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Complex square rootsHow to take the square root of a complex number — and discover a beautiful new surface in the process.
Euler's formulaThere are a million things in maths named after Leonard Euler. Here's a beautiful formula involving complex numbers.
Tony Hoare: Beyond QuicksortImagine a world without computer errors. Tony Hoare, inventor of the famous Quicksort algorithm, is working on making it possible.
Happy birthday Quicksort!Quicksort is a famous algorithm which celebrates its 60th birthday this year. We explore its clever workings.