Raj Raizada

I'll try making some simple @desmos.com art with my students today. The only "math" part of this is the geometric dilation with a list of scale factors: the rest is just drawing with the Geometry polygon tool. So, mostly fun, but some learning too!
www.desmos.com/geometry/why...
#iTeachMath #MathSky

Here's a Halloween-themed @desmos.com geometry activity, in case anyone is looking for one. Task: transform the black witch's hat onto the orange one. The first few screens use constructions, and the rest use coordinate transformations.
classroom.amplify.com/activity/690...
#iTeachMath #MathSky

Thanks!

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

Have you noticed a change of colors? 🍁

You can now define colors in the 3D calculator that depend directly on coordinates. 📝 Learn more in the Desmos Help Center: help.desmos.com/hc/en-us/art... #iteachmath #mathsky

@greggdcaruso.bsky.social @justincaouette.bsky.social @wiringthebrain.bsky.social @unfilosofo.bsky.social @clist.bsky.social @philosobobby.bsky.social @robynrwaller.bsky.social @ksifferd.bsky.social @annelijefferson.bsky.social @danspeak.bsky.social @philosopherjoe.bsky.social

I saw this poster in NYC, and was struck by how it (unintentionally) embodies a key tension in the philosophy of free will. We tend to be determinist when forgiving people we feel sympathy for, and libertarian when criticizing views that we dislike.

Some Halloween @desmos.com art 🎃
www.desmos.com/calculator/z...
#iTeachMath #MathSky

Harris’s Hawk takes flight

New yardbird! Harris’s Hawks aren’t terribly uncommon but this is a first for our east Tucson yard ☀️🪶🌵

Thanks! You folks made it all possible! 🤩😍🙏

Thanks! Congrats on becoming a Desmos Fellow, by the way! I remember seeing your post on that recently

Complex function domain-colouring of roots of unity, in @desmos.com
Here's the graph:
www.desmos.com/3d/hadt9rebbe
They recently enabled colouring a surface using functions, so far only in 3D grapher. Side-effect: allows complex domain colouring, using 3D tool as a 2D one! #iTeachMath #MathSky

Thanks!

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

Every Artist Has a Favorite Subject. For Some, That’s Math.

There's a nice article by Siobhan Roberts about the Bridges 2025 conference in Eindhoven in the NY Times. I can now say that I am in The NY Times! (A photo credit for the shot of Chaim Goodman-Strauss and Edmund Harriss,... but still!) www.nytimes.com/2025/10/10/s...

Borromean rings in @desmos.com 3D: www.desmos.com/3d/nje29p8eqp
#iTeachMath #MathSky

DuaneHabecker bluesky

That is nice! Thanks for sharing it! I like how the area of the rectangle stays constant, even as the specific location of the chord changes. I made a little Desmos version of it, for fun:
www.desmos.com/geometry/jzy...
I wonder if we can persuade this guy to post on BlueSky, as well as on Twitter!

It looks like the Wikipedia page for Mary Brunkow got created literally just this morning, after her Nobel Prize was announced. I had heard that women in academia tend to be somewhat under-represented on Wikipedia, but this is a particularly stark example.
en.wikipedia.org/w/index.php?...

This is great!
A suggestion: maybe post the graph link (or edit the current graph, if that link is not a snapshot?) with m_ode=2, so that the life simulation starts running as soon as someone clicks on it. It took me a couple of min to see how to get the static initial Desmos logo to start running.

I just finished a new website on fractal self-replicating tiles ("reptiles") based on polyominoes, polyhexes, and polyiamonds: www.mathartfun.com/fractaldiver...

I think my geometry students will enjoy making an infinite zoom effect, using the dilation tool in @desmos.com Geometry. Here's an initial attempt. Don't stare at it for too long! 😀
www.desmos.com/geometry/x46...
#iTeachMath

Lorentz attractor in @desmos.com 3D #iTeachMath
www.desmos.com/3d/mnm7duxhew

I googled around a bit and found this website, which makes things very easy: infuse-qr.com

Does this QR code work for your phone? It does with mine. It should take you to my website.

Is this a new piece of Kenny Scharf graffiti on W 57th St? I walked past it this morning and don’t recall seeing it before.

Here is a @desmos.com activity about the symmetry-preserving transformations of a square, inspired by my colleague Tom Jameson.
classroom.amplify.com/activity/68c...
For a really great intro to how this relates to group theory, see this by @stevenstrogatz.com archive.nytimes.com/opinionator....

YouTube video by Aha, That Makes Sense How to make a snowflake in Desmos Geometry

Making pretty patterns is fun. And it can help you to learn geometry! I made a short video about how to make a snowflake in @desmos.com Geometry. Comments and suggestions welcome! #iTeachMath ❄️
www.youtube.com/shorts/EI1RN...

Seen at the MoMA Design Store. @momanyc.bsky.social .
It’s a nicely designed light, but it’s not a hexagon! #

Great to see the NYT launch another math-related puzzle, after their Numbers game got beta-tested and then dropped a couple of years ago

AI should come with green, yellow, and red lights for mental health There is an immediate need for a new, agile process that helps everyday people find safe and trustworthy mental health AI support without stifling innovation.

In a new op-ed, Cornell Tech professor Tanzeem Choudhury and postdoctoral associate Dan Adler argue for a new labelling system for AI-driven mental health tools.

Read more in STAT: www.statnews.com/2025/08/20/c...

@bernhard-werner.de I've been been starting to take a look at Cindy.js, and I noticed that you have done a lot of work on it. It looks like a great framework.

Is there an online discussion/help group for it, e.g. on Discord or somewhere?