 Torus knot

For coprime integers $p,q$, the torus knot $T_{p,q}$ winds $p$ times meridionally and $q$ times longitudinally on an unknotted torus in $S^3$.

A torus knot is a special type of knot that is tied on the surface of a torus (a doughnut-shaped surface). More formally, a torus knot is defined by two integers \( p \) and \( q \), where \( p \) represents the number of times the knot winds around the torus's central axis (the "hole" of the doughnut) and \( q \) represents the number of times it wraps around the torus itself.