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Bruna

Taming complexity

Maria Bruna has won a Whitehead Prize for finding a systematic way of simplifying complex systems.
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How to add up quickly

The number pi can be expressed beautifully in terms of infinite sums. For practical purposes though, these sums are rather disappointing: they converge slowly, so you need to sum a large number of terms to get accurate estimates of pi. Here's a clever way to make them converge faster.