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Complex numbers: Power

In this video mathematician Chris Budd explains why complex numbers are essential in keeping the lights on.
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John D. Barrow: Zero is a hero

This talk traces the history of zero, looks at its role in maths and science, and even finds a link to the London Underground map.
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A quick chat with Stephen Smale

In this short clip the Fields medallist tells us about his bad marks at school and his fascinatingly eclectic work as a mathematician.