Tootfinder

Antidirected paths in oriented graphs
Andrzej Grzesik, Marek Skrzypczyk
https://arxiv.org/abs/2506.11866 https://arxiv.org/pdf/2506.1…

Antidirected paths in oriented graphs
We show that for any integer $k \ge 4$, every oriented graph with minimum semidegree bigger than $\frac{1}{2}(k-1+\sqrt{k-3})$ contains an antidirected path of length $k$. Consequently, every oriented graph on $n$ vertices with more than $(k-1+\sqrt{k-3})n$ edges contains an antidirected path of length $k$. This asymptotically proves the antidirected path version of a conjecture of Stein and of a conjecture of Addario-Berry, Havet, Linhares Sales, Reed and Thomassé, respectively.

Galaxies at the edges: a complete census of MACS J0416.1-2403 cluster
Rossella Ragusa, Maurizio D'Addona, Amata Mercurio, Marcella Longhetti, Marisa Girardi, Marianna Annunziatella, Nicolas Estrada, Claudio Grillo, Angela Iovino, Giula Rodighiero, Piero Rosati, Benedetta Vulcani, Giuseppe Angora, Hans Bohringer, Massimo Brescia, Gabriel Bartosch Caminha, Gayoung Chon, Fedor Getman, Aniello Grado, Marco Gullieuszik, Luca Limatola, Alessia Moretti, Luisa Pecoraro

Galaxies at the edges: a complete census of MACS J0416.1-2403 cluster
Numerous studies have established that the environment influences the physical properties of a galaxy. While gas inflows supply the fuel for SF, high density and temperature conditions suppress SF activity through various quenching processes. Investigations into large scale structures, such as filaments and overdense regions in the cluster outskirts, have focused on the low z. To move to intermediate z and explore galaxy pathways combined with environmental effects, it is crucial to join wide f…

Poro-viscoelastic tidal heating of Io
Hamish C. F. C. Hay, Ian Hewitt, Marc Rovira-Navarro, Richard F. Katz
https://arxiv.org/abs/2507.11266 https://

Poro-viscoelastic tidal heating of Io
Io's tidally-driven global volcanism indicates widespread partial melting in its mantle. How this melt participates in the interior dynamics, and, in particular, the role it plays in tidal dissipation, is poorly understood. We model Io's tidal deformation by treating its mantle as a two-phase (solid and melt) system. By combining poro-viscous and poro-elastic compaction theories in a Maxwell framework with a consistent model of tidal and self-gravitation, we produce the first self-consistent ev…

Accessibility Barriers in Multi-Terabyte Public Datasets: The Gap Between Promise and Practice
Marc Bara
https://arxiv.org/abs/2506.13256 https://

Accessibility Barriers in Multi-Terabyte Public Datasets: The Gap Between Promise and Practice
The promise of "free and open" multi-terabyte datasets often collides with harsh realities. While these datasets may be technically accessible, practical barriers -- from processing complexity to hidden costs -- create a system that primarily serves well-funded institutions. This study examines accessibility challenges across web crawls, satellite imagery, scientific data, and collaborative projects, revealing a consistent two-tier system where theoretical openness masks practical exclusivity. …

"While the official cause of death was suicide by hanging, Mark Epstein told Acosta that the pathologist he selected to be present at his brother's autopsy said the injuries were more consistent with homicide than suicide."
'Covering things up': Epstein's brother says Trump admin being 'secretive' about his death - Alternet.org
https://www.alternet.org/epstein-brother-trump/

JWST lens model for A370: A very low dark matter fraction for a brightest cluster galaxy and lensing properties for the Dragon arc
Jose M. Diego, Fengwu Sun, Jose M. Palencia, Xiaojing Lin, Marceau Limousin, Rachel Gledhill, Anna Niemiec, Wenlei Chen, Rogier A. Windhorst, Mitchell F. Strubble, Tom Broadhurst
https://arxiv.org/ab…

JWST lens model for A370: A very low dark matter fraction for a brightest cluster galaxy and lensing properties for the Dragon arc
We present a new lens model for the $z=0.375$ galaxy cluster Abell 370 based on previously spectroscopically confirmed lensed galaxies and new lensed systems identified in JWST data, including recent data from the MAGNIF program. Based on the best models able to reproduce two radial arcs near the BCGs, we compare the stellar mass to the total mass from the lens model and find that the fraction of dark matter in the south BCG is consistent with $Λ$CDM while in the north BCG we find a very small…

6 ways AI can partner with us in creative inquiry, inspired by media theorist Marshall McLuhan https://theconversation.com/6-ways-ai-can-partner-with-us-in-creative-inquiry-inspired-by-media-theorist-marsha…

6 ways AI can partner with us in creative inquiry, inspired by media theorist Marshall McLuhan
By engaging consciously with technology, students learn to use AI critically and creatively — without surrendering their agency.

Scrutinizing the cosmogenic origin of the KM3-230213A event: A Multimessenger Perspective
Alessandro Cermenati, Antonio Ambrosone, Roberto Aloisio, Denise Boncioli, Carmelo Evoli
https://arxiv.org/abs/2507.11993

Scrutinizing the cosmogenic origin of the KM3-230213A event: A Multimessenger Perspective
The recent detection of the neutrino event KM3-230213A ($\sim$~220 PeV) by the KM3NeT/ARCA telescope, the most energetic ever observed, could represent the long-awaited evidence for a cosmogenic origin, arising from the interaction of an ultra-high-energy cosmic ray with background photons. Its secure confirmation would mark a major advance in high-energy astrophysics. We perform a self-consistent multimessenger transport calculation of protons and their secondary $γ$-rays and neutrinos from c…

For Raiders' Owner Mark Davis, Only Results Matter https://www.si.com/nfl/raiders/mark-davis-john-spytek-las-vegas-pete-carroll-tom-brady

Bias Delayed is Bias Denied? Assessing the Effect of Reporting Delays on Disparity Assessments
Jennah Gosciak (Cornell University), Aparna Balagopalan (Massachusetts Institute of Technology), Derek Ouyang (Stanford University), Allison Koenecke (Cornell University), Marzyeh Ghassemi (Massachusetts Institute of Technology), Daniel E. Ho (Stanford University)

Bias Delayed is Bias Denied? Assessing the Effect of Reporting Delays on Disparity Assessments
Conducting disparity assessments at regular time intervals is critical for surfacing potential biases in decision-making and improving outcomes across demographic groups. Because disparity assessments fundamentally depend on the availability of demographic information, their efficacy is limited by the availability and consistency of available demographic identifiers. While prior work has considered the impact of missing data on fairness, little attention has been paid to the role of delayed dem…