Finitary conditions for graph products of monoids

This paper investigates how various finitary conditions, such as weakly left noetherian and weakly left coherent properties, interact with graph products of monoids, establishing that these properties are preserved under retracts and proving that while the converse holds for most conditions, the weakly left noetherian property requires a precise characterization of the constituent monoids and their graph structure.

Dandan Yang, Victoria GouldTue, 10 Ma🔢 math

On sporadic symmetry breaking operators for principal series representations of the de Sitter and Lorentz groups

This paper constructs and classifies all differential symmetry breaking operators between principal series representations of the de Sitter and Lorentz groups SO0(4,1)SO0(3,1)SO_0(4,1) \supset SO_0(3,1), proving that all such operators are necessarily differential and constitute "sporadic" cases that cannot be derived from meromorphic families via residue formulas.

Víctor Pérez-ValdésTue, 10 Ma🔢 math

Totally acyclicity and homological invariants over arbitrary rings

This paper investigates equivalent characterizations of totally acyclicity for acyclic complexes of projective, injective, and flat modules over arbitrary rings, linking these conditions to homological invariants like silp(R), spli(R), and sfli(R) while refining existing results on the equality of these invariants and extending characterizations of Iwanaga-Gorenstein rings and the Nakayama conjecture to the non-commutative setting.

Jian Wang, Yunxia Li, Jiangsheng Hu, Haiyan zhuTue, 10 Ma🔢 math

Orders of commutators and Products of conjugacy classes in finite groups

This paper establishes that a commutator [x,g][x,g] is a pp-element for all gGg \in G if and only if xx is central modulo Op(G)\mathbf{O}_p(G), a result that generalizes the Baer--Suzuki and Glauberman Zp\mathbf{Z}_p^*-theorems and is applied to prove that a conjugacy class KK satisfying K1K=1DD1K^{-1}K = 1 \cup D \cup D^{-1} generates a solvable subgroup.

Hung P. Tong-VietTue, 10 Ma🔢 math

Structure-preserving nodal DG method for Euler equations with gravity II: general equilibrium states

This paper presents a novel entropy-stable nodal discontinuous Galerkin scheme for the Euler equations with gravity that achieves well-balancing for general hydrostatic and moving equilibrium states through a linear entropy correction to the source term, while maintaining compatibility with positivity-preserving limiters and demonstrating robustness in numerical experiments.

Yuchang Liu, Wei Guo, Yan Jiang, Mengping ZhangTue, 10 Ma🔢 math

Renormalisation of Singular SPDEs with Correlated Coefficients

This paper establishes the local well-posedness of the generalized parabolic Anderson model and the ϕ2K+1\phi^{K+1}_2-equation on the two-dimensional torus with random, noise-correlated coefficients by proving that naive renormalisation fails due to variance blow-up and instead demonstrating convergence through the use of random renormalisation functions supported by novel stochastic estimates.

Nicolas Clozeau, Harprit SinghTue, 10 Ma🔢 math

Rellich-Kondrachov type theorems on the half-space with general singular weights

This paper establishes necessary and sufficient conditions for the compactness of the embedding Hμw1(HN+1)Lμw2(HN+1)H_{\mu_w}^1(\mathbb{H}^{N+1}) \hookrightarrow L_{\mu_w}^2(\mathbb{H}^{N+1}) on the half-space with general singular weights, proving that compactness holds if and only if the measure has finite mass and satisfies a global tightness condition characterized by coercive tail inequalities and, in singular cases, weighted Hardy inequalities.

Yunfan Zhao, Xiaojing ChenTue, 10 Ma🔢 math

\del\delbar\del\delbar-Lemma and Bott-Chern cohomology of twistor spaces

This paper investigates the Bott-Chern and Aeppli cohomologies of twistor spaces associated with compact self-dual 4-manifolds to characterize the validity of the ˉ\partial\bar{\partial}-lemma, while explicitly computing the Dolbeault cohomology for the twistor space of the flat 4-torus as a specific example where the lemma fails.

Anna Fino, Gueo Grantcharov, Nicoletta Tardini, Adriano Tomassini, Luigi VezzoniTue, 10 Ma🔢 math

Some remarks on the exponential separation and dimension preserving approximation for sets and measures

This paper advances the dimension theory of sets and measures by weakening Hochman's exponential separation condition, demonstrating the equivalence of modified and original definitions for homogeneous self-similar IFS on R\mathbb{R}, and proving the density of specific subsets defined by Assouad, Hausdorff, and LqL^q dimensions within their respective spaces.

Saurabh Verma, Ekta Agrawal, Megala MTue, 10 Ma🔢 math