411 REFERENCE · Wiktionary
Hopf link
Reference material by Wiktionary contributors. This retains its source identity and is not 411 news reporting.
English
thumb|a Hopf link
Hopf links
Etymology
From en Hopf link. From being an interlinkage named after en Heinz Hopf.
Noun
en topology The simplest interlinkage of two loops; two interlinked rings.