Tootfinder

Being autistic, sorry not sorry, I’m obsessed with this font Comic Mono (https://dtinth.github.io/comic-mono-font/) and I totally force it on my site! ♾️✨
Check it out at

Das muss man sich mal geben.
There is no cloud...
Es braucht dringen mehr Unabhängigkeit.
https://www.heise.de/news/Strafgerichtshof-Microsofts-E-Mail-Sperre-als-Weckruf-fuer-digitale-Souveraenita…

Dieser kleine Trupp Löffler fouragiert regelmäßig bei uns unten in dem flachen Tümpel gleich hinter der Wasserlinie. Fotografiert mit dem Pixel 8 durch's Okular unseres Spektivs.
#Naturfoto

This https://arxiv.org/abs/2411.15293 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_qbi…

The Mean-Field Survival Model for Stripe Formation in Zebrafish Exhibits Turing Instability
Zebrafish have been used as a model organism in many areas of biology, including the study of pattern formation. The mean-field survival model is a coupled ODE system describing the expected evolution of chromatophores coordinating to form stripes in zebrafish. This paper presents analysis of the model focusing on parameters for the number of cells, length of distant-neighbor interactions, and rates related to birth and death of chromatophores. We derive the conditions on these parameters for a…

Knowledge Compression via Question Generation: Enhancing Multihop Document Retrieval without Fine-tuning
Anvi Alex Eponon, Moein Shahiki-Tash, Ildar Batyrshin, Christian E. Maldonado-Sifuentes, Grigori Sidorov, Alexander Gelbukh
https://arxiv.org/abs/2506.13778

Knowledge Compression via Question Generation: Enhancing Multihop Document Retrieval without Fine-tuning
This study presents a question-based knowledge encoding approach that improves retrieval-augmented generation (RAG) systems without requiring fine-tuning or traditional chunking. We encode textual content using generated questions that span the lexical and semantic space, creating targeted retrieval cues combined with a custom syntactic reranking method. In single-hop retrieval over 109 scientific papers, our approach achieves a Recall@3 of 0.84, outperforming traditional chunking methods by …

Intersection numbers between horizontal foliations of quadratic differentials
Dragomir Saric, Taro Shima
https://arxiv.org/abs/2506.14943 https://

Intersection numbers between horizontal foliations of quadratic differentials
We establish that the intersection number between the horizontal foliations of any two finite-area holomorphic quadratic differentials on an arbitrary Riemann surface is finite. Our main result shows that the intersection number is jointly continuous in the $L^1$-norm on the quadratic differentials. A corollary is that the Jenkins-Strebel differentials are not dense in the space of all finite-area holomorphic quadratic differentials when the infinite Riemann surface is not parabolic.

Extended Spherical Geometry Algorithm for Spaceborne SAR Processing in Stripmap and TOPS Imaging Modes
Xinhua Mao, Manyi Tao, Jixia Fan
https://arxiv.org/abs/2506.08620

Extended Spherical Geometry Algorithm for Spaceborne SAR Processing in Stripmap and TOPS Imaging Modes
The Spherical Geometry Algorithm (SGA) demonstrates superior capability in achieving efficient and precise spaceborne SAR image formation processing, even under challenging imaging conditions including non-linear radar trajectories and spherical Earth surface geometry. Nevertheless, the original SGA is specifically developed for spotlight SAR data processing and can't directly applied to processing spaceborne SAR data in other modes. In this paper, we first analyze the limitations of the SGA al…

AstroSat/UVIT Study of NGC 663: first detection of Be sdOB systems in a young star cluster
Sneha Nedhath, Sharmila Rani, Annapurni Subramaniam, Elena Pancino
https://arxiv.org/abs/2506.08126

AstroSat/UVIT Study of NGC 663: first detection of Be+sdOB systems in a young star cluster
Context. Be stars are rapidly rotating stars surrounded by a disc; however, the origin of these remains unclear. Mass and angular momentum transfer in close binaries account for the rapid rotation of a major fraction of Be stars, supported by the previous detection of low-mass stripped companions to them. The stripped companions can be helium burning subdwarf OB-type stars (sdOBs), and white dwarfs (WDs). Aims. The main objective of this study is to characterise the identified Be stars in the y…

SDP bounds on the stability number via ADMM and intermediate levels of the Lasserre hierarchy
Lennart Sinjorgo, Renata Sotirov, Juan C. Vera
https://arxiv.org/abs/2506.08648

SDP bounds on the stability number via ADMM and intermediate levels of the Lasserre hierarchy
We consider the Lasserre hierarchy for computing bounds on the stability number of graphs. The semidefinite programs (SDPs) arising from this hierarchy involve large matrix variables and many linear constraints, which makes them difficult to solve using interior-point methods. We propose solving these SDPs using the alternating direction method of multipliers (ADMM). When the second level of the Lasserre hierarchy for a given graph is intractable for the ADMM, we consider an intermediate-level …

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