## Math Photo: Triangles and Reflections

In most ways this is a sorrowful triangle, but on this day it was remarkably beautiful.

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## Math Photo: Spherical Garden

Here’s a lovely art installation at the top of Prospect Park in Brooklyn. This is Public Water from Mary Mattingly, and you can learn more here. I wonder what kind of relationship this artist has with mathematics.

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## Proof in a Poem

Inspired by Hannah Hoffman, here’s a poem proof of the irrationality of the square root of 2.

Suppose that root 2 could be taken to be
The integer a over the integer b
Where a and b have no factor in common
So nothing divides both the top and the bottom

Some algebra that’s quite easy to do
Gives a2 is equal to b2 times 2
But if a2 is even, so too must be a
Now each a in a2 has a 2 in our play

So a2 in fact has a factor of 4
But since this equals 2b2 we can say more
This b2 must now have a factor of 2
And just as above we know b has one too

It appears that we are now able to say
That 2 divides b and 2 divides a
But common factors were assumed to be none
So this contradiction shows we are done

Be sure to check out the excellent efforts of Timothy Gowers and Joel David Hamkins as well.

Here’s the original tweet.

## Math Photo — Window Patterns

There’s so much math in these window arrangements. I see patterns, permutations, and partitions. It’s like an ancient scroll showing examples of a primitive counting system.

## Math Meets Art Exhibit — Columbus Academy

I’m proud to have several photographs on display in Math Meets Art, an exhibit currently running at Columbus Academy in Columbus, Ohio. The exhibit is curated by Chris Bolognese, and features a diverse collection of work from artists, mathematicians, teachers, and students.

I was honored to be invited to participate, and even more honored that mathematician and artist Robert Bosch took a selfie with my contributions!

You can see more of the wonderful work on display in Chris Bolognese’s Twitter feed.

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