On the volume and Chern-Simons invariant for 2-bridge knot orbifolds

초록

This paper extends the work by Mednykh and Rasskazov presented in [On the structure of the canonical fundamental set for the 2-bridge link orbifolds, Universitat Bielefeld, Sonderforschungsbereich 343, Discrete Structuren in der Mathematik, Preprint (1988), pp. 98-062, www. mathematik. uni-bielefeld. de/sfb343/preprints/pr98062.ps.gz]. By using their approach, we derive the Riley-Mednykh polynomial for a family of 2-bridge knot orbifolds. As a result, we obtain explicit formulae for the volumes and Chern- Simons invariants of orbifolds and cone-manifolds on the knot with Conway's notation C(2n, 4).

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