#knot-theory
#knot-theory

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#unknotting-number

Science

Unpicking How to Measure the Complexity of Knots

Computing a knot's unknotting number—how many crossing changes are needed to turn it into an unknot—is a complex, difficult problem.

fromwww.scientificamerican.com

Science

New Knot Theory Discovery Overturns Long-Held Mathematical Assumption

A composite knot can have an unknotting number smaller than the sum of its components' unknotting numbers.

Science

Unpicking How to Measure the Complexity of Knots

fromwww.scientificamerican.com

Science

New Knot Theory Discovery Overturns Long-Held Mathematical Assumption

more#unknotting-number

fromwww.scientificamerican.com

Can You Solve Math's Knottiest Puzzles?

Find a string. Really. Do it. Now twist, tie and tangle it as much as you like. Finally, attach the two loose ends of your string together to make a closed loop. (This is a crucial step.) What you hold in your hands is one of the most exciting mathematical objects of the 20th century: a knot. (Hopefully you didn't use your headphone wire.)

Science

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