alternating

alternating

1. present participle of alternate

alternating (not comparable)

1. That alternates.
2. (mathematics, of a knot) Having a planar diagram whose crossings alternate between "over" and "under" as one travels along the knot.
3. (mathematics, of a series) Having terms that alternate between positive and negative.
4. (mathematics, of a multilinear mapping with all arguments belonging to the same space) Whose value is zero when any two adjacent arguments are equal.

• alternating current

• Alternating multilinear map on Wikipedia.Wikipedia