What is a virtual link

@article{Kuperberg2003WhatIA,
  title={What is a virtual link},
  author={Greg Kuperberg},
  journal={Algebraic \& Geometric Topology},
  year={2003},
  volume={3},
  pages={587-591}
}
  • G. Kuperberg
  • Published 5 August 2002
  • Philosophy
  • Algebraic & Geometric Topology
Several authors have recently studied virtual knots and links because they admit invariants arising from R-matrices. We prove that every virtual link is uniquely represented by a link L SI in a thickened, compact, oriented surface S such that the link complement (SI)nL has no essential vertical cylinder. AMS Classication 57M25; 57M27 57M15 

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