Kengo Kawamura
Journal of Knot Theory and Its Ramifications, 30(05) 2150029, 17pp-2150029, Jun 15, 2021 Peer-reviewed
We introduce the notion of bicolored diagrams which are closely related to the region crossing changes. Moreover, we refine Cheng’s results on the region crossing changes and propose a certain way to calculate the Arf invariant of a proper link using a bicolored diagram.