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math.GT2022
Determinants of Simple Theta Curves and Symmetric Graphs
Matthew Elpers, Rayan Ibrahim, Allison H. Moore
A theta curve is a spatial embedding of the -graph in the three-sphere, taken up to ambient isotopy. We define the determinant of a theta curve as an integer-valued invariant ar…
math.GT2022
Primality of theta-curves with proper rational tangle unknotting number one
Kenneth L. Baker, Dorothy Buck, Danielle O'Donnol +2
We show that if a composite -curve has (proper rational) unknotting number one, then it is the order 2 sum of a (proper rational) unknotting number one knot and a trivial -cu…