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knot-theory

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casson-gordon-signatures

A Python script to compute the Casson-Gordon sigma signatures of two-bridge knots using the weighted vertex numbers of planar triangles ∆(x, y), as described by Casson and Gordon in Cobordism of Classical Knots (Progress in Mathematics, Vol. 62, pp. 181–199, 1986). The script optionally generates plots of the triangles and their lattice points.

  • Updated Aug 13, 2025
  • Python

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