# Category Archives: pattern

## Finding prefix and repetend length

We interrupt your regularly scheduled primality testing to bring you something else fun I’ve been thinking about. It’s well-known that any rational number has a decimal expansion that either terminates, or is eventually periodic—that is, the digits after the decimal … Continue reading

Posted in number theory, pattern | Tagged , , , | 2 Comments

## Post without words #23

Posted in pattern, pictures, posts without words | Tagged , , , | 11 Comments

## Some words on PWW #22

There are lots of patterns to be found in the picture from my previous post! This is a really remarkable tiling. Here are a few special properties I know of: First of all, I hope you realized that the pattern … Continue reading

Posted in geometry, pattern | Tagged , , , | 9 Comments

## Post without words #22

Posted in geometry, pattern | Tagged , , , , , | 13 Comments

## 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

Posted in pattern, pictures, posts without words | Tagged , , , , , | Comments Off on From primitive roots to Euclid’s orchard

## 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

Posted in pattern, pictures, posts without words | Tagged , , | 7 Comments

## Post without words #19

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

## Post without words #18

Posted in pattern, pictures, posts without words | Tagged , , , , , , | 5 Comments

## Post without words #17

Posted in pattern, pictures, posts without words | Tagged , , , , | 5 Comments