Tootfinder

Put up a new batch of public domain image cutouts, this time focusing on transportation:
https://seedling.itch.io/modified-public-domain-art/devlog/1021855/new-images-transportation
These will look better if you're in light mo…

Physically-Motivated Guiding States for Local Hamiltonians
Gabriel Waite, Karl Lin, Samuel J Elman, Michael J Bremner
https://arxiv.org/abs/2509.25815 https://

Physically-Motivated Guiding States for Local Hamiltonians
This work characterises families of guiding states for the Guided Local Hamiltonian problem, revealing new connections between physical constraints and computational complexity. Focusing on states motivated by Quantum Chemistry and Hamiltonian Complexity, we extend prior BQP-hardness results beyond semi-classical subset states. We demonstrate that broader state families preserve hardness, while maintaining classical tractability under practical parameter regimes. Crucially, we provide a constru…

A Characterization of Quasi-Einstein Metrics
Antonio Airton Freitas Filho
https://arxiv.org/abs/2509.25132 https://arxiv.org/pdf/2509.25132

A Characterization of Quasi-Einstein Metrics
We study the modified Ricci solitons as a new class of Einstein type metrics that contains both Ricci solitons and n-quasi-Einstein metrics. This class is closely related to the construction of the Ricci solitons that are realised as warped products. A modified Ricci soliton appears as part of a special solution of the modified Ricci-harmonic flow, which result a new char- acterization of n-quasi-Einstein metrics. We also study the modified Ricci almost solitons. In the spirit of the Lichnerowi…

Structural Nested Mean Models for Modified Treatment Policies
Zach Shahn
https://arxiv.org/abs/2509.22916 https://arxiv.org/pdf/2509.22916

Structural Nested Mean Models for Modified Treatment Policies
There is a growing literature on estimating effects of treatment strategies based on the natural treatment that would have been received in the absence of intervention, often dubbed `modified treatment policies' (MTPs). MTPs are sometimes of interest because they are more realistic than interventions setting exposure to an ideal level for all members of a population. In the general time-varying setting, Richardson and Robins (2013) provided exchangeability conditions for nonparametric identific…

Construction of modified wave operators via wave packet transform
Taisuke Yoneyama
https://arxiv.org/abs/2508.21598 https://arxiv.org/pdf/2508.21598…

Construction of modified wave operators via wave packet transform
In this paper, we construct a modified wave operators for Schrodinger equations with time-dependent long-range potentials by using wave packet transform and give a proof of the existence of the modified wave operators.

A Biologically Motivated Finite Difference Approach for Simulating Singularly Perturbed Vertical Motion in Human Gait
Shubhangini Gupta, Sourav Banerjee, Tamal Pramanick
https://arxiv.org/abs/2508.21410

A Biologically Motivated Finite Difference Approach for Simulating Singularly Perturbed Vertical Motion in Human Gait
In this study, we present a simulation-based numerical method for solving a class of singularly perturbed second-order differential equations that come from a simplified biologically motivated model of human gait. Important physical factors such as gravity, damping, and leg stiffness are included in the model, which also depicts the vertical motion of the center of mass of the body during walking or running. Most of the time, standard numerical methods are ineffective in resolving boundary laye…

Silence from Ukraine's allies after 'politically motivated' arrest of former top energy official: https://benborges.xyz/2025/10/31/silence-from-ukraines-allies-after.html

There's some kind of right wing conspiracy theory involving the beds from, I assume, the movie Elysium (2013)?
https://www.theverge.com/news/787042/trump-posts-then-pulls-bizarre-ai-video-promoting-medbed-conspiracy

Trump posts, then pulls bizarre AI video promoting MedBed conspiracy
Trump shared an AI-generated video in which he announced a MedBed hospital and national MedBed card.

A Cartography of Open Collaboration in Open Source AI: Mapping Practices, Motivations, and Governance in 14 Open Large Language Model Projects
Johan Lin{\aa}ker, Cailean Osborne, Jennifer Ding, Ben Burtenshaw
https://arxiv.org/abs/2509.25397

A Cartography of Open Collaboration in Open Source AI: Mapping Practices, Motivations, and Governance in 14 Open Large Language Model Projects
The proliferation of open large language models (LLMs) is fostering a vibrant ecosystem of research and innovation in artificial intelligence (AI). However, the methods of collaboration used to develop open LLMs both before and after their public release have not yet been comprehensively studied, limiting our understanding of how open LLM projects are initiated, organized, and governed as well as what opportunities there are to foster this ecosystem even further. We address this gap through an …

Generating Differentially Private Networks with a Modified Erd\H{o}s-R\'{e}nyi Model
Huaiyuan Rao, Calvin Hawkins, Alexander Benvenuti, Matthew Hale
https://arxiv.org/abs/2509.25431

Generating Differentially Private Networks with a Modified Erdős-Rényi Model
Differential privacy has been used to privately calculate numerous network properties, but existing approaches often require the development of a new privacy mechanism for each property of interest. Therefore, we present a framework for generating entire networks in a differentially private way. Differential privacy is immune to post-processing, which allows for any network property to be computed and analyzed for a private output network, without weakening its protections. We consider undirect…