Tootfinder

I wished I could disagree with this post but sadly I cannot. I had high hopes for Matrix and still use it but boy is it not fixing the core and conceptual issues.
https://shkspr.mobi/blog/2025/07/im-never-going-back-to-matrix/

I'm never going back to Matrix
I should love Matrix. It is a decentralised, privacy preserving, multi-platform chat tool. Goodbye Slack and your ridiculous free limits. Adiós Discord and your weird gamification. Suck it IRC with your obscure syntax and faint stench of BO. WhatsApp and Telegram can stick their heads in a bucket of lukewarm sick and sing sea shanties! Let's join the future! The problem is - Matrix is shit. Not …

A look at the rise of $5B unicorns, which make up 13% of ~1,600 unicorns but hold $3.5T of $6T total valuation; 17 startups joined the $5B club in H1 2025 (Gené Teare/Crunchbase News)
https://news.crunchbase.com/venture/ultra-unicorn-startups…

The Rise Of The Ultra-Unicorns: $5B+ Startups Are Leading The Private-Market Herd In 2025
Of the nearly 1,600 companies on The Crunchbase Unicorn Board, a small but ultra-elite club of private companies valued at $5 billion or more is growing across multiple metrics, an analysis of the data shows. We take a look at them, their valuations and which sectors — and countries — rank the highest.

Multiple former and current government personnel shared with this magazine photos of a highly visible, apparently hand-written “FUCK RFK” sign that sources say appeared recently on the CDC Roybal building.
Matters only degenerated from there.
As this work week came to a close, former and current CDC staff assured Rolling Stone that
internal rank-and-file animus toward the president, Kennedy, and their allies in the federal government has only intensified in recent days.

Team Trump Probes Dissent at CDC as ‘F-CK RFK’ Sign Goes Up at Agency
The Trump administration is investigating dissent at the CDC after the appearance of an "obscene" placard and some "vandalism" at the agency.

Interesting numbers about US top websites.
https://pressgazette.co.uk/media-audience-and-business-data/media_metrics/most-popular-websites-news-us-monthly-3/

Top 50 news websites in the US: AP shrugs off Trump row with huge traffic boost
Press Gazette lists the top 50 biggest websites for news in the US. Monthly updated top 50 listing based on data from Similarweb.

Stacked SVD or SVD stacked? A Random Matrix Theory perspective on data integration
Tavor Z. Baharav, Phillip B. Nicol, Rafael A. Irizarry, Rong Ma
https://arxiv.org/abs/2507.22170

Stacked SVD or SVD stacked? A Random Matrix Theory perspective on data integration
Modern data analysis increasingly requires identifying shared latent structure across multiple high-dimensional datasets. A commonly used model assumes that the data matrices are noisy observations of low-rank matrices with a shared singular subspace. In this case, two primary methods have emerged for estimating this shared structure, which vary in how they integrate information across datasets. The first approach, termed Stack-SVD, concatenates all the datasets, and then performs a singular va…

Paxton Loses Appeal In Musk/Media Matters Lawsuit - Joe.My.God.
https://www.joemygod.com/2025/05/paxton-loses-appeal-in-musk-media-matters-lawsuit/

Sustainability Evaluation Metrics for Recommender Systems
Alexander Felfernig, Damian Garber, Viet-Man Le, Sebastian Lubos, Thi Ngoc Trang Tran
https://arxiv.org/abs/2507.22520 …

Sustainability Evaluation Metrics for Recommender Systems
Sustainability-oriented evaluation metrics can help to assess the quality of recommender systems beyond wide-spread metrics such as accuracy, precision, recall, and satisfaction. Following the United Nations`s sustainable development goals (SDGs), such metrics can help to analyse the impact of recommender systems on environmental, social, and economic aspects. We discuss different basic sustainability evaluation metrics for recommender systems and analyze their applications.

Matrix product states as thin torus limits of conformal correlators
Adri\'an Franco-Rubio, J. Ignacio Cirac, Germ\'an Sierra
https://arxiv.org/abs/2507.22735 https://

Matrix product states as thin torus limits of conformal correlators
We introduce one-parameter families of spin chain ansatz wavefunctions constructed from chiral conformal field theory correlators on a torus, with the modular parameter $τ$ serving as the deformation parameter. In the cylinder limit $τ\to\infty$, these wavefunctions reduce to infinite dimensional matrix product states. In contrast, in the thin torus limit $τ\to0$, they become finite bond dimension matrix product states (MPS). Focusing on families derived from the SU(2)$_1$ and SU(2)$_2$ Wess…

Why Emergence of Gravity in Matrix Theories is Entropic
Vatche Sahakian
https://arxiv.org/abs/2507.21996 https://arxiv.org/pdf/2507.21996

Why Emergence of Gravity in Matrix Theories is Entropic
Matrix theories exhibit the phenomenon of spacetime emergence in certain regimes of their dynamics. In this work, I posit that the key to this emergence is a hierarchy between two timescales -- very slow modes that an observer measures plus a chaotic cloud of very fast modes; this then leads to a natural operator algebra for measurements for the slow modes and an associated density matrix for the full system. I show that this density matrix implies the same gravitational potential energy that h…

Out & about in the Bernina Range, on our way to the Labyrinth, surrounded by majestic 4000ers (meters)... A dream! 😍
(#ThrowbackThursday, preemptive #FootpathFriday and my personal hiking highlight of 2024)