Jim C

@jimconant.bsky.social

Math guy

A stranger on LinkedIn, who asked me a strangely ill-posed basic trigonometry question, followed up by letting me know he wanted to share his progress on the Navier-Stokes equation.

Very excited to have posted my preprint, produced with the help of Claude Fable 5, settling an old conjecture of mine from 2006, which I am calling "The Mod 4 Kawauchi Conjecture." Feedback and comments welcome. arxiv.org/abs/2607.18655

A proof of the mod 4 Kawauchi Conjecture

Kawauchi conjectured that the Conway polynomial of an amphicheiral knot factors as $\nabla_K(z)=f(z)f(-z)$ for some integer polynomial $z$. In joint work with Hartley, he showed this was true for stro...

arxiv.org

Claude Fable helped me prove a conjecture of mine from 2006. Yesterday I was 90% convinced that the proof was correct. Today I am 100% convinced.

“The vehicle attempted to flee the scene and, fearing for public safety, an officer discharged his weapon.” Fleeing. The vehicle was driving away. That’s murder. A legal resident of the United States is now dead. The threat to public safety is ICE. It must be eliminated.

Homeland Security: On July 13, 2026, at approximately 7:00 AM ET, ICE was conducting targeted surveillance on the last known address of an illegal alien with a final order of removal. An illegal alien departed the residence in a vehicle. ICE law enforcement attempted to conduct a vehicle stop. The vehicle attempted to flee the scene and, fearing for public safety, an officer discharged his weapon.

The driver of the vehicle was struck, and emergency services were immediately contacted. He passed away from his injuries. 
 
The Biddeford Police Department and FBI responded to the scene. DHS OIG has been notified and like all discharge of firearms this will be investigated. This is a developing situation, and we will update the public when more information is available.

When I was a kid, audio cassettes (often called simply "tapes") were big. They were small and easy to play on portable devices. Their big defect was the tape would often unspool and jam. You'd have to straighten it out and then tighten the spool with a pencil.

Some of my favorite electronic albums: Bernd Kistenmacher: Wake up in the sun (1987) Jason Lescaleet: The Pilgrim (2006) Adelbert von Deyen: Atmosphere (1980), Sternzeit (1978) Klaus Schulze: Cyborg (1973), Kontinuum (2007), Timewind (1975) 1/n

Reducing my caffeine intake for the nth time, lol. I quit a couple of years ago, and felt really good after about a week, but somehow managed to relapse. I just got a smartwatch which found I was lacking in deep sleep, so I am seeing if caffeine is the culprit. Caffeine withdrawal is brutal.

Reading The Handmaid's Tale for the first time, which I got from my Mom's bookshelves. Atwood is a brilliant author. I had previously read the Oryx and Crake trilogy, which was compelling post-apocalyptic fiction.

I never got into cyberpunk back in the day. I've since read Snowcrash, which I didn't particularly like [I've enjoyed other Neal Stephenson novels though], and the first book in Tad Williams's Otherland series, which I found so insipid that I didn't read the rest of the series.

Just watched Gross Pointe Blank again after seeing it in the theaters back in the 90s. I didn't really like it back then, and although I liked it better the second time, the tonal shifts between humor and violence just didn't do it for me. It would have been more coherent without a rom-com ending.🧵

If the kids in the birthright citizenship dispute are not "subject to the jurisdiction of the united states," would that not mean they have diplomatic immunity and can not be prosecuted in US courts?