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Solution: ‘How Many Half-Lives?’
When do negative results from a half-life experiment mean a theory is dead?
Graph Isomorphism Vanquished — Again
Just five days after posting a retraction, László Babai announced that he had fixed the error in his landmark graph isomorphism algorithm.
How Many Half-Lives Do You Have?
Gaining an intuition about half-life requires some unintuitive thinking.
How Curvature Makes a Shape a Shape
The ancient study of an object’s curvature is guiding mathematicians toward a new understanding of simple equations.
Complexity Theory Problem Strikes Back
The legendary graph isomorphism problem may be harder than a 2015 result seemed to suggest.
Test Your Mathematical Sculpting Skills
Can you turn a two-dimensional fractal into a 3-D object? Break out your scissors and tape for a chance to win a 3-D printed sculpture.
3-D Fractals Offer Clues to Complex Systems
By folding fractals into 3-D objects, a mathematical duo hopes to gain new insight into simple equations.
Solution: ‘Hanging Far Out Over the Edge’
A simple and elegant way to stack identical flat objects so that they project over an edge as far as possible.
The Math That’s Too Difficult for Physics
How do physicists reconstruct what really happened in a particle collision? Through calculations that are so challenging that, in some cases, they simply can’t be done. Yet.