exact sequences logo

exact sequences

Subscribe
Archives
April 7, 2025

swords into teddy bears

Resolute readers,

I bring you some popular mathematics, a reminder about Wednesday's NYC reading, and some recently admired art.

Math first! I wrote the April AMS Feature Column about one of the most adorably named theorems I know, which I've translated as "The Teddy-Lambkin Theorem". I realized I didn't have time to learn 3D modeling, so I made illustrations the old-fashioned way, with polymer clay. Here are my semialgebraic bear and sheep after I'd just pulled them out of the oven:

Clay models of a teddy bear and sheep made with lots of slightly squished white spheres

I used Warhammer model paint to color the white clay, which means this gentle brown is Bloodreaver Flesh color--proof, perhaps, that one can always turn a sword into a teddy bear.

The KGB reading in Manhattan is coming up fast! If you will be in New York City on Wednesday the 9th, please join us:

Fantastic Fiction reading series promo image with photos of Andrea Hairston and me, smiling broadly, against a background of color-enhanced galaxies

Fantastic Fiction also has a podcast; if you can't make it, there will be a chance to listen later.

I spent Saturday at a protest that began on the steps of the Detroit Institute of Arts and stretched along Woodward Avenue. I saw some tremendous signs, including painted portraits of Ruth Bader Ginsburg and Frida Kahlo, a hostile cardboard cybertruck in bas-relief, a bold declaration that "The revolution will not be televised," and a hopeful Elmo. Before the protest started, I visited some less ephemeral art. Tiff Massey's sculpture installation made me think about the commonalities between my childhood in 1980s Baltimore and her childhood in 1980s Detroit. A different special exhibit featured nineteenth-century embroideries with faces in watercolor and leaves and dresses in feathered silk. Here I am admiring the world.

My masked face and camera appear in a mirror behind an embroidered circle showing a nineteenth-century map of the Americas

Meanwhile Kosmas and Gennoveus have been practicing tessellations:

An orange tabby cat and a black cat curled on an unevenly folded quilt

I hope your coziness supports your adventures (and vice versa).

Yours very truly,

Ursula.

Don't miss what's next. Subscribe to exact sequences:
X
This email brought to you by Buttondown, the easiest way to start and grow your newsletter.