Brunnian link

In knot theory, a branch of topology, a Brunnian link is a nontrivial link that becomes a set of trivial unlinked circles if any one component is removed. In other words, cutting any loop frees all the other loops (so that no two loops can be directly linked).

The name Brunnian is after Hermann Brunn. Brunn's 1892 article Über Verkettung included examples of such links.

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