The Y-triangle move does not preserve Intrinsic Knottedness
  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. 
Erica Flapan and Ramin Naimi
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