threshold-combined

Adding blur and threshold distorts the dual graph.

Sam is a PhD student at Durham Univeristy working on structures in the solar wind. His pastimes include pestering Clare about Linux and making Adam feel old. Seriously, who remembers the 90s?

Chalkdust dissertation prize 2025
Calling all final-year students! This is your opportunity to get your work published as a Chalkdust article.
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?
The big argument: What’s the best way to end a proof?
QED or $\square$?
The history of pi
What is pi? How do we define it and who first thought of it? We explore the history of this quintessential mathematical constant.
Issue 06
Cardioids in coffee cups, counting with three fingers, and breakfast at Villani's. Plus the return of all your favourite fun pages in our autumn 2017 issue.