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On the writhe of non-closed curves

Starostin, EL; On the writhe of non-closed curves. Ch. 26 in: Vol. 36: Physical and Numerical Models in Knot Theory Including Applications to the Life Sciences, ISBN 978-981-256-187-9, World Scientific (2005) 525-545.

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The writhe of a space curve fragment is considered for various boundary conditions. An expression for the writhe as a function of arclength for an arbitrary space curve is obtained. The formula is built on the base of closing the tangent indicatrix with a geodesic. The corresponding closure of a curve in 3-space is explicitly constructed. The addition rule for writhe is formulated. A relationship connecting the writhe with the Gauss integral over the open curve is presented. The single and double regular helical shapes are examined as examples.

Type: Article
Title: On the writhe of non-closed curves
Additional information: 56 pages, 9 figures
Keywords: physics.bio-ph, physics.bio-ph
UCL classification: UCL > School of BEAMS
UCL > School of BEAMS > Faculty of Engineering Science
URI: http://discovery.ucl.ac.uk/id/eprint/84567
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