The Coming Out of a Transgender Scientist "I know that I am making the right decision because whenever I think about changing my gender role, I am flooded with feelings of relief."

We're disappointed to see Ben Barres's powerful book "The Autobiography of a Transgender Scientist" among the ~400 titles removed from the Naval Academy Library. Needless to say, we're proud to have published his book and will keep it — and his memory — alive.

Giant cardioid: version 2.5. Version 1.0 was made using Pex tubing and grommet tape. Version 2.0 was made from laser-cut pieces. The wood was too fragile, and it broke during construction. In version 2.5, I made the pieces wider and I used thicker wood. Success, I'd say! The diameter is about 5 ft.

Tagging @jclevelandtran.com

Understanding geometry through model making

Love!!! ❤️

Hi Blue Sky! I edit the Journal of Humanistic Mathematics. We publish articles, essays, #fiction & #poetry on doing, teaching & living of #mathematics. So far we had more than 850K full-text downloads of our content - why not check us out? scholarship.claremont.edu/jhm/ #math #openaccess #mathart

A polynomial #visualpattern

The new surface-colouring option in @desmos.com 3D allows a cute way of visualizing conic sections.
www.desmos.com/3d/fiv5gnltdl
(The option to have translucent surfaces doesn't save with the graph itself, so needs to be re-toggled on. It's important for seeing the full curves)
#MathSky #iTeachMath

A photo of BraidTiles

I met with my knot theory independent study students today. The topic: braids. I broke out these "BraidTiles" that I made several years ago. You can download a printable pdf here (recommendation: print them on cardstock): divisbyzero.com/2019/05/01/b...

Images from my math teaching life yesterday and today. #mtbos

😃 Now you can define colors in the @desmos 3D calculator that depend directly on coordinates.
www.desmos.com/3d/s40shr66rn

🌈 😃 Now you can now define colors in the @Desmos 3D calculator that depend directly on coordinates.
www.desmos.com/3d/42d0f0d88f

A screenshot of an interactive program for exploring the geometry of plane linear transformations, showing a 2x2 matrix, the action of the linear transformation T having that standard matrix, and the eigenspace(s) of T.

Free Online Math Materials

A blog post on linear algebra, taken from the students' preface to my free (gratis) book, with links to interactive software for matrix multiplication and exploring the geometry of linear transformations.

www.diffgeom.com/blogs/about-...

#MathSky #ITeachMath

I snorted. Thank you.

About to do triangle congruency methods, which is the exact topic that Jesse Spano overdosed on caffeine pills to study

new @cshor.org pset 🏃💨

drive.google.com/file/d/1NaXQ...

screenshots of PDF pages 1, 2, 3, and 10 below

cc #iTeachMath ♾️
bcc #MathSky 🧮

Triangle w complex periodic orbit.

It is *still* unknown whether or not every triangle admits a periodic billiard trajectory. Every triangle with rational angles does. And so does every obtuse triangle of at most 112.4 deg. "112.5 appears to be a natural barrier."
gwtokarsky.github.io. #MathSky #Mathematics #Geometry #Billiards

Announcing the next MAA President and Vice President!

Edray Goins will serve as MAA President-Elect and Yvonne Lai as Vice President starting July 1, 2026. Learn more about their vision and leadership: https://maa.org/news/announcing-the-next-maa-president-and-vice-president/

A selection of integrals and the structure of their solutions, linked by an arrow labelled “integrates like”

Today I realised that “integrates like” is the phrase I’ve been missing for talking about spotting the structure of an integral. #ALevelMaths #MathsToday

Timeline palate-cleanser: some pretty geometry in @desmos.com
www.desmos.com/geometry/wgp...
#iTeachMath #MathSky

In the Pokémon TCG Pocket app, I would earn 10 points for winning a match and lose 7 points when losing a match. However, you also get a win streak bonus – the second win in a row gets a bonus of 3 points, the third gets 6, the fourth 9, and the fifth (and all subsequent) gets 12. Assuming I have a win rate of 50% (which I did at the time), what’s my expected value for playing n games? (How many games would I expect to play to earn x points?)

I recently worked on a fun problem involved the Pokémon TCG. Here's a post about the problem and my thought process/solution. jclevelandtran.com/2025/10/15/s...

I’m jealous of everyone in your audience!

I’m rooting for you!

a million years later, this is still the neatest thing I've ever made, with huge help to the person at TMC13 (!) who figured out how to make the planets orbit www.desmos.com/calculator/d...

Dittttttto!

Particular Parabola Problems

[digging through my twittxr archives]

do you want non-routine quadratic problems?

here are 20 💌:
www.desmos.com/calculator/d...

cc. #iTeachMath #MathSky #EduSky #AlgebraSky

Oh no! Sending you all the care!

I just took a train on Friday and was in the quiet car and it was heaven! My trip was only 2.5 hours though.

(Mathhombre) Miscellanea Very nice! The calculations will get a little funky since the rule is a little different for those squares that have larger squares on bothe sides.

Loved this HS student's #fractal, so #geogebra'd it up mathhombre.tumblr.com/post/7970450... #mathart

Your animosity to bananas grows…