3 1 Further Notes and Views

The trefoil is perhaps the easiest knot to find in "nature", and is topologically equivalent to the interlaced form of the common Christian and pagan "triquetra" symbol [11]:

Mike Hutchings' Rope Trick [1]	Thurston's Trefoil - Figure Eight Trick [2]	A Kenyan Stone [3]	A Knotted Box [4]
A trefoil near the Hollander York Gallery [5]	A Knotted Pencil [6]	The NeverEnding Story is a connected sum of two trefoils. [7]	Logo of Caixa Geral de Depositos, Lisboa [8]
Banco Do Brasil [9]	A hagfish tying itself in a knot to escape capture. [10]	A basic form of the interlaced Triquetra; as a Christian symbol, it refers to the Trinity	One version of the Germanic "Valknut" symbol