Torsion

From Wikipedia, the free encyclopedia

The term torsion may refer the following:

• In mathematics, measuring curvature of some sort:
  • Torsion of curves
  • Torsion tensor in differential geometry
  • Analytic torsion (also called Ray-Singer torsion)
  • Reidemeister torsion (also called R-torsion, Franz torsion, de Rham torsion)
  • Whitehead torsion
• The second is algebraic, relating to the set of elements that vanish (e.g., elements of finite order).
  • Torsion (algebra)
  • Tor functor

• In medicine:
  • Testicular torsion
  • Bloat

• In physics and engineering:
  • Torsion (mechanics)
  • Torsion coefficient
  • Torsion pendulum
  • Torsion spring or -bar
  • Torsion field

• In biology:
  • Torsion (gastropod), a developmental feature of all gastropods