The Y-triangle move does not preserve Intrinsic Knottedness
arXiv:1205.4798
Abstract
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.
5 pages, 2 figures