The Y-triangle move does not preserve intrinsic knottedness
Erica Flapan, Ramin Naimi · Osaka City University (Osaka City University) · 2008
We answer the question ``Does the Y-triangle move preserve intrinsic knottedness?'' in the negative by giving an example of a graph that is obtained from the intrinsically knotted graph $K_{7}$ by triangle-Y and Y-triangle moves but is not intrinsically knotted.