a. w. walker

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Tag Archives: greedy algorithm

Fractal Sets and Arithmetic Progressions

February 14, 2020by Alexander Walker Leave a comment

If a set of positive integers contains no arithmetic progressions, how large can it be? In this post, we study this question in the context of harmonic sums.

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algorithms, computation, number theory

Calendars for the Modern Age

February 18, 2017by Alexander Walker Leave a comment

Our modern calendar, the Gregorian calendar, introduced several changes to the Julian calendar, including the introduction of a three-step algorithm for determining leap years.

But just how accurate is the Gregorian model? Can centuries of mathematics and astronomy lead us to a more accurate calendar?

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algorithms, math history, number theory

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You have stumbled upon the personal blog of Alex Walker. I am a number theorist and a Heilbronn fellow at UCL.

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