fromWIRED2 days agoScienceUnpicking How to Measure the Complexity of KnotsComputing a knot's unknotting number—how many crossing changes are needed to turn it into an unknot—is a complex, difficult problem.
fromwww.scientificamerican.com2 months agoScienceNew Knot Theory Discovery Overturns Long-Held Mathematical AssumptionA composite knot can have an unknotting number smaller than the sum of its components' unknotting numbers.
fromwww.scientificamerican.com2 months agoScienceNew Knot Theory Discovery Overturns Long-Held Mathematical Assumption
