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Plus magazine opens a door to the world of maths, with all its beauty and applications, by providing articles from the top mathematicians and science writers on topics as diverse as art, medicine, cosmology and sport. You can read the latest mathematical news on the site every week, browse our blog, listen to our podcasts and subscribe to our fortnightly email newsletter.

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Issue 55 of Plus

It's ten years since the first draft of the human genome was published and Plus is joining in the celebrations with a package on the maths of genes. We try and solve the genome puzzle, model cell suicide, and find out why DNA evidence in court isn't as straightforward as it seems. Genes aside, we assess small but lethal risks, create some fractal music, encounter a two box paradox, and find out how to win with coins and cards.

 

"It's a match!" cries the CSI. At first glance it might seem that if the police have matched a suspect's DNA to evidence from the crime scene, then the case is closed. But some statistical thinking is required to understand exactly what a match is, and importantly, how juries should assess this as part of the evidence in a trial.

Two computer geeks claim to have calculated the number pi to 5 trillion digits — on a single desktop and in record time. That's 2.3 trillion digits more than the previous world record held by the Frenchman Fabrice Bellard.

We talk to Simon Singh, winner of the Leelavati Prize for public outreach in maths, at the International Congress of Mathematicians 2010.

Results in mathematics come in several flavours — theorems are the big important results, conjectures will be important results one day when they are proved, and lemmas are small results that are just stepping stones on the way to the big stuff. Right? Then why has the Fields medal just been awarded to Ng&ocirc Bào Châu for his proof of a lemma?

By cleverly cross-referencing different databases it can be possible for evil adversaries to reveal intimate information about individuals. Given that it's hard these days to keep your details off these databases, what can be done to protect privacy? We talk to Cynthia Dwork from Microsoft, whose talk at the ICM showcases some mathematical tools to keep our details safe.