the torus knot of type (2,0) consists of two untied circumpherences. You can see what happens when we increase the second of the two numbers that identify the knot.
See also the interactive animation Two numbers for a knot.
immagine di Gian Marco Todesco
The image belongs to the sections...:
From "fragments of topology" (From "XlaTangente")
Images from the topology section (From the exhibitions of matematita)
Two components knots (Topology)
Knots described by two numbers (Topology)