Clasper (mathematics)

In mathematics, "Clasper" refers to a tool or device used in the study of knot theory and low-dimensional topology. Specifically, a clasper is a specific type of graph-like structure that can be used to manipulate knots and links. Claspers can be thought of as a generalization of the notion of a "knot insertion" and are used to define operations that can alter the topology of a knot or link.