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math.GT2013
Goeritz Invariant of Torus Links
K. Ahara, S. Watanabe
We obtain the full list of Goeritz invariants of all torus knots and links.
math.GT2012
An integral region choice problem on knot projection
Kazushi Ahara, Masaaki Suzuki
In this paper we propose {\it a region choice problem} for a knot projection. This problem is an integral extension of Shimizu's 'region crossing change unknotting operation.' We s…