Links (knot theory)

ornament with two doubly-interlinked loops

in knot theory, a set of knots that do not intersect but are intertwined

two interlinked loops with five structural crossings

interlinked multi-loop construction where cutting one loop frees all the others

In the mathematical field of knot theory, an unlink is a link that is equivalent (under ambient isotopy) to finitely many disjoint circles in the plane.