Tootfinder

Nominal Sets in Rocq
Fabr\'icio Sanches Paranhos (Nethermind - London, UK), Daniel Ventura (INF-UFG)
https://arxiv.org/abs/2509.25883 https://arxiv.org…

Nominal Sets in Rocq
Nominal techniques have been praised for their ability to formalize grammars with binding structures closer to their informal developments. At its core, there lies the definition of nominal sets, which capture the notion of name (in)dependence through a simple, and uniform, metatheory based on name permutations. We present a formal constructive development of nominal sets in Rocq (formerly known as Coq), with its main design and project decisions. Furthermore, we formalize the concepts of fresh…

OpenAI has already committed to spending $1.4 trillion on infrastructure for AI, Sam Altman said during a livestreamed event on Tuesday, and he expects to continue moving aggressively on that front.
To finance that, OpenAI will need to raise unprecedented amounts of capital through venture funding, debt and an eventual public offering, the last of which Altman said remains the most likely path for the company.
SoftBank, one of OpenAI’s biggest backers, had reserved the right to pu…

VCs say some AI startups, under pressure to show rapid ARR growth, are using questionable accounting practices like counting one-time deals as recurring revenue (Allie Garfinkle/Fortune)
https://fortune.com/2025/09/28/how-is-arr-calculated-startups-venture/

‘There’s so much pressure to be the company that went from zero to $100 million in X days’: Inside the sketchy world of ARR and inflated AI startup accounting
Annual recurring revenue is the metric VCs and founders love to tout. But skeptics think these overblown numbers are helping fuel a bubble.

from my link log —
Fun and weirdness with SSDs and PostgreSQL.
https://vondra.me/posts/fun-and-weirdness-with-ssds/
saved 2025-08-21

Efficient Sketching and Nearest Neighbor Search Algorithms for Sparse Vector Sets
Sebastian Bruch, Franco Maria Nardini, Cosimo Rulli, Rossano Venturini
https://arxiv.org/abs/2509.24815

Efficient Sketching and Nearest Neighbor Search Algorithms for Sparse Vector Sets
Sparse embeddings of data form an attractive class due to their inherent interpretability: Every dimension is tied to a term in some vocabulary, making it easy to visually decipher the latent space. Sparsity, however, poses unique challenges for Approximate Nearest Neighbor Search (ANNS) which finds, from a collection of vectors, the k vectors closest to a query. To encourage research on this underexplored topic, sparse ANNS featured prominently in a BigANN Challenge at NeurIPS 2023, where appr…

Trump maintains control over and can profit from his businesses while in office through a revocable trust, of which he is both the sole donor and sole beneficiary.
In his first term, those looking to support Trump financially could lend him money against his real estate, license his name, buy his assets, join one of his clubs or book a hotel.
Since leaving office in 2021, Trump’s business empire expanded into the digital realm, where the products are often intangible, but the rev…

Truth Social, the $Trump meme coin and World Liberty Financial Give Supporters And Favor Seekers New Ways To Pay Trump
Foreign firms, crypto whales and political allies are using Trump’s newest ventures to route millions into companies he profits from while in office.

Transatlantische Weltraumrivalen https://www.german-foreign-policy.com/news/detail/10179

A quantitative analysis of intraventricular bioimpedance in an in vivo pilot study with contextual pressure measurements
Fabian Fl\"urenbrock, Christian T. Stoeck, Markus F. Oertel, Miriam Weisskopf, Melanie N. Zeilinger, Marianne Schmid Daners, Leonie Korn
https://arxiv.org/abs/2509.23785

A quantitative analysis of intraventricular bioimpedance in an in vivo pilot study with contextual pressure measurements
Hydrocephalus is a neurological condition characterized by disturbed cerebrospinal fluid (CSF) dynamics and is typically treated with shunt systems that drain excessive CSF out of the ventricular system. Continuous monitoring of ventricular CSF volume, however, remains a major unmet need in the clinical management of this condition. While intraventricular bioimpedance (BI) has been proposed as a potential marker of CSF volume, prior investigations have been limited to simulations, in vitro phan…

Trump plans to sign a TikTok deal on Thursday; source: TikTok US would be run by a new joint venture company, with ByteDance holding less than 20% of its stock (NBC News)
https://www.nbcnews.com/politics/donald-trump/trump-tiktok-deal-sale-china-rcna2335…

Trump expected to sign a TikTok deal on Thursday
President Donald Trump on Thursday is expected to sign a deal to facilitate the sale of TikTok from a Chinese-based company to a group of American investors, two senior White House officials told NBC News

Modular, which lets developers build AI apps that run across multiple GPU and CPU vendors, raised $250M led by US Innovative Technology at a $1.6B valuation (Lauren Goode/Wired)
https://www.wired.com/story/semiconductor-software-startups-chips/

A Former Apple Luminary Sets Out to Create the Ultimate GPU Software
Demand for AI chips is booming—and so is the need for software to run them. Chris Lattner’s startup Modular just raised $250 million to build the best developer tools for AI hardware.