Tootfinder

A Modal de Finetti Theorem: Exchangeability under S4 and S5
Daniel Zantedeschi
https://arxiv.org/abs/2603.27547 https://arxiv.org/pdf/2603.27547 https://arxiv.org/html/2603.27547
arXiv:2603.27547v1 Announce Type: new
Abstract: We introduce modal exchangeability, a symmetry principle for probability measures on Kripke frames: invariance under those automorphisms of the frame that preserve the accessibility relation and fix a designated world. This principle characterizes when an agent's uncertainty over possible-world valuations respects the modal structure. We establish representation theorems that determine the probabilistic consequences of modal exchangeability for S4 and S5 frames. Under S5, where accessibility is an equivalence relation, the classical de Finetti theorem is recovered: valuations are conditionally i.i.d. given a single directing measure. Under S4, where accessibility is a preorder, the accessible cluster decomposes into orbits of the stabilizer group, and valuations within each orbit are conditionally i.i.d. with an orbit-specific directing measure. A rigidity constraint emerges: each directing measure must be constant across its orbit. Rigidity is not assumed but forced by symmetry; it is a theorem, not a modeling choice. The proofs are constructive, requiring only dependent choice (ZF DC), and yield computable representations for recursively presented frames. Rigidity has direct epistemic content: rational agents whose uncertainty respects modal structure cannot assign different latent parameters to worlds within the same orbit. The framework connects probabilistic representation theory to the S4/S5 distinction central to epistemic and temporal logic, with consequences for hyperintensional belief and rational learning under partial information.
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Crosslisted article(s) found for cond-mat.quant-gas. https://arxiv.org/list/cond-mat.quant-gas/new
[1/1]:
- Symmetry-Fractionalized Skin Effects in Non-Hermitian Luttinger Liquids
Christopher Ekman, Emil J. Bergholtz, Paolo Molignini

🇺🇦 #NowPlaying on KEXP's #SeekAndDestroy
Coroner:
🎵 Symmetry
#Coroner
https://coronerofficial.bandcamp.com/track/symmetry
https://open.spotify.com/track/3Yy6e7gPPpzwyLucjximEF

Trump is the biggest threat to D.C.’s architectural splendor since War of 1812
A loosely circular driveway sweeps through the White House grounds, just below the beloved South Portico of the mansion.
Its shape echoes a larger park, known as the Ellipse, which connects the president’s home to the National Mall.
It also mirrors the curving pathways of nearby Lafayette Square, on the north side of the complex.

The simple symmetry of this modest roadway and the grace …

Column | Trump is the biggest threat to D.C.’s architectural splendor since War of 1812
President Trump’s garish, piecemeal changes to Washington’s urban design and architecture are poised to destroy symbolism upheld for centuries.

Full Single-Quantum Control of Particles in Penning Traps for Symmetry Tests at the Quantum Limit
J. M. Cornejo, J. -A. Coenders, A. Lissel, N. Poljakov, M. Prasse, Y. Priewich, J. Schaper, M. Schubert, B. Hampel, M. Schilling, S. Ulmer, C. Ospelkaus
https://arxiv.org/abs/2602.22802

Is there some general theory — just in the hand-wavy “these underlying principles could apply” form of macroeconomics and not necessarily even any kind of falsifiable model — that backs up the notion that increased coupling of risks induces higher investor payouts? or something along those lines?
I feel like “coupling increases the magnitude of failure” and ”coupling increases risk” are more or less self-evident assertions (though of course deserving of study). By some kind of symmetry, it •feels• like coupling could increase payouts too — the billionaires certainly act as though it does! — but that seems less self-evident to me.

Prandtl number dependence of rotating internally heated convection
Rodolfo Ostilla-M\'onico, Ali Arslan
https://arxiv.org/abs/2602.21860 https://arxiv.org/pdf/2602.21860 https://arxiv.org/html/2602.21860
arXiv:2602.21860v1 Announce Type: new
Abstract: We investigate the influence of the Prandtl number ($Pr$) on penetrative internally heated convection (IHC) in both non-rotating and rotating regimes using three-dimensional direct numerical simulations. By varying $Pr$ between 0.1 and 100, we show that the global mean temperature $\langle \overline{T} \rangle$ is not very sensitive to $Pr$, and is primarily controlled by the dynamics of the unstably stratified top boundary layer. In contrast, the Prandtl number dictates the behavior of the lower, stably stratified region and affects the vertical convective heat flux $\langle \overline{wT} \rangle$. In the non-rotating case, low $Pr$ fluids exhibit a ``symmetry recovery'' where turbulent stirring agitates the stable layer, whereas high $Pr$ fluids transition toward a ``dead zone'' of suppressed fluctuations. Under rotation, we find that $\langle \overline{wT} \rangle$ is enhanced across all Prandtl numbers, though global cooling efficiency, measured by the reduction in $\langle \overline{T} \rangle$, is only improved for $Pr\ge1$ due to the emergence of Ekman pumping. These results demonstrate that while IHC shares some scaling similarities with Rayleigh-B\'enard convection at the top boundary, the internal stratification creates a unique sensitivity to $Pr$ that is critical for understanding heat transport in planetary and stellar interiors.
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Urban Demons III 👻
城市鬼魂 III 👻
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🎞️ Rollei RPX 400
If you like my work, buy me a coffee from PayPal #filmphotography

Replaced article(s) found for cs.LG. https://arxiv.org/list/cs.LG/new
[1/6]:
- Towards Attributions of Input Variables in a Coalition
Xinhao Zheng, Huiqi Deng, Quanshi Zhang
https://arxiv.org/abs/2309.13411
- Knee or ROC
Veronica Wendt, Jacob Steiner, Byunggu Yu, Caleb Kelly, Justin Kim
https://arxiv.org/abs/2401.07390
- Rethinking Disentanglement under Dependent Factors of Variation
Antonio Almud\'evar, Alfonso Ortega
https://arxiv.org/abs/2408.07016 https://mastoxiv.page/@arXiv_csLG_bot/112959235461894530
- Minibatch Optimal Transport and Perplexity Bound Estimation in Discrete Flow Matching
Etrit Haxholli, Yeti Z. Gurbuz, Ogul Can, Eli Waxman
https://arxiv.org/abs/2411.00759 https://mastoxiv.page/@arXiv_csLG_bot/113423933393275133
- Predicting Subway Passenger Flows under Incident Situation with Causality
Xiannan Huang, Shuhan Qiu, Quan Yuan, Chao Yang
https://arxiv.org/abs/2412.06871 https://mastoxiv.page/@arXiv_csLG_bot/113632934357523592
- Characterizing LLM Inference Energy-Performance Tradeoffs across Workloads and GPU Scaling
Paul Joe Maliakel, Shashikant Ilager, Ivona Brandic
https://arxiv.org/abs/2501.08219 https://mastoxiv.page/@arXiv_csLG_bot/113831081884570770
- Universality of Benign Overfitting in Binary Linear Classification
Ichiro Hashimoto, Stanislav Volgushev, Piotr Zwiernik
https://arxiv.org/abs/2501.10538 https://mastoxiv.page/@arXiv_csLG_bot/113872351652969955
- Safe Reinforcement Learning for Real-World Engine Control
Julian Bedei, Lucas Koch, Kevin Badalian, Alexander Winkler, Patrick Schaber, Jakob Andert
https://arxiv.org/abs/2501.16613 https://mastoxiv.page/@arXiv_csLG_bot/113910356206562660
- A Statistical Learning Perspective on Semi-dual Adversarial Neural Optimal Transport Solvers
Roman Tarasov, Petr Mokrov, Milena Gazdieva, Evgeny Burnaev, Alexander Korotin
https://arxiv.org/abs/2502.01310
- Improving the Convergence of Private Shuffled Gradient Methods with Public Data
Shuli Jiang, Pranay Sharma, Zhiwei Steven Wu, Gauri Joshi
https://arxiv.org/abs/2502.03652 https://mastoxiv.page/@arXiv_csLG_bot/113961314098841096
- Using the Path of Least Resistance to Explain Deep Networks
Sina Salek, Joseph Enguehard
https://arxiv.org/abs/2502.12108 https://mastoxiv.page/@arXiv_csLG_bot/114023706252106865
- Distributional Vision-Language Alignment by Cauchy-Schwarz Divergence
Wenzhe Yin, Zehao Xiao, Pan Zhou, Shujian Yu, Jiayi Shen, Jan-Jakob Sonke, Efstratios Gavves
https://arxiv.org/abs/2502.17028 https://mastoxiv.page/@arXiv_csLG_bot/114063477202397951
- Armijo Line-search Can Make (Stochastic) Gradient Descent Provably Faster
Sharan Vaswani, Reza Babanezhad
https://arxiv.org/abs/2503.00229 https://mastoxiv.page/@arXiv_csLG_bot/114103018985567633
- Semantic Parallelism: Redefining Efficient MoE Inference via Model-Data Co-Scheduling
Yan Li, Zhenyu Zhang, Zhengang Wang, Pengfei Chen, Pengfei Zheng
https://arxiv.org/abs/2503.04398 https://mastoxiv.page/@arXiv_csLG_bot/114120014622063602
- A Survey on Federated Fine-tuning of Large Language Models
Wu, Tian, Li, Sun, Tam, Zhou, Liao, Xiong, Guo, Li, Xu
https://arxiv.org/abs/2503.12016 https://mastoxiv.page/@arXiv_csLG_bot/114182234054681647
- Towards Trustworthy GUI Agents: A Survey
Yucheng Shi, Wenhao Yu, Jingyuan Huang, Wenlin Yao, Wenhu Chen, Ninghao Liu
https://arxiv.org/abs/2503.23434 https://mastoxiv.page/@arXiv_csLG_bot/114263024618476521
- CONTINA: Confidence Interval for Traffic Demand Prediction with Coverage Guarantee
Chao Yang, Xiannan Huang, Shuhan Qiu, Yan Cheng
https://arxiv.org/abs/2504.13961 https://mastoxiv.page/@arXiv_csLG_bot/114380404041503229
- Regularity and Stability Properties of Selective SSMs with Discontinuous Gating
Nikola Zubi\'c, Davide Scaramuzza
https://arxiv.org/abs/2505.11602 https://mastoxiv.page/@arXiv_csLG_bot/114538965060456498
- RECON: Robust symmetry discovery via Explicit Canonical Orientation Normalization
Alonso Urbano, David W. Romero, Max Zimmer, Sebastian Pokutta
https://arxiv.org/abs/2505.13289 https://mastoxiv.page/@arXiv_csLG_bot/114539124884913788
- RefLoRA: Refactored Low-Rank Adaptation for Efficient Fine-Tuning of Large Models
Yilang Zhang, Bingcong Li, Georgios B. Giannakis
https://arxiv.org/abs/2505.18877 https://mastoxiv.page/@arXiv_csLG_bot/114578778213033886
- SuperMAN: Interpretable and Expressive Networks over Temporally Sparse Heterogeneous Data
Bechler-Speicher, Zerio, Huri, Vestergaard, Gilad-Bachrach, Jess, Bhatt, Sazonovs
https://arxiv.org/abs/2505.19193 https://mastoxiv.page/@arXiv_csLG_bot/114578790124778172
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A One-Step Cascade Symmetric Model: Rank-$1$ Packets, Binary Shielding, and the Even Exact-Cardinality Profile
Frank Gilson
https://arxiv.org/abs/2603.25950 https://arxiv.org/pdf/2603.25950 https://arxiv.org/html/2603.25950
arXiv:2603.25950v1 Announce Type: new
Abstract: We introduce a one-step cascade symmetric system whose local symmetry geometry is organized by finite $\rho$-closed windows and one-step stars rather than by rowwise-independent toggles. The resulting symmetric model isolates a new $ZF DC \neg \mathrm{BPI}$ geometry in which rank-$1$ hereditarily symmetric reals admit a packet normalization theorem over countable $\rho$-closed supports.
The technical center of the paper is the finite star-span lemma and the associated rank-$1$ packet calculus. From this we obtain a normalization theorem and a two-layer coding consequence for rank-$1$ reals (in the metatheory, via a well-orderable base of packets). We then apply the same binary fresh-support shielding pattern to prove $\neg C_2$, hence $\neg AC_{\mathrm{fin}}$, and therefore the failure of every even $C_n$ (where $C_n$ denotes the principle that every family of nonempty $n$-element sets admits a choice function). On the odd side, the present bounded packet calculus remains dyadic: support-fixed local actions factor through finite $2$-groups, bounded support-equivariant quotients of finite local orbits have power-of-two size, and trace-separated bounded rigid ternary families admit canonical selectors within a fixed finite trace window. Accordingly, the odd exact-cardinality profile remains open beyond the current local binary machinery.
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Replaced article(s) found for math.SG. https://arxiv.org/list/math.SG/new
[1/1]:
- Geodesics of positive Lagrangians from special Lagrangians with boundary
Jake P. Solomon, Amitai M. Yuval
https://arxiv.org/abs/2006.06058
- A relative orientation for the moduli space of stable maps to a del Pezzo surface
Jesse Leo Kass, Marc Levine, Jake P. Solomon, Kirsten Wickelgren
https://arxiv.org/abs/2307.01941 https://mastoxiv.page/@arXiv_mathAG_bot/110665833898986051
- From Hitchin Systems to Rational Elliptic Surfaces with C*-actions via Orbifold Hilbert Schemes
Yonghong Huang
https://arxiv.org/abs/2509.14812 https://mastoxiv.page/@arXiv_mathAG_bot/115230240380611333
- Topological 5d $\mathcal{N} = 2$ Gauge Theories: Mirror Symmetry and Langlands Duality of $A_\inf...
Arif Er, Meng-Chwan Tan
https://arxiv.org/abs/2511.15953 https://mastoxiv.page/@arXiv_hepth_bot/115586980934221520
toXiv_bot_toot

Just submitted my latest Swedish Science Council grant proposal: "Navigating the Incomparable"!
We want to build correct-by-construction software for multi-objective optimization—helping safely navigate complex trade-offs like economic costs vs. global temperature rise (see the attached idealised Pareto front).
To do this, we're proposing three connected work packages (see diagram) moving from formal specification, to state-space reduction, and finally scalable exec…

Replaced article(s) found for physics.chem-ph. https://arxiv.org/list/physics.chem-ph/new
[1/1]:
- Split-Flows: Measure Transport and Information Loss Across Molecular Resolutions
Sander Hummerich, Tristan Bereau, Ullrich K\"othe
https://arxiv.org/abs/2511.01464 https://mastoxiv.page/@arXiv_physicschemph_bot/115490816487573744
- Quantum eigenvalue processing
Guang Hao Low, Yuan Su
https://arxiv.org/abs/2401.06240 https://mastoxiv.page/@arXiv_quantph_bot/111758196229197043
- Coupled Lindblad pseudomode theory for simulating open quantum systems
Zhen Huang, Gunhee Park, Garnet Kin-Lic Chan, Lin Lin
https://arxiv.org/abs/2506.10308 https://mastoxiv.page/@arXiv_quantph_bot/114675483322324201
- Cyclic- and helical-symmetry-adapted phonon formalism within density functional perturbation theory
Abhiraj Sharma, Phanish Suryanarayana
https://arxiv.org/abs/2601.08745 https://mastoxiv.page/@arXiv_condmatmtrlsci_bot/115892655431613772
- Bound Trions in Two-Dimensional Monolayers: A Review
Roman Ya. Kezerashvili
https://arxiv.org/abs/2603.08346 https://mastoxiv.page/@arXiv_condmatmeshall_bot/116204368684768448
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Replaced article(s) found for nlin.AO. https://arxiv.org/list/nlin.AO/new
[1/1]:
- Symmetry-induced activity patterns of active-inactive clusters in complex networks
Anil Kumar, V. K. Chandrasekar, D. V. Senthilkumar
https://arxiv.org/abs/2511.03300 https://mastoxiv.page/@arXiv_nlinAO_bot/115501762590964953
- Quantifying Influence and Information Transfer in a Modified Vicsek Model with Non-reciprocal Int...
Jiahuan Pang, Wendong Wang
https://arxiv.org/abs/2506.20888 https://mastoxiv.page/@arXiv_condmatstatmech_bot/114754478375124999
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Chiral states induced by symmetry-breaking in $\alpha-T_3$ lattices: Magnetic field effect
J. P. G. Nascimento, J. M. Pereira Jr., R. N. Costa Filho, F. M. Peeters, M. M. Freire, W. P. Lima, D. R. da Costa
https://arxiv.org/abs/2602.10288

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New symmetry for the imperfect fluid
Alcides Garat
https://arxiv.org/abs/2603.03397 https://arxiv.org/pdf/2603.03397

A $5$-Approximation Analysis for the Cover Small Cuts Problem
Miles Simmons, Ishan Bansal, Joe Cheriyan
https://arxiv.org/abs/2602.01462 https://arxiv.org/pdf/2602.01462 https://arxiv.org/html/2602.01462
arXiv:2602.01462v1 Announce Type: new
Abstract: In the Cover Small Cuts problem, we are given a capacitated (undirected) graph $G=(V,E,u)$ and a threshold value $\lambda$, as well as a set of links $L$ with end-nodes in $V$ and a non-negative cost for each link $\ell\in L$; the goal is to find a minimum-cost set of links such that each non-trivial cut of capacity less than $\lambda$ is covered by a link. Bansal, Cheriyan, Grout, and Ibrahimpur (arXiv:2209.11209, Algorithmica 2024) showed that the WGMV primal-dual algorithm, due to Williamson, Goemans, Mihail, and Vazirani (Combinatorica, 1995), achieves approximation ratio $16$ for the Cover Small Cuts problem; their analysis uses the notion of a pliable family of sets that satisfies a combinatorial property. Later, Bansal (arXiv:2308.15714v2, IPCO 2025) and then Nutov (arXiv:2504.03910, MFCS 2025) proved that the same algorithm achieves approximation ratio $6$. We show that the same algorithm achieves approximation ratio $5$, by using a stronger notion, namely, a pliable family of sets that satisfies symmetry and structural submodularity.
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Development and extension of a monochromatic neutron beamline for neutron polarimetry device characterization at the Spallation Neutron Source
Kavish Imam, Vince Cianciolo, Brad Filippone, Nadia Fomin, Geoffrey Greene, Chenyang Jiang, Jordan O'Kronley, Seppo Penttila, Josh Pierce, John Ramsey, Isaiah Wallace
https://arxiv.org/abs/2602.00167 https://arxiv.org/pdf/2602.00167 https://arxiv.org/html/2602.00167
arXiv:2602.00167v1 Announce Type: new
Abstract: The precise manipulation and analysis of neutron spin states are foundational for a wide range of physics experiments, from fundamental symmetry tests to materials science. To enable systematic characterization of neutron polarimetry devices, we have constructed and extended a monochromatic neutron beamline at the Spallation Neutron Source, Oak Ridge National Laboratory. The beamline delivers monochromatic neutrons and provides a flexible platform for deploying and evaluating advanced neutron spin manipulation instruments. We describe the design and commissioning of the extended beamline and present a proof-of-concept neutron polarimetry study using three devices: a supermirror neutron polarizer, a Mezei spin flipper, and an in situ neutron 3He spin analyzer system. Performance metrics, optimization strategies, and systematic effects are discussed, demonstrating the beamline utility for neutron instrumentation testing. These results establish the extended monochromatic beamline as a useful resource for the development and validation of neutron polarimetry technologies.
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🇺🇦 #NowPlaying on #BBC6Music's #NewMusicFix
Autorhythm:
🎵 Symmetry
#Autorhythm

Relativistic KRCI calculations of symmetry violating interaction constants for YbX (X: Cu, Ag and Au) molecules
Ankush Thakur, Renu Bala, H. S. Nataraj
https://arxiv.org/abs/2604.08478

"The president’s East Wing plan upends the symmetry of the White House"
The obvious solution is to tear down and rebuild the West Wing to match.
(Just you wait and watch.)
#WhiteHouse #strategy #EastWing #renovation #NYT