CUHK MATH Linking Number
LINKING NUMBER--HARDER EXAMPLES!
Tie me up, Tie me down
 
Equivalence
Trefoil
Figure Eight
Whitehead
Trivial Knot
Perko Pairs
 
Classifications
Torus Knots
Alternating Knots
 
Invariants
Crossing number
Bridge number
Unknotting number
Tricolorability
Linking number
Polynomials
There can be many different links by simply putting three rings together. The following pictures shows a number of them, and you can create more.
Can you observe that they are actually the same?
Any two rings (example, red and green) are not linked. They are held together by the third ring.
How about these two? Do you think they are the same?


Linking Number Bring me back to the menu of linking number.
Challenging Questions Come on! Do you have guts to try these?