"Link concordance"@en . . . . . . . . . . . "In mathematics, two links and are concordant if there exists an embedding such that and . By its nature, link concordance is an equivalence relation. It is weaker than isotopy, and stronger than homotopy: isotopy implies concordance implies homotopy. A link is a slice link if it is concordant to the unlink."@en . . . . . . . . "1117925310"^^ . . . . . . . . "2571"^^ . . . . . . . . . . . . "In mathematics, two links and are concordant if there exists an embedding such that and . By its nature, link concordance is an equivalence relation. It is weaker than isotopy, and stronger than homotopy: isotopy implies concordance implies homotopy. A link is a slice link if it is concordant to the unlink."@en . . . . . . "17519029"^^ .