Tootfinder

Der #Zilpzalp ist leicht an seinem „zilp-zalp“-Ruf zu erkennen. Witzig und praktisch für Anfänger in der #Vogelbeobachtung. Dieser unscheinbare #Vogel, dessen Gefieder grünlich-grau getönt ist, …

Zilpzalp (Phylloscopus collybita): Ein kleiner Vogel mit großem Gesang
Vogelstimmen erkennen und bestimmen: Der Zilpzalp

Rank Two Sheaves With Low Discriminant on the Fano Threefold of Index 2 and Degree 5
Danil A. Vassiliev
https://arxiv.org/abs/2510.10608 https://arxiv.org/…

Rank Two Sheaves With Low Discriminant on the Fano Threefold of Index 2 and Degree 5
We describe rank 2 Gieseker semistable sheaves $E$ on the Fano threefold $X_5$ of index 2 and degree 5 with maximal third Chern class $c_3(E)$ for all possible low values of discriminant $\overlineΔ_H(E)\le 40$. The work uses the theory of tilt-stability and Bridgeland stability conditions on smooth projective threefolds. We also make a conjecture about the rank 2 sheaves on $X_5$ with maximal $c_3$ and discriminant big enough.

Multiscale Graph Reduction for Heterogeneous and Anisotropic Discrete Diffusion Processes
Maria Vasilyeva, James Brannick, Ben S. Southworth
https://arxiv.org/abs/2510.10894 htt…

Multiscale Graph Reduction for Heterogeneous and Anisotropic Discrete Diffusion Processes
We present multiscale graph-based reduction algorithms for upscaling heterogeneous and anisotropic diffusion problems. The proposed coarsening approaches begin by constructing a partitioning of the computational domain into a set of balanced local subdomains, resulting in a standard type of domain decomposition. Given this initial decomposition, general coarsening techniques based on spectral clustering are applied within each subgraph in order to accurately identify the key microscopic feature…

VehiclePassport: A GAIA-X-Aligned, Blockchain-Anchored Privacy-Preserving, Zero-Knowledge Digital Passport for Smart Vehicles
Pradyumna Kaushal
https://arxiv.org/abs/2509.06133 …

VehiclePassport: A GAIA-X-Aligned, Blockchain-Anchored Privacy-Preserving, Zero-Knowledge Digital Passport for Smart Vehicles
Modern vehicles accumulate fragmented lifecycle records across OEMs, owners, and service centers that are difficult to verify and prone to fraud. We propose VehiclePassport, a GAIA-X-aligned digital passport anchored on blockchain with zero-knowledge proofs (ZKPs) for privacy-preserving verification. VehiclePassport immutably commits to manufacturing, telemetry, and service events while enabling selective disclosure via short-lived JWTs and Groth16 proofs. Our open-source reference stack anchor…

🇺🇦 #NowPlaying on BBCRadio3's #EssentialClassics
Pyotr Ilyich Tchaikovsky, Royal Liverpool Philharmonic Orchestra & Vasily Petrenko:
🎵 Manfred Symphony, Op 58 (4th mvt)
#PyotrIlyichTchaikovsky #VasilyPetrenko #newRelease 🆕 album
https://open.spotify.com/track/78mHt8Z5pcMbhO0DrUUoO7

Catalan structures arising from pattern-avoiding Stoimenow matchings and other Fishburn objects
Shuzhen Lv, Sergey Kitaev, Philip B. Zhang
https://arxiv.org/abs/2509.09115 https…

Catalan structures arising from pattern-avoiding Stoimenow matchings and other Fishburn objects
In connection with Vassiliev's knot invariants, Stoimenow introduced in 1998 a class of matchings, also known as regular linearized chord diagrams. These matchings are linked to various combinatorial structures, all of which are associated with the Fishburn numbers. In this paper, we address a problem posed by Bevan et~al.\ concerning the identification of subsets of Stoimenow matchings that are counted by the Catalan numbers. We present five solutions in terms of pattern-avoiding matchings. We…

Groß, größer, Schwedens Solarpark! 🌱 ☀️☀️☀️
Der größte Solarpark des Landes ist jetzt mit voller Leistung am Netz - ein beeindruckendes Projekt, das zeigt, wie Flughafenflächen sinnvoll für die Energiewende genutzt werden können.
Zum Artikel: https://hei…

🎶 Ursprünglich kommen Stare aus Europa, doch mittlerweile sind sie weltweit verbreitet. Wusstet Ihr, dass Stare sogar Handy-Klingeltöne imitieren können? Trotz ihrer Häufigkeit sind sie in einigen Gebieten rückläufig. Mehr zu diesem Thema unter dem Link. 🌍🔍
#Vogelbeobachtung #Wildlife

Star (Sturnus vulgaris) - Geselliger Nachahmer mit beeindruckendem Gesang
Der Star: Ein anpassungsfähiger Vogel mit beeindruckendem Gesang und Fähigkeiten. Erfahre mehr über seinen Lebensraum, seine Ernährung und Brut.

VisualOverload: Probing Visual Understanding of VLMs in Really Dense Scenes
Paul Gavrikov, Wei Lin, M. Jehanzeb Mirza, Soumya Jahagirdar, Muhammad Huzaifa, Sivan Doveh, Serena Yeung-Levy, James Glass, Hilde Kuehne
https://arxiv.org/abs/2509.25339

VisualOverload: Probing Visual Understanding of VLMs in Really Dense Scenes
Is basic visual understanding really solved in state-of-the-art VLMs? We present VisualOverload, a slightly different visual question answering (VQA) benchmark comprising 2,720 question-answer pairs, with privately held ground-truth responses. Unlike prior VQA datasets that typically focus on near global image understanding, VisualOverload challenges models to perform simple, knowledge-free vision tasks in densely populated (or, overloaded) scenes. Our dataset consists of high-resolution scans …

Characterization of the near-null error components utilized in composite adaptive AMG solvers
Austen J. Nelson, Panayot S. Vassilevski
https://arxiv.org/abs/2509.09023 https://

Characterization of the near-null error components utilized in composite adaptive AMG solvers
We provide a theoretical justification for the construction of adaptive composite solvers based on a sequence of AMG (algebraic multigrid) $μ$-cycle methods that exploit error components that the current solver cannot damp efficiently. Each solver component is an aggregation based AMG where its aggregates are constructed using the popular in graph community detection modularity matrix. The latter utilizes the given matrix and the error component vector the current solver cannot handle. The per…