Rigidity

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Not to be confused with Rigor.

Rigid or rigidity may refer to:

  • In mathematics and physics:
    • Stiffness, the property of a solid body to resist deformation, which is sometimes referred to as rigidity
    • Structural rigidity, a mathematical theory of the stiffness of ensembles of rigid objects connected by hinges
    • Rigidity (electromagnetism), the resistance of a charged particle to deflection by a magnetic field
    • Rigidity (mathematics), a property of a collection of mathematical objects (for instance sets or functions)
    • Rigid body, in physics, a simplification of the concept of an object to allow for modelling.
    • Rigid transformation, in mathematics, a rigid transformation preserves distances between every pair of points.
  • In medicine:
    • Rigidity (neurology), an increase in muscle tone leading to a resistance to passive movement throughout the range of motion
    • Rigidity (psychology), an obstacle to problem solving which arises from over-dependence on prior experiences