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Raj Raizada @rajraizada.bsky.social · 2h

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!

DuaneHabecker bluesky

www.desmos.com

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Raj Raizada @rajraizada.bsky.social · 2d

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?...

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Raj Raizada @rajraizada.bsky.social · 3d

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.

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Reposted by Raj Raizada

robertfathauer.bsky.social @robertfathauer.bsky.social · 6d

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

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Raj Raizada @rajraizada.bsky.social · 7d

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

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Raj Raizada @rajraizada.bsky.social · 10d

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

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Raj Raizada @rajraizada.bsky.social · 10d

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.

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Raj Raizada @rajraizada.bsky.social · 16d

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.

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Raj Raizada @rajraizada.bsky.social · 16d

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....

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Raj Raizada @rajraizada.bsky.social · 23d

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...

How to make a snowflake in Desmos Geometry

YouTube video by Aha, That Makes Sense

www.youtube.com

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Raj Raizada @rajraizada.bsky.social · Aug 30

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

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Raj Raizada @rajraizada.bsky.social · Aug 26

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

Deb Amlen @debamlen.bsky.social · Aug 18

Psst ... From the "New Toy" Department at NYT Games: a logic puzzle! Go git it!

www.nytimes.com/games/pips?f...

Play Pips, our new dominoes game for all skill levels.

Every domino has a spot. Can you find where each belongs?

www.nytimes.com

Reposted by Raj Raizada

Cornell Tech @cornelltech.bsky.social · Aug 21

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...

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.

www.statnews.com

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Raj Raizada @rajraizada.bsky.social · Aug 15

@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?

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Raj Raizada @rajraizada.bsky.social · Aug 13

I can relate to travel constraints getting in the way of things. However, at least the seeds have been sown for some good future discussions!

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Raj Raizada @rajraizada.bsky.social · Aug 13

This talk by Erik Demaine was great. And I very much enjoyed the talk by Dave Richeson on the game Left, Center, Right too!

Dave Richeson @divbyzero.bsky.social · Aug 13

Yesterday at the MoMath MOVES conference, Erik Demaine discussed QR codes and showed examples of how to incorporate images into them so they are still scannable. I had to give it a try. This QR code should take you to my website.

A QR code showing a pixelated version of my face.

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Raj Raizada @rajraizada.bsky.social · Aug 11

Am enjoying attending the @momath.bsky.social MOVES conference at @nyucourant.bsky.social
Any other BlueSky folks here?
momath.org/moves-confer...

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Raj Raizada @rajraizada.bsky.social · Aug 7

I found out what it's called: a Brianchon point. The concurrency comes from the main Brianchon's theorem for concurrency in a hexagon of conic tangents: it is a projective dual of Pascal's theorem. If you combine three pairs of the six edges, then you get a triangle.
en.wikipedia.org/wiki/Brianch...

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Raj Raizada @rajraizada.bsky.social · Aug 7

Interesting. I don’t think that’s quite correct, though. A projection that deforms a circle to a given ellipse would also thereby deform the triangle to a single fixed outcome. However, multiple triangles can be tangent to the same ellipse. Similarly, concurrency has constraints, e.g. Ceva’s theorem

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