The Challenge: Can you find the 4, 5 and 6 crossing knots?
Materials needed: Patience, creativity, paper, pencil, maybe some strips of t shirts and a safety pin?
If you follow that thread, you’ll get loads of instructions, but the gist is this: A mathematical knot is a closed loop, and it’s called a #-crossing knot based on the minimum number of crossings. Untangle it as much as you can. Two knots are the same if you can mess them around and get them to have the same projection. These two, for example, are the same:
Can you find the 4, 5 and 6 crossing knots?