Tootfinder

Noch einmal zu Hashtags.
Nach 2,5 Jahren Masto hat sich mein Hashtagverhalten tatsächlich verändert. Ich nutze immer weniger davon. Weil mir immer wieder getaggte Beiträge von Unbekannten in die Timeline flattern, die mich null interessieren.
Also … angenommen, ich lese etwas aus dem Bereich Biologie, was ich für unglaublich interessant und teilenswert halte: Früher hätte ich sicher den Hashtag „Biologie“ genutzt. 1/2

On the geometry of synthetic null hypersurfaces
Fabio Cavalletti, Davide Manini, Andrea Mondino
https://arxiv.org/abs/2506.04934 https://

On the geometry of synthetic null hypersurfaces
This paper develops a synthetic framework for the geometric and analytic study of null (lightlike) hypersurfaces in non-smooth spacetimes. Drawing from optimal transport and recent advances in Lorentzian geometry and causality theory, we define a synthetic null hypersurface as a triple $(H, G, \mathfrak{m})$: $H$ is a closed achronal set in a topological causal space, $G$ is a gauge function encoding affine parametrizations along null generators, and $\mathfrak{m}$ is a Radon measure serving as…

Double neutral-current corrections to NLO electroweak leptonic cross sections
Stefano Frixione, Fabio Maltoni, Davide Pagani, Marco Zaro
https://arxiv.org/abs/2506.10732

Double neutral-current corrections to NLO electroweak leptonic cross sections
We present a method for improving next-to-leading order electroweak (EW) predictions for lepton-scattering processes by consistently including double neutral-current corrections arising from vector-boson-fusion topologies, which are formally of higher order. By combining, in a process-independent manner, exact fixed-order results, collinear resummation of QED radiation, and a subtraction procedure, we obtain results which are gauge invariant and valid in the entire phase space, retain any depen…

Zug fahren in NRW sein wie

This https://arxiv.org/abs/2505.05432 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_hept…

Boundary Energy-Momentum Tensors for Asymptotically Flat Spacetimes
We consider 3D and 4D asymptotically flat spacetimes near future null infinity endowed with the most general allowed Carroll geometry. We define a boundary energy-momentum tensor by varying the on-shell action with respect to the Carroll metric data. This requires adding counterterms to the Einstein-Hilbert action. We show that, in 4D, the shear is on par with the Carroll metric data. Their combined response defines a boundary energy-momentum-news complex whose diffeomorphism Ward identity is e…

Modeling temporal hypergraphs
J\"urgen Lerner, Marian-Gabriel H\^ancean, Matjaz Perc
https://arxiv.org/abs/2506.01408 https://ar…

Modeling temporal hypergraphs
Networks representing social, biological, technological or other systems are often characterized by higher-order interaction involving any number of nodes. Temporal hypergraphs are given by ordered sequences of hyperedges representing sets of nodes interacting at given points in time. In this paper we discuss how a recently proposed model family for time-stamped hyperedges - relational hyperevent models (RHEM) - can be employed to define tailored null distributions for temporal hypergraphs. RHE…

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