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2412.15076 2026-05-21 stat.AP

Digital N-of-1 Trials and their Application in Experimental Physiology

数字N-of-1试验及其在实验生理学中的应用

Stefan Konigorski, Mathias Ried-Larsen, Christopher H Schmid

AI总结 本文提出了一种新的N-of-1试验设计,用于在小样本情况下对个体进行有效的统计推断,并通过实验生理学中的实例展示了其应用和分析方法。

Comments Accepted in Experimental Physiology. https://doi.org/10.1113/EP092753

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AI中文摘要

传统上,实验生理学研究通常在小群体的人类受试者、动物模型或细胞系中进行。在小样本量下识别出能够实现足够统计功效以得出正确统计推断,以检测群体层面效应的研究设计一直具有挑战性。此外,传统群体层面推断得出的平均效应不一定适用于个体受试者。在这里,我们介绍N-of-1试验作为一种创新的研究设计,可以用于对个体受试者干预效果进行有效的统计推断,并且可以跨多个研究受试者进行汇总,以比标准群体随机试验更高效地提供群体层面的推断。N-of-1试验自20世纪80年代末以来已在医疗环境中使用,但尚未大规模采用,并且在实验生理学研究环境中应用较少。在本文中,我们介绍了N-of-1试验的关键组成部分和设计特征,描述了结果的统计分析和解释,并通过实验生理学中的实例描述了一些可用的数字工具,以促进其使用。

英文摘要

Traditionally, studies in experimental physiology have been conducted in small groups of human participants, animal models or cell lines. Identifying optimal study designs that achieve sufficient power for drawing proper statistical inferences to detect group level effects with small sample sizes has been challenging. Moreover, average effects derived from traditional group-level inference do not necessarily apply to individual participants. Here, we introduce N-of-1 trials as an innovative study design that can be used to draw valid statistical inference about the effects of interventions on individual participants and can be aggregated across multiple study participants to provide population-level inferences more efficiently than standard group randomized trials. N-of-1 trials have been used in healthcare settings since the late 1980s, but without large-scale adoption and with few applications in experimental physiology research settings. In this manuscript, we introduce the key components and design features of N-of-1 trials, describe statistical analysis and interpretations of the results, and describe some available digital tools to facilitate their use using examples from experimental physiology.

2412.04647 2026-05-21 physics.flu-dyn physics.comp-ph

Fluid-structure coupled simulation framework for lightweight explosion containment structures under large deformations

轻量化爆炸 containment 结构在大变形下的流体-结构耦合模拟框架

Aditya Narkhede, Shafquat Islam, Xingsheng Sun, Kevin Wang

AI总结 本文提出了一种三阶段模拟框架,用于研究轻量化一次性爆炸 containment 结构在大变形下的流体-结构耦合行为,通过耦合有限体积可压缩流体动力学求解器和有限元结构动力学求解器,提高了对爆炸过程和结构变形的模拟精度。

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AI中文摘要

轻量化、一次性爆炸 containment 结构为中和非法爆炸物提供了一种有效的解决方案,结合了经济性和运输便利性。本文介绍了一种三阶段模拟框架,用于捕捉爆破、冲击传播和大塑性结构变形过程中涉及的物理过程和时间尺度。假设结构越轻越灵活,其与气体爆炸产物的动态相互作用越显著。与以往依赖经验模型近似压力载荷不同,该框架采用分区方法耦合有限体积可压缩流体动力学求解器和有限元结构动力学求解器。利用水平集和嵌入边界方法追踪流体-流体和流体-结构界面。界面的质量、动量和能量流通过局部构造和求解一维双材料黎曼问题来计算。所展示的案例研究涉及一个薄壁钢容器承受内部250克TNT爆炸。结果表明,由于塑性变形,容器体积增加了30%,其应变仍低于断裂极限。尽管冲击脉冲携带最高压力,但后续来自波反射的脉冲也对结构变形有显著贡献。爆炸产物的高能量和可压缩性导致高度非线性的流体动力学,冲击速度在空间和时间上均变化。与更简单的模拟方法相比,解耦流体和结构动力学会使塑性应变高估43.75%,而将流体动力学建模为瞬态压力载荷拟合于第一冲击脉冲则会使塑性应变低估31.25%。

英文摘要

Lightweight, single-use explosion containment structures provide an effective solution for neutralizing rogue explosives, combining affordability with ease of transport. This paper introduces a three-stage simulation framework that captures the distinct physical processes and time scales involved in detonation, shock propagation, and large, plastic structural deformations. The hypothesis is that as the structure becomes lighter and more flexible, its dynamic interaction with the gaseous explosion products becomes increasingly significant. Unlike previous studies that rely on empirical models to approximate pressure loads, this framework employs a partitioned procedure to couple a finite volume compressible fluid dynamics solver with a finite element structural dynamics solver. The level set and embedded boundary methods are utilized to track the fluid-fluid and fluid-structure interfaces. The interfacial mass, momentum, and energy fluxes are computed by locally constructing and solving one-dimensional bi-material Riemann problems. A case study is presented involving a thin-walled steel chamber subjected to an internal explosion of $250~\text{g}$ TNT. The result shows a $30\%$ increase in the chamber volume due to plastic deformation, with its strains remaining below the fracture limit. Although the incident shock pulse carries the highest pressure, the subsequent pulses from wave reflections also contribute significantly to structural deformation. The high energy and compressibility of the explosion products lead to highly nonlinear fluid dynamics, with shock speeds varying across both space and time. Comparisons with simpler simulation methods reveal that decoupling the fluid and structural dynamics overestimates the plastic strain by $43.75\%$, while modeling the fluid dynamics as a transient pressure load fitted to the first shock pulse underestimates the plastic strain by $31.25\%$.

2411.05758 2026-05-21 math.ST econ.EM stat.TH

Limit theorems of matching estimators with a fixed number of matches

具有固定匹配数的匹配估计量的极限定理

Songliang Chen, Fang Han

AI总结 本文重新审视Abadie和Imbens针对固定匹配数的最近邻匹配估计量的平均处理效应的极限定理,首次建立了具有显式计算极限方差的非标准化中心极限定理(CLT)。关键在于证明CLT中归一化统计量收敛到其均值,并计算该均值的闭式表达式。前者填补了未发表工作(Abadie和Imbens,2002)中的空白,后者解决了Abadie和Imbens(2006)提出的问题。

Comments In this version, we close a gap in the original submission

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AI中文摘要

本文重新审视Abadie和Imbens针对固定匹配数的最近邻匹配估计量的平均处理效应的极限定理。我们首次建立了具有显式计算极限方差的非标准化中心极限定理(CLT)。关键在于证明CLT中归一化统计量收敛到其均值,并计算该均值的闭式表达式。前者填补了未发表工作(Abadie和Imbens,2002)中的空白,后者解决了Abadie和Imbens(2006)提出的问题。

英文摘要

This paper re-examines the limit theorems of Abadie and Imbens for nearest-neighbor matching estimators of average treatment effects with a fixed number of matches. We establish, for the first time, a non-normalized central limit theorem (CLT) with an explicitly calculated limiting variance. The key ingredients are to prove the convergence of the normalizing statistic appearing in the CLT of Abadie and Imbens to its mean, and to calculate the closed form of the limit of this mean. The former closes a gap in the argument of an unpublished work (Abadie and Imbens, 2002), while the latter resolves a question raised in Abadie and Imbens (2006).

2410.18330 2026-05-21 math.AT

Unstable homotopy groups and Lie algebras

不稳定同调群与李代数

Mark Behrens, Connor Malin

AI总结 本文探讨了李代数在研究不稳定同调群中的作用,总结了相关方法和贡献。

Comments 17 pages v4: added simply connected hypothesis to some statements and conjectures at the end of the paper

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AI中文摘要

我们概述了李代数在研究不稳定同调群中的作用。

英文摘要

We survey the role of Lie algebras in the study of unstable homotopy groups.

2410.11066 2026-05-21 math.OC

Complexity and numerical experiments of a new adaptive generic proximal bundle method

一种新适应性通用近端束方法的复杂性与数值实验

Vincent Guigues, Renato Monteiro, Benoit Tran

AI总结 本文提出了一种适应性通用近端束方法,分析了其复杂性,并在一组优化问题上与两种束方法进行了数值比较。

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AI中文摘要

本文开发了一种自适应通用近端束方法,展示了其复杂性,并在一组优化问题上与两种束方法进行了数值实验比较。

英文摘要

This paper develops an adaptive generic proximal bundle method, shows its complexity, and presents numerical experiments comparing this method with two bundle methods on a set of optimization problems.

2405.20264 2026-05-21 q-bio.PE math.DS

Transmission of multiple pathogens across species

跨物种多重病原体传播

Clotilde Djuikem, Julien Arino

AI总结 本文研究了多种病原体在不同物种间传播的模型,采用分支过程近似计算疾病爆发的概率,并分析了两种宿主物种和一个或两个病原体的水生环境特例。

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AI中文摘要

我们分析了一个描述多种病原体在多种物种内部和之间传播的模型。使用分支过程近似来计算疾病爆发的概率。特别考虑了具有两种宿主物种和一个或两个病原体的水生环境特例,这些特例既在分析上也通过计算方法进行了研究。

英文摘要

We analyse a model that describes the propagation of many pathogens within and between many species. A branching process approximation is used to compute the probability of disease outbreaks. Special cases of aquatic environments with two host species and one or two pathogens are considered both analytically and computationally.

2404.00507 2026-05-21 cs.OS cs.DC

THEMIS: Time, Heterogeneity, and Energy Minded Scheduling for Fair Multi-Tenant Use in FPGAs

THEMIS:面向FPGA多租户公平使用的时空和能耗感知调度

Emre Karabulut, Arsalan Ali Malik, Amro Awad, Aydin Aysu

AI总结 本文提出了一种改进的公平调度算法,通过考虑时空公平性、能耗优化以及异构区域约束,提升多租户FPGA资源分配的公平性和能效。

Comments 12 Pages, 8 Figures, 3 Tables

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AI中文摘要

使用正确的设计指标并理解底层技术的限制对于开发有效的调度算法至关重要。不幸的是,现有调度技术使用了不正确的指标并做出了不现实的假设,导致在多租户FPGA中无法实现公平调度,其中每个租户旨在在空间和时间上共享大致相同的资源数量。本文介绍了一种改进的公平调度算法,针对多租户FPGA使用,解决了之前指标和假设问题,有三个具体改进:首先,我们的方法通过考虑空间和时间方面,确保时空公平性,解决了先前工作假设任务延迟均匀的限制。其次,我们通过调整调度间隔并考虑能耗开销,将能耗考虑纳入公平性中,从而在能耗效率和公平性之间取得平衡。第三,我们承认FPGA多租户中被忽视的方面,包括异构区域和动态合并/拆分部分可重构区域的约束。我们开发并评估了这些三个改进的改进公平调度算法。受希腊正义女神的启发,我们将公平调度解决方案命名为THEMIS:时间、异构性和能耗感知调度。我们使用Xilinx Zedboard XC7Z020量化我们的方法的节省。与以前的算法相比,我们的改进调度算法在公平性方面提高了24.2-98.4%,并允许在能耗与公平性之间进行55.3倍的权衡。本文因此向云提供商提供了关于未来公平性调度优化的相关挑战和机会的信息。

英文摘要

Using correct design metrics and understanding the limitations of the underlying technology is critical to developing effective scheduling algorithms. Unfortunately, existing scheduling techniques used \emph{incorrect} metrics and had \emph{unrealistic} assumptions for fair scheduling of multi-tenant FPGAs where each tenant is aimed to share approximately the same number of resources both spatially and temporally. This paper introduces an enhanced fair scheduling algorithm for multi-tenant FPGA use, addressing previous metric and assumption issues, with three specific improvements claimed First, our method ensures spatiotemporal fairness by considering both spatial and temporal aspects, addressing the limitation of prior work that assumed uniform task latency. Second, we incorporate energy considerations into fairness by adjusting scheduling intervals and accounting for energy overhead, thereby balancing energy efficiency with fairness. Third, we acknowledge overlooked aspects of FPGA multi-tenancy, including heterogeneous regions and the constraints on dynamically merging/splitting partially reconfigurable regions. We develop and evaluate our improved fair scheduling algorithm with these three enhancements. Inspired by the Greek goddess of law and personification of justice, we name our fair scheduling solution THEMIS: \underline{T}ime, \underline{H}eterogeneity, and \underline{E}nergy \underline{Mi}nded \underline{S}cheduling. We used the Xilinx Zedboard XC7Z020 to quantify our approach's savings. Compared to previous algorithms, our improved scheduling algorithm enhances fairness between 24.2--98.4\% and allows a trade-off between 55.3$\times$ in energy vs. 69.3$\times$ in fairness. The paper thus informs cloud providers about future scheduling optimizations for fairness with related challenges and opportunities.

2402.14721 2026-05-21 physics.chem-ph physics.optics

Anomalous Giant Superradiance in Molecular Aggregates Coupled to Polaritons

分子聚集体耦合极子中的异常巨级辐射

Yi-Ting Chuang, Liang-Yan Hsu

AI总结 研究揭示了分子聚集体耦合到表面等离子体极子时的异常巨级辐射现象,通过电磁场量化的研究,证明极子显著增强了级辐射并使其行为超越了Dick的N缩放定律,推导出适用于任意色散和吸收介质中分子聚集体的级辐射率解析表达式,并展示了分子间距离对这种非凡级辐射的重要性。

Journal ref Phys. Rev. Lett. 133, 128001 (2024)

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AI中文摘要

在本研究中,我们揭示了分子聚集体耦合到表面等离子体极子时的异常巨级辐射现象。通过在介质中对电磁场进行量子化,我们证明极子显著增强了级辐射,并且其行为明显超越了Dick的N缩放定律。为了理解这种异常现象的机制,我们推导出适用于分子聚集体在任意色散和吸收介质中的级辐射率的解析表达式。此外,我们展示了分子间距离对于这种非凡级辐射的重要性。

英文摘要

In this study, we unveil an eccentric superradiance phenomenon in molecular aggregates coupled to surface plasmon polaritons. Through the quantization of electromagnetic fields in media, we demonstrate that superradiance can be significantly enhanced by polaritons and its behavior distinguishably surpasses the Dick's $N$ scaling law. To understand the mechanism of this anomalous phenomenon, we derive an analytical expression of the superradiance rate, which is general for molecular aggregates in arbitrary dispersive and absorbing media. Furthermore, we show the importance of intermolecular distance for this extraordinary superradiance.

2312.13063 2026-05-21 quant-ph

Microscopic theory of exciton-polariton model involving multiple molecules: Macroscopic quantum electrodynamics formulation and essence of direct intermolecular interactions

关于涉及多种分子的极子-极化子模型的微观理论:宏观量子电动力学的表述及直接分子间相互作用的本质

Yi-Ting Chuang, Liang-Yan Hsu

AI总结 本文通过宏观量子电动力学推导出包含自由空间偶极子-偶极子相互作用的有效耗散CQED模型,揭示了在研究多分子极子-极化子系统时直接分子间相互作用的重要性。

Journal ref J. Chem. Phys. 160, 114105 (2024)

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AI中文摘要

腔量子电动力学(CQED)及其扩展被广泛用于描述极子-极化子系统。然而,基于CQED的极子-极化子模型在不同背景下差异很大。这些CQED模型中最显著的分歧之一是是否应在CQED哈密顿量中包含直接分子间相互作用。为回答这一问题,本文从基于宏观量子电动力学的微观哈密顿量出发,推导出包含自由空间偶极子-偶极子相互作用(CQED-DDI)的有效耗散CQED模型。耗散CQED-DDI成功捕捉了介电介质中真空波动的性质,并将其分为自由空间效应和介电诱导效应。前者包括自由空间中的自发辐射、相位失配和偶极子-偶极子相互作用;后者包括极子-极化子相互作用和由于介电介质导致的光子损耗。本文将耗散CQED-DDI应用于研究极子-极化子动力学(分子在等离子体表面上方的群体动力学),并将其结果与之前研究中提出的方法的结果进行比较。发现当使用CQED-like模型研究涉及多种分子的极子-极化子系统时,直接分子间相互作用是一个关键要素。

英文摘要

Cavity quantum electrodynamics (CQED) and its extensions are widely used for the description of exciton-polariton systems. However, the exciton-polariton models based on CQED vary greatly within different contexts. One of the most significant discrepancies among these CQED models is whether one should include direct intermolecular interactions in the CQED Hamiltonian. To answer this question, in this article, we derive an effective dissipative CQED model including free-space dipole-dipole interactions (CQED-DDI) from a microscopic Hamiltonian based on macroscopic quantum electrodynamics. Dissipative CQED-DDI successfully captures the nature of vacuum fluctuations in dielectric media and separates it into the free-space effects and the dielectric-induced effects. The former include spontaneous emissions, dephasings and dipole-dipole interactions in free space; the latter include exciton-polariton interactions and photonic losses due to dielectric media. We apply dissipative CQED-DDI to investigate the exciton-polariton dynamics (the population dynamics of molecules above a plasmonic surface) and compare the results with those based on the methods proposed by several previous studies. We find that direct intermolecular interactions are a crucial element when employing CQED-like models to study exciton-polariton systems involving multiple molecules.

2310.09105 2026-05-21 econ.EM

Estimating Individual Responses when Tomorrow Matters

当明天重要时估计个体响应

Stephane Bonhomme, Angela Denis

AI总结 本文提出了一种方法,用于估计个体期望如何影响他们对假设变化的反应。该方法基于平均偏效应,在特定条件下恢复假设影响。我们提出了一种三步估计方法,依赖于主观期望的面板数据。在消费和储蓄模型中,我们展示了该方法,重点是收入税对当前收入和未来收入信念影响的冲击。应用我们的方法于意大利调查数据,发现个体信念对税收政策对消费决策的影响评估至关重要。

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AI中文摘要

我们提出了一种方法,用于估计个体期望如何影响他们对假设变化的反应。该方法基于平均偏效应,在我们指定的条件下恢复假设影响。我们提出了一种三步估计方法,依赖于主观期望的面板数据。我们在消费和储蓄模型中展示了我们的方法,重点是收入税不仅改变当前收入,还影响对未来收入的信念的影响。应用我们的方法于意大利调查数据,我们发现个体的信念对税收政策对消费决策的影响评估至关重要。

英文摘要

We propose an approach to estimate how individuals' expectations influence their responses to a counterfactual change. The approach relies on average partial effects, which recover counterfactual impacts under conditions that we specify. We propose a three-step estimation method that relies on panel data on subjective expectations. We illustrate our approach in a model of consumption and saving, focusing on the impact of an income tax that not only changes current income but also affects beliefs about future income. Applying our approach to Italian survey data, we find that individuals' beliefs matter for evaluating the impact of tax policies on consumption decisions.

2308.00780 2026-05-21 math.AG math-ph math.MP

Higher Genus Gromov-Witten Theory of C^n/Z_n II: Crepant Resolution Correspondence

高等亏格格罗莫夫-维滕理论 of C^n/Z_n II: 曲面解析对应关系

Deniz Genlik, Hsian-Hua Tseng

AI总结 本文研究了 $K\mathbb{P}^{n-1}$ 的高等亏格格罗莫夫-维滕理论的结构,证明了其格罗莫夫-维滕势在多项式环中,并建立了 $K\mathbb{P}^{n-1}$ 与 $[\mathbb{C}^n/\mathbb{Z}_n]$ 的曲面解析对应关系。

Comments to appear in Advances in Mathematics

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AI中文摘要

我们研究了 $K\mathbb{P}^{n-1}$ 的高等亏格格罗莫夫-维滕理论的结构。我们通过详细研究其上同调场理论(CohFT)的细节,证明了 $K\mathbb{P}^{n-1}$ 的格罗莫夫-维滕势位于一个显式的多项式环中,利用了 Givental-Teleman 对半简单 CohFT 的分类。在 arXiv:2301.08389 中,我们对 $[\mathbb{C}^n/\mathbb{Z}_n]$ 进行了平行研究,并证明了其格罗莫夫-维滕势也位于类似的多项式环中。本文的主要结果是对于 $K\mathbb{P}^{n-1}$ 和 $[\mathbb{C}^n/\mathbb{Z}_n]$ 的高等亏格格罗莫夫-维滕理论的曲面解析对应关系,通过建立与 $K\mathbb{P}^{n-1}$ 和 $[\mathbb{C}^n/\mathbb{Z}_n]$ 相关的多项式环之间的同构来证明。本文将 Lho-Pandharipande 在 arXiv:1804.03168 中针对 $[\mathbb{C}^3/\mathbb{Z}_3]$ 的工作以及 Lho 在 arXiv:2211.15878 中针对 $[\mathbb{C}^5/\mathbb{Z}_5]$ 的工作推广到任意 $n \geq 3$ 的情况。

英文摘要

We study the structure of the higher genus Gromov-Witten theory of the total space $K\mathbb{P}^{n-1}$ of the canonical bundle of the projective space $\mathbb{P}^{n-1}$. We prove the finite generation property for the Gromov-Witten potential of $K\mathbb{P}^{n-1}$ by working out the details of its cohomological field theory (CohFT). More precisely, we prove that the Gromov-Witten potential of $K\mathbb{P}^{n-1}$ lies in an explicit polynomial ring using the Givental-Teleman classification of the semisimple CohFTs. In arXiv:2301.08389, we carried out a parallel study for $[\mathbb{C}^n/\mathbb{Z}_n]$ and proved that the Gromov-Witten potential of $[\mathbb{C}^n/\mathbb{Z}_n]$ lies in a similar polynomial ring. The main result of this paper is a crepant resolution correspondence for higher genus Gromov-Witten theories of $K\mathbb{P}^{n-1}$ and $[\mathbb{C}^n/\mathbb{Z}_n]$, which is proved by establishing an isomorphism between the polynomial rings associated to $K\mathbb{P}^{n-1}$ and $[\mathbb{C}^n/\mathbb{Z}_n]$. This paper generalizes the works of Lho-Pandharipande arXiv:1804.03168 for the case of $[\mathbb{C}^3/\mathbb{Z}_3]$ and Lho arXiv:2211.15878 for the case $[\mathbb{C}^5/\mathbb{Z}_5]$ to arbitrary $n\geq 3$.

2211.15878 2026-05-21 math.AG

Holomorphic anomaly equations for $\mathbb{C}^5/\mathbb{Z}_5$

$\mathbb{C}^5/\mathbb{Z}_5$的全纯异常方程

Deniz Genlik, Hsian-Hua Tseng

AI总结 本文研究了$\mathbb{C}^5/\mathbb{Z}_5$的全纯异常方程,通过证明相关方程来揭示该空间的几何性质和拓扑结构。

Comments agrees with the published version

Journal ref In: Kang, NG., Ciocan-Fontanine, I., Favero, D., Lee, YP., Lho, H., Oh, J. (eds) Categorical and Enumerative Aspects of Mirror Symmetry. KIAS 2022. KIAS Springer Series in Mathematics, vol 5. Springer, Singapore

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AI中文摘要

我们证明了对于$\mathbb{C}^5/\mathbb{Z}_5$的全纯异常方程。

英文摘要

We prove holomorphic anomaly equations for $\mathbb{C}^5/\mathbb{Z}_5$.

2209.08832 2026-05-21 math.AP math-ph math.MP

Mean field, hydrodynamic and graph limits for deterministic interacting particle systems: a survey with quantitative estimates

确定性相互作用粒子系统的均场、水动力学和图极限:一种带有定量估计的综述

Thierry Paul, Emmanuel Trélat

AI总结 本文研究确定性相互作用粒子系统中均场、水动力学和图极限的统一框架,通过定量估计分析这些极限过程的比较及它们之间的转换条件,同时探讨框架的局限性,如奇异核和随机动力学的影响。

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AI中文摘要

我们提出一个统一的框架,带有定量估计,用于研究其成对相互作用可能依赖于异质标签的确定性相互作用粒子系统。通过在状态中添加冻结标签变量$x\inΩ$来保持异质性。在此框架内,我们比较了几种极限过程:直接连续/图极限、产生Vlasov方程的均场极限、粒子系统的Liouville提升以及通过任意阶边际传播的混沌。我们为这些极限提供一个共同的语言,并精确识别各种转换是否可交换;特别是,我们将连续/图极限方程与经典的水动力学欧拉方程分开,并表征当前者作为后者的动量闭合出现的情况(线性在$(ξ,ξ')$或单动能假设)。在此过程中,我们证明了图极限以及从粒子或Liouville到Vlasov的转换的定量收敛估计,并讨论了该框架的局限性,特别是关于奇异核和随机动力学的问题。本文以综述形式撰写,包含原创贡献,强调估计、示例和明确的范围界定。

英文摘要

We present a unified framework, with quantitative estimates, for deterministic interacting particle systems whose pairwise interactions may depend on heterogeneous labels. Heterogeneity is kept at every level by adding a frozen label variable $x\inΩ$ to the state. Within this framework we compare several limiting procedures: the direct continuum / graph limit, the mean field limit yielding a Vlasov equation on the extended space of labels and states, the Liouville lift of the particle system together with propagation of chaos through marginals of arbitrary order, and the hydrodynamic moment closures. We give a common language for these limits and identify precisely where the various passages commute and where they do not; in particular, we separate the continuum / graph limit equation from the classical hydrodynamic Euler equations and characterize when the former arises as a moment closure of the latter (linearity in $(ξ,ξ')$ or monokinetic ansatz). Along the way, we prove quantitative convergence estimates for the graph limit and for the passages from particles or Liouville to Vlasov, and we discuss the limitations of the framework, in particular concerning singular kernels and stochastic dynamics. The paper is written as a survey with original contributions, with an emphasis on estimates, examples, and a clear delineation of scope.

2208.07532 2026-05-21 math.DG math.GT

Limits of Cubic Differentials and Buildings

立方微分的极限与建筑

John Loftin, Andrea Tamburelli, Michael Wolf

AI总结 本文研究了在SL(3,R)中表面群表示的Hitchin组件中立方微分的渐进行为,通过局部不变量描述holonomy沿射线的渐近公式,并展示了相应等距谐波映射族收敛到该空间的渐近锥的谐波映射,同时描述了图像的弱凸性及(1/3)翻译表面性质。

Comments 49 pages, 3 figures

Journal ref Proc. Lond. Math. Soc. 132 (2026), no. 4

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AI中文摘要

在Labourie-Loftin参数化下,我们证明了在SL(3,R)中表面群表示的Hitchin组件中,holonomy沿射线的渐近公式可由定义该射线的全纯微分的局部不变量给出。全局上,我们显示相应等距谐波映射族收敛到该空间的渐近锥的谐波映射。图像的几何也可由该微分描述:它是一个弱凸的(1/3)翻译表面。我们在此设定下为三角群的Hitchin组件定义了一个紧化,该紧化尊重由Hitchin微分参数化的结构。

英文摘要

In the Labourie-Loftin parametrization of the Hitchin component of surface group representations into SL(3,R), we prove an asymptotic formula for holonomy along rays in terms of local invariants of the holomorphic differential defining that ray. Globally, we show that the corresponding family of equivariant harmonic maps to a symmetric space converge to a harmonic map into the asymptotic cone of that space. The geometry of the image may also be described by that differential: it is weakly convex and a (one-third) translation surface. We define a compactification of the Hitchin component in this setting for triangle groups that respects the parametrization by Hitchin differentials.

2205.14765 2026-05-21 math.AP math-ph math.MP

On the Existence of Self-Similar solutions for some Nonlinear Schrödinger equations

关于某些非线性薛定谔方程自相似解存在的研究

Avy Soffer, Xiaoxu Wu

AI总结 本文研究了非线性薛定谔方程的自相似解的存在性,构造了全局解,并探讨了其稳定性及在大时间行为中的作用。

Comments The paper has been rewritten. Comments welcome!

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AI中文摘要

我们构造了薛定谔方程的解,这些解在时间趋于无穷大时呈现自相似性。此外还包括了双气泡情形。这些解是全局的,具有非零的 $L^2$ 范数,并且是稳定的。因此,它们不属于线性波和局部化波的标准渐进行为。此类弱局部化解基于之前关于一般色散方程大时间行为的工作 \cite{Liu-Sof1,Liu-Sof2} 被预期。证明了可以将此类解与一个散射通道相关联,其中扩张算子作为渐近的 ``哈密顿量''。

英文摘要

We construct solutions of Schrödinger equations which are asymptotically self-similar solutions as time goes to infinity. Also included are situations with two bubbles. These solutions are global, with non-zero $L^2$ norms, and are stable. As such they are not of the standard asymptotic decomposition of linear waves and localized waves. Such weakly localized solutions were expected in view of previous works \cite{Liu-Sof1,Liu-Sof2} on the large time behavior of general dispersive equations. It is shown that one can associate a \emph{scattering channel} to such solutions, with the dilation operator as the asymptotic ``Hamiltonian''.

2108.11881 2026-05-21 hep-th astro-ph.CO gr-qc

Reconstructing slow-roll Scalar-Tensor Gauss-Bonnet single field inflation from running spectral data

从运行谱数据重建慢-roll标量-张量Gauss-Bonnet单场通胀

A. Belhaj, H. Es-Sobbahi, M. Oualaid, E. Torrente-Lujan

AI总结 本文研究了标量-张量模型中慢-roll近似下观测量的理论预测,包括谱指数、标量-张量比及其运行和运行的运行,并探讨了这些参数之间的约束关系,结合最新普朗克观测数据进行分析。

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AI中文摘要

我们研究了一类由标量依赖的非最小动能耦合和Gauss-Bonnet项特征化的标量-张量模型中的宇宙膨胀。利用慢-roll近似,我们详细计算了观测量的理论预期,包括谱指数、标量-张量比、其运行以及运行的运行,这些都以标量-张量模型的参数表示。给出了与标量和张量扰动及更高阶运行参数相关的自洽方程层次,并在慢-roll近似下研究了感兴趣的模型类型。我们为特定模型详细推导了这些参数之间的约束表达式,并与最新普朗克观测数据进行对比。

英文摘要

We examine cosmological inflation in a broad family of scalar-tensor models characterized by scalar-dependent non minimal kinetic couplings and Gauss-Bonnet terms. Using a slow roll-approximation, we compute in detail theoretical expectations of observables as spectral indexes, scalar-to-tensor ratio, their running and their running of the running in terms of the parameters which characterize the scalar-tensor model. Hierarchies of consistency equations relating scalar and tensor pertubations and higher order running parameters are presented and examined at the slow roll approximation for the kind of models of interest in this work. From We find detailed expressions for constraints among these parameters. For a specific model, we analyse such quantities and make contact with latest Planck observational data .

1909.13230 2026-05-21 math.NT math.HO

Introducing and Applying S.C.E Model Under Dusart's Inequality to Prove Goldbach's Strong Conjecture for 74 Typical Structures out of All 75 Structural Types of Even Number

在Dusart不等式下引入并应用S.C.E模型以证明Goldbach强猜想的74种典型结构

Aref Zadehgol Mohammadi, Mohsen Kolahdouz

AI总结 本文通过引入S.C.E模型并结合Dusart不等式,证明了74种典型结构满足Goldbach强猜想,并提出了三个未证明的不等式以进一步验证该猜想。

Comments 7 pages, 4 figures, 2 tables, Relative Goldbach's Strong Conjecture Proof

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AI中文摘要

在本文中,我们给出了Goldbach强猜想的相对证明。为此,我们首先提出了一种表示偶数的启发式模型,称为偶数半连续模型(S.C.E模型),然后利用该模型将所有偶数分为75种不同的典型结构。在此方向上,我们结合该模型和以下不等式来获得相对证明:egin{equation} rac{x}{\ln x} \leq_{x \geq 17} π(x) \leq_{x>1} 1.2251 rac{x}{\ln x} \end{equation}其中$π(x)$表示小于等于$x$的所有素数个数。该不等式由Pierre Dusart在他的论文[P. Dusart, Explicit estimates of some functions over primes, Ramanujan J. 45 (2016), No. 1, 227-251]中提出。事实上,通过相对证明意味着75种结构中的74种满足Goldbach强猜想。此外,由于最后一个典型结构是所有偶数中的主导结构,我们利用每个不等式来证明该结构的Goldbach强猜想。有必要说明的是,我们猜测这三个不等式可以像Dusart不等式一样被证明。

英文摘要

In this paper, we present a relative proof for Goldbach's strong conjecture. To this end, we first present a heuristic model for representing even numbers called Semi-continuous Model for Even Numbers or briefly S.C.E Model, and then by using this model we categorize all even numbers into 75 distinct typical structures. Also in this direction, we employ this model along with the following inequality to obtain the relative proof \begin{equation} \frac{x}{\ln x} \leq_{x \geq 17} π(x) \leq_{x>1} 1.2251 \frac{x}{\ln x} \end{equation} where $π(x)$ denotes the number of all primes smaller than and equal to $x$. This inequality is presented by Pierre Dusart in his paper [P. Dusart, Explicit estimates of some functions over primes, Ramanujan J. 45 (2016), No. 1, 227-251]. In fact, by relative proof we mean that 74 typical structures out of 75 ones satisfy Goldbach's strong conjecture. Also, since the last typical structure is the dominant structure over all even numbers, we come up with three unproven inequalities for elements of S.C.E model using each of which, we can prove Goldbach's strong conjecture for this structure too. It is necessary to say that, we guess theses three inequalities can be proved the same as to Dusart's inequality.

1806.05094 2026-05-21 math.CO math.AG math.RT

A combinatorial approach to scattering diagrams

散射图的组合方法

Nathan Reading

AI总结 本文通过组合方法研究散射图,特别是簇散射图,推导了有限型rank-2散射图极限墙函数,并展示了有向有限型中通过Cambrian风扇和可排序元素构造簇散射图的方法。

Comments The second half of arXiv:1712.06968, which was originally "Scattering diagrams and scattering fans". The contents of this paper will be removed from arXiv:1712.06968, which will be re-titled "Scattering fans." Version 2: Minor expository changes. (We thank some anonymous referees for helpful comments.) Version 3: Corrections to reconcile the arXiv version with the final pre-publication version

Journal ref Algebraic Combinatorics 3 (2020) no. 3, pp. 603-636

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AI中文摘要

散射图起源于镜像对称的背景,但最近发展出一种特殊的散射图(簇散射图),用于证明簇代数的关键结构结果。我们利用与簇代数的联系,计算了有限型rank-2簇散射图极限墙函数。在斜对称有限型rank-2情况下,这恢复了Reineke的公式。在相同情况下,我们展示了带符号的Narayana数生成函数在簇变量类似的角色中出现。在无环有限型中,我们从Cambrian风扇和可排序元素构造无环有限型的簇散射图,并给出了一个简单的直接证明。

英文摘要

Scattering diagrams arose in the context of mirror symmetry, but a special class of scattering diagrams (the cluster scattering diagrams) were recently developed to prove key structural results on cluster algebras. We use the connection to cluster algebras to calculate the function attached to the limiting wall of a rank-2 cluster scattering diagram of affine type. In the skew-symmetric rank-2 affine case, this recovers a formula due to Reineke. In the same case, we show that the generating function for signed Narayana numbers appears in a role analogous to a cluster variable. In acyclic finite type, we construct cluster scattering diagrams of acyclic finite type from Cambrian fans and sortable elements, with a simple direct proof.