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# Category Archives: posts without words

## Post without words #14

(click here for a bigger version)

Posted in pattern, pictures, posts without words
Tagged graph, hypercube, projection, subset, symmetry
14 Comments

## Totient sums

I took a bit of a break to travel to Japan for a conference, but I’m back now to continue the series I started with Post Without Words #10, a follow-up post, and Post Without Words #11. Recall that we … Continue reading