Tootfinder

Tensor network algorithm to solve polaron impurity problems
Ruofan Chen, Lei Gu, Chu Guo
https://arxiv.org/abs/2507.05580 https://arx…

Tensor network algorithm to solve polaron impurity problems
The polaron problem is a very old problem in condensed matter physics that dates back to the thirties, but still remain largely unsolved today, especially when electron-electron interaction is taken into consideration. The presence of both electron-electron and electron-phonon interactions in the problem invalidates most existing numerical methods, either computationally too expensive or simply intractable. The continuous time quantum Monte Carlo (CTQMC) methods could tackle this problem, but a…

🤾 Building a giant catcher's mitt on the moon
#moon

Building a giant catcher's mitt on the moon
Members of the space exploration community are always coming up with novel ideas to solve problems that they view as holding back humanity's expansion into the cosmos. One such problem that has become more noticeable of late, due to the failure of several powered lunar landers, is the difficulty of landing on the moon.

I've been thinking back and forth for a few days now about whether to stick with Linux Mint or bite the moral bullet and switch back to Fedora.
And the winner is..... (drum roll): Linux Mint!
All in all, the more justifiable decision for me. I was able to eliminate a few minor problems, for example by connecting the printer via USB instead of just via WLAN. This means that printouts are made immediately and not minutes later. These “ghost fractals” on the desktop have also st…

Exploring Exponential Runge-Kutta Methods: A Survey
Alessia and\`o, Nicol\`o Cangiotti, Mattia Sensi
https://arxiv.org/abs/2507.04024 https://

Exploring Exponential Runge-Kutta Methods: A Survey
In this survey, we provide an in-depth investigation of exponential Runge-Kutta methods for the numerical integration of initial-value problems. These methods offer a valuable synthesis between classical Runge-Kutta methods, introduced more than a century ago, and exponential integrators, which date back to the 1960s. This manuscript presents both a historical analysis of the development of these methods up to the present day and several examples aimed at making the topic accessible to a broad …

Does anyone know how to get a competent Comcast business support engineer to actually talk to you? I've called their support line three times, each time they tried rebooting the modem (saying they would only do this once, liars) and then disconnected me saying that I could call back if I was still having problems.
I have yet to reach even a level 1 support drone.
I'm trying to a) get my CPE password reset because the password in my password manager doesn't work anymor…

I’ve never seen this memory issue on #MacOS before. I had left Safari with Mela’s share sheet/importer app snippet open overnight and came back to a nearly unresponsive computer. I assume one of these has a memory leak. I was able to reboot via the shell using SSH from another device.

Make your voices heard.
I also added something to a few bugs. @… really needs to go back to the drawing board and think about whose problems they are trying to solve. Because who is this proposal for? The only beneficiaries are AI companies.

Cowboys’ Micah Parsons hints at ability to play offense with incredible high school highlights https://www.sportingnews.com/us/nfl/dallas-cowboys/news/cowboys-micah-parsons-hints-abi…

Bin wieder hier! I'm back here!
All problems solved. Still glad to have a second home over at tldr.nettime.org. Mucho thanks to the people who do all the hosting work to make a comfy home for us here in the mastodon wilds!

So did anybody get any problems with F-Droid not updating and you had to switch it back to 'legacy updating mode' or whatever?
#fdroid #FdroidProblems

I often run into web pages that make me think "I wonder if this is the worst page on the Internet today."
Today's candidate is Bell's outages checker. The javascripty text box thing for the address is a mess, and reloading the results page (you know, a thing people might want to do to get an update on their ISP's current failure) makes you go through the address dance every time.
Maybe avoid piling on the back-breaking straws here, broken ISP…

Undecidability of Translational Tiling of the Plane with Four Tiles
Chao Yang, Zhujun Zhang
https://arxiv.org/abs/2506.19295 https://…

Undecidability of Translational Tiling of the Plane with Four Tiles
The translational tiling problem, dated back to Wang's domino problem in the 1960s, is one of the most representative undecidable problems in the field of discrete geometry and combinatorics. Ollinger initiated the study of the undecidability of translational tiling with a fixed number of tiles in 2009, and proved that translational tiling of the plane with a set of $11$ polyominoes is undecidable. The number of polyominoes needed to obtain undecidability was reduced from $11$ to $7$ by Yang an…

Way back in 2022, as the world tried to readjust back to "normal" following COVID - I helped to co-organise a bootcamp with sponsorhop from the @… IASC, @… and a generous dollop of help from @… and @… colleagues.
We gathered 10 senior scientist mentors and 22 students in an old torpedo research station (now used by Roskilde University) for 10 days. It was an extremely intense period but the 4th paper produced by this talented group has just come out.
I consider facilitating #EarlyCareerScientists to work on important science problems an extremely rewarding part of my job, and I'm looking forward to the next one already as part of our PISCO project.
In the mean time, go and read this extremely cool work, collecting together a huge number of radiosonde observations going back to the 1950s over the Arctic Ocean and using them to assess how well CMIP6 models represent lower atmosphere.
#CMIP6 #ClimateModels #Arctic #ArcticClimate #SeaIce
https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2024JD041412