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Les « Dernières Nouvelles d’Alsace » condamnées pour le suicide d’un salarié : « L’accident du travail est dû Š une faute inexcusable »
https://www.lemonde.fr/societe/article/202

Suicide d’un salarié : les « Dernières Nouvelles d’Alsace » condamnées ; une « faute inexcusable » reconnue
Le tribunal judiciaire de Strasbourg a condamné les « DNA » à verser 30 000 euros à la famille d’un salarié du journal, qui s’est suicidé en 2019 sur fond de restructuration et de suppressions de postes.

Multiplier algebras and local units
Alfons Van Daele, Joost Vercruysse
https://arxiv.org/abs/2507.08769 https://arxiv.org/pdf/2507.08…

Multiplier algebras and local units
Let $A$ be an algebra over any field. We do not assume that $A$ has an identity. The \emph{multiplier algebra} $M(A)$ is a unital algebra associated to $A$. If we require the product in $A$ to be non-degenerate (as a bilinear form), the multiplier algebra can be characterized as the largest algebra containing $A$ as an essential ideal. We recall the basic definitions and provide some more information about this notion. We endow the multiplier algebra $M(A)$ with the {\it strict topology}. The…

Some remarks on $M_d$-multipliers and approximation properties
Ignacio Vergara
https://arxiv.org/abs/2509.07861 https://arxiv.org/pdf/2509.07861

Some remarks on $M_d$-multipliers and approximation properties
We prove an extension property for $M_d$-multipliers from a subgroup to the ambient group, showing that $M_{d+1}(G)$ is strictly contained in $M_d(G)$ whenever $G$ contains a free subgroup. Another consequence of this result is the stability of the $M_d$-approximation property under group extensions. We also show that Baumslag-Solitar groups are $M_d$-weakly amenable with $\boldsymbolΛ(\operatorname{BS}(m,n),d)=1$ for all $d\geq 2$. Finally, we show that, for simple Lie groups with finite cent…

From Tensor Algebras to Hyperbolic Kac-Moody Algebras
Axel Kleinschmidt, Hannes Malcha, Hermann Nicolai
https://arxiv.org/abs/2508.03815 https://arxiv.org/…

From Tensor Algebras to Hyperbolic Kac-Moody Algebras
We propose a novel approach to study hyperbolic Kac-Moody algebras, and more specifically, the Feingold-Frenkel algebra $\mathfrak{F}$, which is based on considering the tensor algebra of level-one states before descending to the Lie algebra by converting tensor products into multiple commutators. This method enables us to exploit the presence of mutually commuting coset Virasoro algebras, whose number grows without bound with increasing affine level. We present the complete decomposition of th…

Investigation of Air Fluidization during Intruder Penetration in Sand
Bowen Wang, Yuxing Peng, Alvaro Vergara, Jordan H. Boyle, Raul Fuentes
https://arxiv.org/abs/2508.03350 htt…

Investigation of Air Fluidization during Intruder Penetration in Sand
Self-burrowing robots navigating through granular media benefit from airflow-assisted burrowing, which reduces penetration resistance. However, the mechanisms underlying airflow-granular interactions remain poorly understood. To address this knowledge gap, we employ a coupled computational fluid dynamics and discrete element method (CFD-DEM) approach, supplemented by experimental cone penetration tests (CPT) under varying airflow conditions, to investigate the effects of aeration on penetration…

Further aspects of Supersymmetric Virasoro Minimal Strings
Clifford V. Johnson
https://arxiv.org/abs/2506.19000 https://arxiv.org/pdf…

Further aspects of Supersymmetric Virasoro Minimal Strings
A supersymmetric version of the Virasoro minimal string was defined some time ago using random matrix model techniques. Several of the special properties of the matrix model that were noted (accessible fully non-perturbatively) underlie features shared by both 0A and 0B versions of the theory. This paper develops the formalism much further, including showing how the 0A and 0B choices familiar in continuum approaches have a direct analogue in terms of building solutions of the appropriate string…

Conformal Turaev-Viro Theory
Thomas Hartman
https://arxiv.org/abs/2507.11652 https://arxiv.org/pdf/2507.11652

Conformal Turaev-Viro Theory
We define and study Conformal Turaev-Viro (CTV) theory, a dual formulation of Virasoro TQFT based on triangulating 3-manifolds with tetrahedra. Edges of the triangulation are labeled by continuous conformal weights, and tetrahedra are glued together weighted by the Cardy density of states. We demonstrate that the CTV partition function is equal to the modular S-transform of the Virasoro TQFT amplitude-squared, $|Z_{Vir}|^2$. This is analogous to a known result for discrete spin networ…

On bosonic vertex algebras associated with 3D reductions of Argyres-Douglas theories
Takahiro Nishinaka, Hikaru Sasaki
https://arxiv.org/abs/2508.15315 https://

On bosonic vertex algebras associated with 3D reductions of Argyres-Douglas theories
We study the bosonic VOA associated with the 3D $\mathcal{N}=4$ abelian linear quiver gauge theories arising from compactifying 4D $\mathcal{N}=2$ Argyres-Douglas theories of $(A_1,A_{2n-1})$ and $(A_1,D_{2n})$ types. These VOAs are obtained by cancelling the gauge anomaly of the H-twisted 3D theory on the half-space by Heisenberg algebras on the boundary. We particularly conjecture a complete set of strong generators of these bosonic VOAs, which contains more than the Virasoro stress tensor an…

A universal W-algebra for N=4 super Yang-Mills
Federico Bonetti, Carlo Meneghelli
https://arxiv.org/abs/2506.15678 https://arxiv.org/…

A universal W-algebra for N=4 super Yang-Mills
Using bootstrap methods, we provide evidence for the existence of a non-linear W-algebra, denoted $W_\infty^\text{s,s}$, which contains the small N= 4 super Virasoro algebra and features an infinite tower of additional generators, organized in short supersymmetry multiplets. The algebra $W_\infty^\text{s,s}$ has one free parameter, its central charge c. We claim that the simple quotient of $W_\infty^\text{s,s}$ for c= -3(N^2-1) is isomorphic to the vertex operator algebra associated to 4d N=4 $…