EntityQ7582069· pop 6· linked from 89 articlessquare knotSign in to saveconnected sum of two trefoil knots with opposite chiralityConnectionsknot theoryEntityconnected sumEntityAlexander polynomialEntitytorus knotEntityprime knotEntitytricolorabilityEntityknotEntitysquareEntityMathWorldEntityreef knotEntityreflectionEntityEric W. WeissteinEntityBorromean ringsEntitygroup isomorphismEntityknotEntitytrefoil knotEntitySolomon's knotEntityunknotEntitylinking numberEntityReidemeister moveEntityCategoriesAlternating knots and linksAmphichiral knots and linksComposite knots and linksKnot theoryPretzel knots and links (mathematics)Slice knots and linksTricolorable knots and linksUnfibered knots and links