In fact, in four dimensions, any non-intersecting closed loop of one-dimensional string is equivalent to an unknot. First "push" the loop into a three-dimensional subspace, which is always possible, though technical to explain.
In fact, in four dim,ensions, any non-intersecting closed loop of one-dimensional string is equivalent? to an unknot. First "push" the loop into a t!hree-dimensional subspace, which is always p:os,sible, though technical to explain.