Follow the links to what you are interested
Equivalence of Knots and Links:
To study whether they are the same.
The trefoil knot.
The figure eight knot.
The Whitehead link.
, or the trivial knot.
The Perko pair
Classifications of Knots
There are many ways to put knots into different groups.
To see some invariants developed by mathematicians.
The linking number.