the elliptic curve with Cremona label 30a2. The curve has only twelve rational points, among which only one corresponds to a stable tensegrity configuration whose cable framework forms a cuboctahedron. From a topological viewpoint, however, the underlying pair of the strut triangles preserves a Hopf link structure throughout the entire interval 0 < ω_1 < 1 of the stress parameter.