imaginary number

How high is your frustum?

How calculating the height of a frustum gave a glimpse of the mathematical frontier.

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Beauty in mathematics
Surein Aziz explores one of the most beautiful equations in mathematics
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Riemann zeta function
The music of the primes
Following on from his article 'The prime number lottery' in last issue of Plus, Marcus du Sautoy continues his exploration of the greatest unsolved problem of mathematics: The Riemann Hypothesis.
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