Justin Solomon

A photo with a lego Luxo Junior set, modified so that it sheds light on the ball, also made of lego, and on a glass ball with a galaxy in it, and an authentic SIGGRAPH 1998 T-Shift, with a bit faded colors.

It's time to visit an old friend ...

There were signs
- A nice Luxo lego under the tree
- This year's TOG paper, a nice story to tell;
- Embarked the TPC with Miri Ben-Chen and @justinmsolomon.bsky.social;
- My daughter came with my old T-Shirt

ACM SIGGRAPH, happy to see you again !
#siggraph2026

Image credit: Stephanie Atherton, Marina Levay, Ualibyek Nurgulan, Shree Singhi, Erendiro Pedro; "Topology Control: Training a DeepSDF" (mentor Paul Kry): summergeometry.org/sgi2025/topo...

Check out these websites to see projects and reports by our SGI 2021/2022/2023/2024/2025 Fellows: summergeometry.org/sgi2021/ summergeometry.org/sgi2022/ summergeometry.org/sgi2023/ summergeometry.org/sgi2024/
summergeometry.org/sgi2025/

Program dates July 6-August 14, 2026. Applications due February 18; reach out with questions (reply here or email jsolomon@mit.edu). There will be a separate call for mentors+volunteers. We strongly encourage women and students from underrepresented/underserved groups to apply.

Announcing SGI 2026! Undergrads and MS students: Apply for 6 weeks of paid summer geometry processing research. No experience needed: 1 week tutorials + 5 weeks of projects. Mentors are top researchers in this emerging branch of graphics/computing/math. sgi.mit.edu

Justin Solomon

Very nice profile of our group’s research by @csail.mit.edu — geometry is everywhere! cap.csail.mit.edu/engage/spotl...

Re “not a translation tool” — this example came up when a student in my class used ChatGPT to translate their homework solutions before submitting. So I don’t think it’s obvious that users (including smart MIT students) think critically about the difference.

It’d be a different situation if the AI said “I think you made a mistake” instead of silently changing the text. And again while “factual error” in this specific case is unambiguous, I think it’s likely similar substitutions are being made that are subtler.

I’m not sure an inexperienced user is likely to understand the “default” is to change your text if it sees fit. This example illustrates that it’s not just a translation algorithm—these tools digest/edit the text (eg map onto a math book). This example is obvious, others might not be.

When prompted to translate text, ChatGPT (in this case version 4o) also fixes a math mistake without telling the user it did so. This might feel like a feature but to me it illustrates a serious flaw: People using AI tools as "intermediaries" might not have their text faithfully translated.

Response to the ‘Compact for Academic Excellence in Higher Education’ | Office of the President

Dartmouth response to the Trump Administration Compact

president.dartmouth.edu/news/2025/10...

By the way, I was involved with a committee of ACM SIGGRAPH (a large computer graphics conference) which in 2022 wrote a similar guide for new researchers. Some of this is specific to that field, but it also has useful tutorial material for all fields.

(@justinmsolomon.bsky.social)

Must be the issue

And once again in lecture I demonstrate that it’s impossible to correctly row reduce a 3x3 matrix by hand in front of 50 people.

AI overview google results for “how many more days until halloween” saying “There are 137 days until Halloween (October 31), as today’s date is June 14th, 2024.”

i think my job as “Guy Who Counts Down to Halloween” is safe for now

Contact me for more information or with ideas for how to support this proven, high quality, and unique program.

(Image credit: Shree Singhi, SGI 2025 Fellow)

If you work in industry, please connect us to your company as a sponsor, which will bring access to a large network of top talent with specialized training in geometry, vision, graphics, learning, and other fields. If you have possible connections to funders, please facilitate!

We just wrapped up the 5th Summer Geometry Initiative (SGI), bringing 30 Fellows to our cohort of 150+ alumni, who go on to PhD/MS programs, industry jobs, and more. Despite overwhelming success, SGI26 is uncertain thanks to the changing funding landscape. Please help by helping identify sponsors!

What I get when I ask for a cello arrangement

I will be singing this. How should I interpret the final line that ends with “a r n O”

One of our papers included a series of matrices I could prove existed but struggled to compute by estimating stochastically, PCA, squaring to remove sqrt(2), guessing, and proving a posteriori that they’re right. Took my student David another few years to get a direct proof via representation theory

Boston!!!

Big stretch!

I can see why! 🦷

So cute! His ears are perfect.

OMG I love him!! That face!!

Had one of the most bizarre/strangely memorable days of my academic career. Feel free to send cute pet photos while I dissociate in the Vancouver airport for a bit.

Both, but these days most of my students are far more concerned about re-entering the U.S. What a year.

I could not be more disappointed in the management of SIGGRAPH for this, the most spineless of PR blog posts.

Count me as someone who will not have their name on any submission to SIGAsia 2026. If enough of us withhold the content they sorely need, maybe next time they will engage more earnestly.

Mark your calendars for the #SIGGRAPH 2025 Thesis Fast Forward in-person event. Recent PhD graduates will present their thesis work and answer questions on Monday 11 August, 10:30-11:30am: s2025.conference-schedule.org/presentation...