Any fixed point or certain basis.
A cylindrical mechanical fastener that attaches multiple parts together by fitting through a hole and deforming the head(s) at either end.
To command the attention of.
To attach or fasten parts by using rivets.
To make firm or immovable.
To install rivets.
To decouple; to remove a link from, or separate the links of.
To delete (a file).
A link that is equivalent (under ambient isotopy) to finitely many disjoint circles in the plane.