Category Archives: pictures

A few words about PWW #27

The images in my last post were particular realizations of the famous Sieve of Eratosthenes. The basic idea of the sieve is to repeatedly do the following: Circle the next number bigger than that is not yet crossed out, call … Continue reading

Posted in pattern, pictures, posts without words, primes | Tagged , , | 4 Comments

Post without words #27

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Post without words #23

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From primitive roots to Euclid’s orchard

Commenter Snowball pointed out the similarity between Euclid’s Orchard… …and this picture of primitive roots I made a year ago: At first I didn’t see the connection, but Snowball was absolutely right. Once I understood it, I made this little … Continue reading

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A few words about PWW #20

A couple commenters quickly figured out what my previous post without words was about. The dots making up the image are at integer grid points , with the center at . There is a dot at if and only if … Continue reading

Posted in pattern, pictures, posts without words | Tagged , , | 10 Comments

Post without words #20

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Post without words #19

Posted in pattern, pictures, posts without words | Tagged , , , , , , | 2 Comments