A magazine for the mathematically curious

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threshold-combined

Published 8 March 2025 at 1094 × 525 in On the cover: Voronoi diagrams and generative art

Adding blur and threshold distorts the dual graph.

Sam is a maths student at Durham University where he hosts
Chalkboard Ultra podcast and spends too much time thinking about the Standard Model and Mexican hats. If he’s not pestering Adam then he can definitely be found playing the keytar in a funk band completely unrelated to quantum field theory.

A symmetric universe
Sam Kay reflects on building a universe
The big argument: Should we write another issue?
How much barrel is left to scrape?
Chalkdust issue 20 – Coming 8 November
Pre-order your copy of our 9½-year anniversary issue now!
The big argument: What’s the best way to end a proof?
QED or $\square$?
Constructing a sphere with 455 cups
Paper cups do not follow a hexagonal pattern and the cones do not meet at a single point, but they do make a gigantic sphere
The Housekeeper and the Professor
Memory and maths in the modern world