unistable

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English

Etymology

From uni- +‎ stable.

Adjective

unistable (not comparable)

  1. (mathematics, of a polyhedron) stable when resting on one of its faces
    • 1970, Research Paper, page 22:
      24. Are there unistable polyhedra with less than 19 faces? / A unistable polyhedron is one which when made of material of uniform density, will rest in stable equilibrium on only one of its faces.
    • 1979, IEEE Computer Society, Exploding Technology, Responsible Growth: Digest of Papers, pages 158, 159:
      There are two basic types of amorphous materials—the unistable and the bistable. The unistable material is one in which there are no structural changes. [] The mechanisms for carrier control in the unistable materials are electronic.
    • 1990, Murray S. Klamkin, Problems in Applied Mathematics: Selections from SIAM Review, Society for Industrial and Applied Mathematics, →ISBN, page 478:
      (b) What is the least dimension, if any, in which a simplex can be unistable? If the condition of uniform density of material is relaxed, then a simplex can be unistable in 3 dimensions.

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