Tootfinder

Had a great time presenting our paper “Domain-specific tensor languages” today at #ICFP2025 in Singapore 🇸🇬
The images attached are screenshots from the paper as teasers — diagrams for derivative rules, the Riemann curvature 4-tensor in Einstein’s index notation, and the same in diagram form.
📄 Slides:

Mira Murati's Thinking Machines Lab makes Tinker, its API for fine-tuning language models, generally available, adds support for Kimi K2 Thinking, and more (Thinking Machines Lab)
https://thinkingmachines.ai/blog/tinker-general-availability/

Tinker: General Availability and Vision Input
Today we are announcing four updates to Tinker: No more waitlist New reasoning model: Kimi K2 Thinking New inference interface that is compatible with the OpenAI API Vision input support with Qwen3-VL General availability The waitlist is over! Everybody can use Tinker now; sign up here to get started. See the Tinker homepage for available models and pricing, and check out the Tinker cookbook for code examples. More reasoning with Kimi K2 Thinking Users can now fine-tune Kimi K2 Thinking on Ti…

Completely Positive Biquadratic Tensors
Liqun Qi, Chunfeng Cui, Haibin Chen, Yi Xu
https://arxiv.org/abs/2510.10972 https://arxiv.org/pdf/2510.10972…

Completely Positive Biquadratic Tensors
In this paper, we systemically introduce completely positive biquadratic (CPB) tensors and copositive biquadratic tensors. We show that all weakly CPB tensors are sum of squares tensors, the CPB tensor cone and the copositive biquadratic tensor cone are dual cone to each other. We also show that the outer product of two completely positive matrices is a CPB tensor, and the outer product of two copositive matrices is a copositive biquadratic tensor. We then study two easily checkable subclasses …

Instagrams Teen-Konten bekommen ein filmreifes Update
Social Media für Jugendliche: Teenager bekommen bei Instagram künftig nur noch das zu sehen, was in etwa FSK 12 bei Filmen entspricht.
https://www.

U.S. unseals warrant behind oil tanker seizure near Venezuela (Lauren Floyd/Axios)
https://www.axios.com/2025/12/13/venezuela-oil-tanker-seizure-warrant
http://www.memeorandum.com/251213/p29#a251213p29

Tensor-based compression of the sea temperature data
Ilya Kosolapov, Tatiana Sheloput, Sergey Matveev
https://arxiv.org/abs/2510.09778 https://arxiv.org/pd…

Tensor-based compression of the sea temperature data
In this work we investigate efficient data compression for spatiotemporal Black, Azov and Marmara Seas temperature tensors that contain significant number of missing values. These tensors have a complex structure influenced by the coastlines and bathymetry, as well as temporal temperature changes. While such missing data typically provokes utilization of tensor completion algorithms, we demonstrate that standard SVD-based compression approaches (including the Tucker, Tensor-Train (TT) and Quant…

A continued fraction approximation for the effective elasticity tensor of two-dimensional polycrystals as a function of the crystal elasticity tensor
Graeme W. Milton
https://arxiv.org/abs/2510.10297

A continued fraction approximation for the effective elasticity tensor of two-dimensional polycrystals as a function of the crystal elasticity tensor
For two-dimensional polycrystals the effective elasticity tensor $C_*$ as a function $C_*(C_0)$ of the elasticity tensor $C_0$ of the constituent crystal is considered. It is shown that this function can be approximated by one with a continued fraction expansion resembling that associated with a class of microstructure known as sequential laminates. These are hierarchical microstructures defined inductively. Rank 0 sequential laminates are simply rotations of the pure crystal. Rank $j$ sequenti…

A novel imaging solution, called
"prostate-specific membrane antigen (PSMA) positron emission tomography (PET) scanning",
can more effectively detect the recurrence of prostate cancer
compared to standard imaging methods,
and is associated with improved survival outcomes.

New imaging technique boosts survival in prostate cancer patients
A multicenter study led by London Health Sciences Centre Research Institute (LHSCRI), Lawson Research Institute of St. Joseph's Health Care London (Lawson), and University Health Network (UHN) has found a novel imaging solution, called prostate-specific membrane antigen (PSMA) positron emission tomography (PET) scanning, can more effectively detect the recurrence of prostate cancer compared to standard imaging methods, and is associated with improved survival outcomes.

Venezuela Oil Tanker Seized by U.S. Was Part of Effort to Finance Cuba (New York Times)
https://www.nytimes.com/2025/12/12/world/americas/venezuela-cuba-oil-tanker.html
http://www.memeorandum.com/251213/p41#a251213p41

Cuba denounces US seizure of oil tanker off Venezuela's coast as 'piracy' (Edward Helmore/The Guardian)
https://www.theguardian.com/us-news/2025/dec/13/cuba-denounces-us-seizure-oil-tanker-off-venezuela-coast
http://www.memeorandum.com/251213/p44#a251213p44