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Torsion Number

One of a set of numbers defined in terms of an invariant generated by the finite cyclic covering spaces of a Knot complement. The torsion numbers for Knots up to 9 crossings were cataloged by Reidemeister (1948).


Reidemeister, K. Knotentheorie. New York: Chelsea, 1948.

Rolfsen, D. ``Torsion Numbers.'' §6A in Knots and Links. Wilmington, DE: Publish or Perish Press, pp. 145-146, 1976.

© 1996-9 Eric W. Weisstein