Mathematical research. Mathematician at a blackboard studying probability and Markov chains. Photographed at the Pure and Applied Mathematics Unit at

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Mathematical research. Mathematician at a blackboard studying probability and Markov chains. Photographed at the Pure and Applied Mathematics Unit at the ENS Lyon, France.

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Photo credit: © VINCENT MONCORGE/LOOK AT SCIENCES/SCIENCE PHOTO LIBRARY / Alamy / Afripics
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