Tootfinder

mLaSDI: Multi-stage latent space dynamics identification
William Anderson, Kevin Chung, Youngsoo Choi
https://arxiv.org/abs/2506.09207 https://

mLaSDI: Multi-stage latent space dynamics identification
Determining accurate numerical solutions of partial differential equations (PDEs) is an important task in many scientific disciplines. However, solvers can be computationally expensive, leading to the development of reduced-order models (ROMs). Recently, Latent Space Dynamics Identification (LaSDI) was proposed as a data-driven, non-intrusive ROM framework. LaSDI compresses the training data using an autoencoder and learns a system of user-chosen ordinary differential equations (ODEs), which go…

Ukraine: Haben die meisten Drohnen abgeschossen
Nach Angaben der ukrainischen Luftwaffe hat Russland während eines nächtlichen Angriffs 479 Drohnen und 20 Raketen eingesetzt. Zu deren Zielen habe auch ein Flugplatz gehört.
Die Luftwaffe habe 460 Drohnen und 19 Raketen abgeschossen, darunter vier "Kinschal"-Raketen, hieß es in einer Erklärung. Die Luftwaffe fügte hinzu, dass sie an zehn Orten Treffer und an 17 Orten herabfall…
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Ukraine-Liveblog: ++ Ukraine meldet größten russischen Luftangriff ++
Nach Angaben der ukrainischen Luftwaffe hat Russland bei seinem bislang größten Angriff 479 Drohnen eingesetzt. Auch Kiew ist erneut Ziel russischer Angriffe geworden. Die Entwicklungen im Liveblog.

Restoration brings back fresh water, wildlife to degraded pšramos in Ecuador https://news.mongabay.com/2025/08/restoration-brings-back-fresh-water-wildlife-to-degraded-paramos-in-ecuador/

Restoration brings back fresh water, wildlife to degraded páramos in Ecuador
When the sheep were removed, the páramo — high-altitude ecosystems in the Andes — started to heal. Without their waste, water quality improved. Without their hooves compacting the soil, plants began to grow again. Before long, shy white-tailed deer arrived, drawn by the grasses and shrubs for food and shelter. Not long after, pumas reappeared. […]

Realistic shell model for ordinary muon capture of sd-shell nuclei
S. L. Lyu, G. De Gregorio, T. Fukui, N. Itaco, L. Coraggio
https://arxiv.org/abs/2508.06221 https://

Realistic shell model for ordinary muon capture of sd-shell nuclei
We report about a study of the ordinary muon capture in nuclei belonging to the sd shell, an electroweak process that occurs with exchange momenta far larger than ordinary beta decays (approximately 100 MeV). Such a characteristic places this transition in an energy range that is consistent with the neutrinoless double-beta decay, and represents an interesting test for nuclear models to support their predictions of the nuclear matrix elements for such an unobserved process. For the first time, …

It‘s #TuneTuesday, the theme is #NotMyCircusNotMyMonkeys, and my brain went straight to
‘Is it any wonder why princes and kings
Are clowns that caper in their sawdust rings?
Ordinary people that are like you and me?
We're the builders of their destiny’
I …

Restricted graph Lie algebras in even characteristic
Simone Blumer
https://arxiv.org/abs/2507.07627 https://arxiv.org/pdf/2507.07627

Restricted graph Lie algebras in even characteristic
We investigate restricted Lie algebras arising as analogues of (twisted) right-angled Artin groups and right-angled Coxeter groups over fields of characteristic two. These algebras are defined via quadratic relations determined by decorated graphs. We compute their cohomology rings with trivial coefficients and uncover phenomena specific to characteristic two: unlike in zero/odd characteristics, where quadratically defined ordinary and restricted Lie algebras have equivalent cohomology theories…

Isogeny graphs of abelian varieties and singular ideals in orders
Sarah Arpin, Stefano Marseglia, Caleb Springer
https://arxiv.org/abs/2508.03570 https://a…

Isogeny graphs of abelian varieties and singular ideals in orders
Famously, Kohel proved that isogeny graphs of ordinary elliptic curves are beautifully structured objects, now called volcanos. We prove graph structural theorems for abelian varieties of any dimension with commutative endomorphism ring and containing a fixed locally Bass order, leveraging an ideal-theoretic perspective on isogeny graphs. This generalizes previous results, which relied on restrictive additional assumptions, such as maximal real multiplication, ordinary, and absolutely simple (B…

Inelastically Decoupling Dark Matter
Ronny Frumkin, Yonit Hochberg, Eric Kuflik, Binyamin Vilk
https://arxiv.org/abs/2508.04772 https://arxiv.org/pdf/2508.…

Inelastically Decoupling Dark Matter
We present a new dark matter candidate, the `inELastically DEcoupling Relic' (iELDER), which is a cold thermal relic whose abundance is determined by the freeze out of its inelastic scattering off of bath particles in the presence of $3\to2$ self-annihilations. The dark matter is predicted to be light, in the $O(\mathrm{MeV}-\mathrm{GeV})$ range, with significant self-annihilations and very weak inelastic couplings to ordinary matter. We demonstrate iELDER dark matter using a $Z_3$-symmetric to…

ℹ️ Beitrag im Liveblog gelöscht oder nicht zuordenbar, es folgt die alte Version:
Israelisches Militär ordnet neue Evakuierungen in Chan Junis an
Das israelische Militär hat die Räumung weiterer Gebiete im Gazastreifen angeordnet. Es forderte Menschen im Nordwesten der Stadt Chan Junis auf, die Gegend in Richtung Westen zu verlassen, weil in der Stadt Militäreinsätze gegen die militant-islamistische Hamas geplant seien. Die n…
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Ukraine-Liveblog: ++ AKW Saporischschja laut IAEA ohne Strom ++
Das von Russland besetzte Atomkraftwerk Saporischschja hat der Internationalen Atomenergiebehörde (IAEA) zufolge die externe Stromversorgung verloren. US-Präsident Trump will offenbar mit der Ukraine bei der Luftverteidigung zusammenarbeiten.

Normal forms for ordinary differential operators, II
Junhu Guo, A. B. Zheglov
https://arxiv.org/abs/2506.19799 https://arxiv.org/pdf/…

Normal forms for ordinary differential operators, II
In this paper, which is a follow-up of our first paper "Normal forms for ordinary differential operators, I", we extend the explicit parametrisation of torsion free rank one sheaves on projective irreducible curves with vanishing cohomology groups obtained earlier to analogous parametrisation of torsion free sheaves of arbitrary rank with vanishing cohomology groups on projective irreducible curves. As an illustration of our theorem we calculate one explicit example of such parametrisation, n…