Part of “Complexity Theory,” a new column on the tangled questions of our technological age. On June 18, Facebook formally announced plans to build Libra, a cryptocurrency available to Facebook users ...

They say a bird in the hand is worth two in the bush, but for computer scientists, two birds in a hole are better still. That’s because those cohabiting birds are the protagonists of a deceptively ...

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The prolific researcher found deep connections between randomness and computation and spent a career influencing cryptographers, complexity researchers and more. For more than 40 years, Avi Wigderson ...