Tootfinder

📰 Vielen Dank für Eure #Spenden zur Unterstützung der Technikkosten, um alles am Laufen zu halten. Shoutout an alle #Steady-Förderer! 👍
Über 30 Seiten wurden bereits von den vermaledeiten Amazon-Affiliate-Links befreit.
Hier kann man Steady-Mäzen werden:

KlimaCrew
Ich informiere über Zukunftsthemen, um Menschen vor Risiken zu warnen und Fortschritte sichtbar zu machen.

The Maxwell-Higgs System with Scalar Potential on Subextremal Kerr Spacetimes: Nonlinear wave operators and asymptotic completeness
Bobby Eka Gunara, Mulyanto, Fiki Taufik Akbar
https://arxiv.org/abs/2603.04202

Ionization energies for Rydberg $^4 \mathrm{He}$ ($1snp\,^{1,3}P$) states using the correlated B-spline basis function method
Jing Chi, Hao Fang, Yong-Hui Zhang, Li-Yan Tang, Ting-Yun Shi
https://arxiv.org/abs/2606.04768

wir schreiben das jahr 2026 – und immer noch gibt es journals mit page und colour charges. 🙄
dieses beispiel: https://ar.iiarjournals.org/content/instructions-authors

[2026-05-05 Tue (UTC), no new articles found for math.KT K-Theory and Homology]
toXiv_bot_toot

There's a statistical test called Page's trend test, for testing whether a predicted *ordering* holds — so it would be funny if it were to get renamed to "Page's rank".
https://en.wikipedia.org/wiki/Page's_trend_test

[2026-04-03 Fri (UTC), 12 new articles found for astro-ph.GA Astrophysics of Galaxies]
toXiv_bot_toot

Braneworld cosmology in $f(\mathbb{Q})$ gravity
J. J. Ramos, J. E. G. Silva
https://arxiv.org/abs/2603.03435 https://arxiv.org/pdf/2603.03435

@birb https://jjs.page/

Bridging Distant Ideas: the Impact of AI on R&D and Recombinant Innovation
Emanuele Bazzichi, Massimo Riccaboni, Fulvio Castellacci
https://arxiv.org/abs/2604.02189 https://…

Atom Interferometry with Transverse Optical Modes
Ryan Husband, Ryan J. Thomas, Yosri Ben-A\"icha, Rhys H. Eagle, Jessica Eastman, John E. Debs, Patrick J. Everitt, Michael Larsen, Eric Imhof, Charles A. Sackett, John D. Close, Simon A. Haine, Samuel Legge
https://arxiv.org/abs/2606.04430

"It places page cache pages in a writable scatterlist, separated from the legitimate write region by nothing more than an offset boundary. The design assumes every AEAD algorithm will confine its writes to the intended destination, but nothing in the API enforces this, and nothing documents it as a requirement.
Unfortunately, one AEAD algorithm breaks this silent invariant."
"No other standard AEAD algorithm in the kernel [uses memory that doesn't belong to it as a scratch pad]. GCM, CCM, and regular authenc all confine their writes to the legitimate output area. authencesn alone writes past the boundary."
I'm actually amazed that there's only one bug here. Somehow almost everyone just managed to do the right thing, despite no mechanism enforcing it and no documentation describing it. That's just amazing. It's a testament to the skill of those developers, despite an incredibly bad design.
#copyfail

Is 2026 the comeback year for running backs? Insid... https://www.espn.com/fantasy/football/story/_/page/FFMockDraft-48610592/2026-fantasy-football-mock-draft-post-nfl-draft

[2026-05-04 Mon (UTC), no new articles found for math.KT K-Theory and Homology]
toXiv_bot_toot

Just patched my server against the https://copy.fail exploit:
https://askubuntu.com/a/1566257

Copy Fail — 732 Bytes to Root
CVE-2026-31431. 100% Reliable Linux LPE — no race, no per-distro offsets, page-cache write that bypasses on-disk file-integrity tools and crosses containers. Found by Xint Code.

I’m not going to say that I "love" LibreOffice but I have used it for over a decade because a few times a month I need to do spreadsheety things, so almost every time it adds a menu to the menu bar (with a little globe for some reason) that takes me to this dialog.
In my years using LO, the only changes have been the version numbers. Given how "Download…" has always gone to a donation page, I feel certain that there’s no intention of automatic download *ever* being…

Denoising data reduction algorithm for Topological Data Analysis
Seonmi Choi, Semin Oh, Jeong Rye Park, Seung Yeop Yang
https://arxiv.org/abs/2603.29248 https://

edit_wikinews: Wikipedia news edits (2010)
Two bipartite user-page networks extracted from Wikipedia, about news events. A user connects to a page if that user edited that page. Edits (edges) are timestamped. Edge weights represent counts of the number of edits.
This network has 2511 nodes and 7745 edges.
Tags: Informational, Web graph, Multigraph, Timestamps

Gravitational confinement of ghost scalar fields in neutron stars
Argelia Bernal, V\'ictor Jaramillo, N\'estor A. Montiel-Hern\'andez, Dar\'io N\'u\~nez, Nicolas Sanchis-Gual
https://arxiv.org/abs/2603.04400

Photon shot-noise-limited Rydberg-EIT electrometry
Gyeongmin Ju, Ye Jin Yu, Heewoo Kim, Hansol Jeong, Jinhyuk Bae, Changhoon Baek, Han Seb Moon
https://arxiv.org/abs/2606.04354 …

[2026-03-31 Tue (UTC), 4 new articles found for cs.CC Computational Complexity]
toXiv_bot_toot

Poll: 31% of US adults expect driverless cars to be common within five years, up from 19% in 2018, and 19% say they would own or lease one, the same as in 2018 (Mary Page James/Gallup)
https://news.gallup.com/poll/708683/americans-driverless-car-fut…

More Americans See Driverless Car Future; Few Show Interest
Expectations of widespread driverless car use are up sharply since 2018, yet personal interest is flat, safety confidence has declined, and relatively few Americans have tried one.

Ordering Power is Sanctioning Power: Sanction Evasion-MEV and the Limits of On-Chain Enforcement
Di Wu, Yuman Bai, Shoupeng Ren, Xinyu Zhang, Yiyue Cao, Xuechao Wang, Wu Wen, Jian Liu
https://arxiv.org/abs/2603.27739

All Substitution Is Local
Nidhish Shah, Shaurjya Mandal, Asfandyar Azhar
https://arxiv.org/abs/2604.01443 https://arxiv.org/pdf/2604.01443

Time is Not Compute: Scaling Laws for Wall-Clock Constrained Training on Consumer GPUs
Yi Liu
https://arxiv.org/abs/2603.28823 https://arxiv.org/pdf/2603.28823 https://arxiv.org/html/2603.28823
arXiv:2603.28823v1 Announce Type: new
Abstract: Scaling laws relate model quality to compute budget (FLOPs), but practitioners face wall-clock time constraints, not compute budgets. We study optimal model sizing under fixed time budgets from 5 minutes to 24 hours on consumer GPUs (RTX 4090). Across 70 runs spanning 50M--1031M parameters, we find: (1)~at each time budget a U-shaped curve emerges where too-small models overfit and too-large models undertrain; (2)~optimal model size follows $N^* \propto t^{0.60}$, growing \emph{faster} than Chinchilla's $N^* \propto C^{0.50}$, with $\alpha = 0.60 \pm 0.07$ robustly exceeding compute-optimal across all sensitivity analyses; (3)~a \emph{dual U-shape mechanism}: short-budget U-curves arise from compute bottlenecks, while long-budget U-curves emerge from data bottlenecks (overfitting), with an intermediate regime where the U-curve temporarily disappears. These findings have immediate implications for researchers training on consumer hardware, where wall-clock time -- not FLOPs -- is the binding constraint. We release all code, logs, and 70 experimental configurations.
toXiv_bot_toot

The most important, efficacious, & sizeable faction on the left is plain old "normie Dems", or whatever condescending term you prefer.
They're the ones doing the actual work.
But they are largely ignored by media, because they're organized & led by women.
https://skywriter.blue/@vol…

Crosslisted article(s) found for math.CT. https://arxiv.org/list/math.CT/new
[1/1]:
- The Image of Functor Morphing
Ehud Meir
https://arxiv.org/abs/2603.26368 https://mastoxiv.page/@arXiv_mathRT_bot/116317084548940951
- The motivic tt-geometry of real quadrics
Jean Paul Schemeil
https://arxiv.org/abs/2603.26492 https://mastoxiv.page/@arXiv_mathAG_bot/116317122890328019
toXiv_bot_toot

Non-Hermitian Quantum Mechanics with Applications to Gravity
Oem Trivedi, Alfredo Gurrola, Robert J. Scherrer
https://arxiv.org/abs/2603.04375 https://arxi…

[2026-06-04 Thu (UTC), 6 new articles found for physics.atom-ph Atomic Physics]
toXiv_bot_toot

Constraints on the Galactic Chemical Evolution of $^3\rm{He}$
Miqaela K. Weller, David H. Weinberg
https://arxiv.org/abs/2604.01289 https://arxiv.org/pdf/2…

"Nobody connected the 2017 in-place optimization to authencesn's scratch writes or to the splice path's use of page cache pages. Each change was reasonable in isolation. The vulnerability exists at the intersection of all three, and has been silently exploitable for nearly a decade."
Basically, a 6 year old bit of code that was not vulnerable when written became vulnerable after multiple API changes. So this is really a tech debt problem.

Non-minimally coupled loop quantum inflation with inverse-volume corrections
Rudranil Roy, Giovanni Otalora, Joel Saavedra, Salvatore Capozziello
https://arxiv.org/abs/2603.04182

What aggregation rules can be classified as logical concepts?
Nikolay L. Poliakov
https://arxiv.org/abs/2604.01260 https://arxiv.org/pdf/2604.01260

Purely optical macroscopic trap for alkaline-earth and similar atoms
O. N. Prudnikov, V. I. Yudin, R. Ya. Ilenkov, A. V. Taichenachev
https://arxiv.org/abs/2603.03653 https://…

Stationary axisymmetric systems that allow for a separability structure
Hyeong-Chan Kim, Wonwoo Lee
https://arxiv.org/abs/2603.04047 https://arxiv.org/pdf/…

edit_wikinews: Wikipedia news edits (2010)
Two bipartite user-page networks extracted from Wikipedia, about news events. A user connects to a page if that user edited that page. Edits (edges) are timestamped. Edge weights represent counts of the number of edits.
This network has 124174 nodes and 3129705 edges.
Tags: Informational, Web graph, Multigraph, Timestamps
https://networks.skewed.de/net/edit_wikinews#sr
Ridiculogram:

[2026-03-05 Thu (UTC), 3 new articles found for physics.atom-ph Atomic Physics]
toXiv_bot_toot

[2026-04-03 Fri (UTC), 3 new articles found for econ.TH Theoretical Economics]
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Observational Constraints on the Structure-Induced Dark Energy Model
A. Kaz{\i}m \c{C}aml{\i}bel
https://arxiv.org/abs/2603.03999 https://arxiv.org/pdf/260…

[2026-05-04 Mon (UTC), no new articles found for physics.atom-ph Atomic Physics]
toXiv_bot_toot

Meta quietly rolled out USDC stablecoin payouts on Solana and Polygon for select creators in Colombia and the Philippines (Fortune)
https://fortune.com/2026/04/29/meta-stablecoins-crypto-usdc-polygon-solana/

Meta quietly rolls out stablecoin payments four years after demise of controversial Libra project
Creators can receive payouts in the stablecoin USDC on the Solana and Polygon blockchains, according to a new page on Meta’s website.

ich mag es ja sehr, wenn sich #sprachwissenschaft mit lebensnahen themen beschäftigt. grad lag in unserer germanistik-bibliothek ein auch #openaccess erschienener band zur diskursmorphologie auf meinem schreibtisch, in dem es auch was zur

Computing Topological Transition Sets for Line-Line-Circle Trisectors in $R^3$
Eunku Park
https://arxiv.org/abs/2603.29540 https://arxiv.org/pdf/2603.29540…

An $\Omega ( (\log n / \log \log n)^2 )$ Cell-Probe Lower Bound for Dynamic Boolean Data Structures
Young Kun Ko
https://arxiv.org/abs/2603.25914 https://a…

Lorentzian-Euclidean singularity-free solutions to gravitational collapse
Sune Rastad Bahn, Michael Cramer Andersen
https://arxiv.org/abs/2603.03934 https://

Axion-mediated electron-electron interaction in RaOCH_3 molecule
Anna Zakharova, Mikhail Reiter
https://arxiv.org/abs/2605.02833 https://arxiv.org/pdf/2605…

Local observers in stationary axisymmetric dust spacetimes
Matteo Fontana, Sergio Luigi Cacciatori, Roberto Peron
https://arxiv.org/abs/2603.03924 https://…

ALMA Band 2 line survey of a $z = 3.44$ clumpy strongly-lensed submillimetre galaxy
Tom J. L. C. Bakx
https://arxiv.org/abs/2604.01089 https://arxiv.org/pd…

A delay-programmable two-color femtosecond source for multiphoton ionization studies based on chirped-seed NOPA
Kyle Foster, Shruti Majumdar, Mason Toombs, Harshit Agarwal, Daniel Fischer
https://arxiv.org/abs/2605.02749

Scalar quasinormal modes of rotating black holes in parity-violating gravity
Hiroaki W. H. Tahara, Hayato Motohashi, Kazufumi Takahashi, Vicharit Yingcharoenrat
https://arxiv.org/abs/2603.03722

An analytical model of Disequilibrium and decentralized productive Exploration
Nazaria Solferino
https://arxiv.org/abs/2604.00718 https://arxiv.org/pdf/260…

Isotopic effect on collisional widths and shifts of Hg clock transition induced by cold Rb atoms
Renu Bala, Adam Linek, Marcin Witkowski, Piotr S. {\.Z}uchowski, Micha{\l} Zawada, Paul S. Julienne, Roman Ciury{\l}o
https://arxiv.org/abs/2605.01908

Photon Spheres and shadow of Schwarzschild black hole on the EUP framework
Hai-Long Zhen, Jian-Hua Shi, Huai-Fan Li, Yu-Bo Ma
https://arxiv.org/abs/2603.03660 https://

[2026-04-01 Wed (UTC), 2 new articles found for cs.CG Computational Geometry]
toXiv_bot_toot

Separation of even-even from even-odd isotopes using ultrafast lasers
Jacob Levitt
https://arxiv.org/abs/2605.00959 https://arxiv.org/pdf/2605.00959…

Analogue Hawking radiation in nonlinear quantum optics
Isaac Bernal (ESFM-IPN), Miguel A. Cort\'es-Ortiz (Cinvestav), David Bermudez (Cinvestav)
https://arxiv.org/abs/2603.03525

[2026-05-05 Tue (UTC), 4 new articles found for physics.atom-ph Atomic Physics]
toXiv_bot_toot

Accelerating Bertotti-Robinson Black Holes in a Uniform Magnetic Field
Ahmad Al-Badawi, Faizuddin Ahmed, Edilberto O. Silva
https://arxiv.org/abs/2603.03494 https://

Slowly rotating charged BTZ black hole solutions in Palatini Chern-Simons gravity
Flavio Bombacigno, Gonzalo J. Olmo, Emanuele Orazi, Paulo J. Porf\'irio
https://arxiv.org/abs/2603.03436

Replaced article(s) found for econ.TH. https://arxiv.org/list/econ.TH/new
[1/1]:
- Human Misperception of Generative-AI Alignment: A Laboratory Experiment
Kevin He, Ran Shorrer, Mengjia Xia

The effects of non Bunch-Davies initial conditions on gravitationally produced relics
Enrico Bertuzzo, Gabriel M. Salla, Andrea Tesi
https://arxiv.org/abs/2603.03430 https://

Lower bound on the radii of black-hole shadows
Shahar Hod
https://arxiv.org/abs/2603.03421 https://arxiv.org/pdf/2603.03421

Crosslisted article(s) found for econ.TH. https://arxiv.org/list/econ.TH/new
[1/1]:
- Free Information Disrupts Even Bayesian Crowds
Jonas Stein, Shannon Cruz, Davide Grossi, Martina Testori

Lower-dimensional Gauss-Bonnet gravity black holes with quintessence
G. Alencar, T. M. Crispim, J. Macedo, C. R. Muniz
https://arxiv.org/abs/2603.03408 https://

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

Bridging Distant Ideas: the Impact of AI on R&D and Recombinant Innovation
Emanuele Bazzichi, Massimo Riccaboni, Fulvio Castellacci
https://arxiv.org/abs/2604.02189 https://arxiv.org/pdf/2604.02189 https://arxiv.org/html/2604.02189
arXiv:2604.02189v1 Announce Type: new
Abstract: We study how artificial intelligence (AI) affects firms' incentives to pursue incremental versus radical knowledge recombinations. We develop a model of recombinant innovation embedded in a Schumpeterian quality-ladder framework, in which innovation arises from recombining ideas across varying distances in a knowledge space. R&D consists of multiple tasks, a fraction of which can be performed by AI. AI facilitates access to distant knowledge domains, but at the same time it also increases the aggregate rate of creative destruction, shortening the monopoly duration that rewards radical innovations. Moreover, excessive reliance on AI may reduce the originality of research and lead to duplication of research efforts. We obtain three main results. First, higher AI productivity encourages more distant recombinations, if the direct facilitation effect is stronger than the indirect effect due to intensified competition from rivals. Second, the effect of increasing the share of AI-automated R&D tasks is non-monotonic: firms initially target more radical innovations, but beyond a threshold of human-AI complementarity, they shift the focus toward incremental innovations. Third, in the limiting case of full automation, the model predicts that optimal recombination distance collapses to zero, suggesting that fully AI-driven research would undermine the very knowledge creation that it seeks to accelerate.
toXiv_bot_toot

[2026-04-03 Fri (UTC), 2 new articles found for physics.atom-ph Atomic Physics]
toXiv_bot_toot

All Substitution Is Local
Nidhish Shah, Shaurjya Mandal, Asfandyar Azhar
https://arxiv.org/abs/2604.01443 https://arxiv.org/pdf/2604.01443 https://arxiv.org/html/2604.01443
arXiv:2604.01443v1 Announce Type: new
Abstract: When does consulting one information source raise the value of another, and when does it diminish it? We study this question for Bayesian decision-makers facing finite actions. The interaction decomposes into two opposing forces: a complement force, measuring how one source moves beliefs to where the other becomes more useful, and a substitute force, measuring how much the current decision is resolved. Their balance obeys a localization principle: substitution requires an observation to cross a decision boundary, though crossing alone does not guarantee it. Whenever posteriors remain inside the current decision region, the substitute force vanishes, and sources are guaranteed to complement each other, even when one source cannot, on its own, change the decision. The results hold for arbitrarily correlated sources and are formalized in Lean 4. Substitution is confined to the thin boundaries where decisions change. Everywhere else, information cooperates. Code and proofs: https://github.com/nidhishs/all-substitution-is-local.
toXiv_bot_toot

What aggregation rules can be classified as logical concepts?
Nikolay L. Poliakov
https://arxiv.org/abs/2604.01260 https://arxiv.org/pdf/2604.01260 https://arxiv.org/html/2604.01260
arXiv:2604.01260v1 Announce Type: new
Abstract: In this paper, we study aggregation rules with nontrivial symmetric classes of invariant sets (restricted domains), assuming that they, unlike others, have a logical nature. In the simplest case, we provide a complete classification of such rules. Our primary tools are methods of universal algebra and the theory of closed classes of discrete functions.
toXiv_bot_toot

[2026-04-03 Fri (UTC), 3 new articles found for econ.TH Theoretical Economics]
toXiv_bot_toot

Demonstration of a Spherical Penning Trap for Single Electrons
Zirui Fang, Xing Fan
https://arxiv.org/abs/2606.03639 https://arxiv.org/pdf/2606.03639

Sensitivity Enhancement of S-Band Rydberg Atom Microwave Receiver Using Resonant Cavity
Yipeng Xie, Xinbing Chen, Mingwei Lei, Meng Shi
https://arxiv.org/abs/2606.02669 https://…

Screening Workers with Affirmative Action
Charles Po-Cheng Huang
https://arxiv.org/abs/2604.00615 https://arxiv.org/pdf/2604.00615

[2026-06-03 Wed (UTC), 3 new articles found for physics.atom-ph Atomic Physics]
toXiv_bot_toot

Solving Problems of Unknown Difficulty
Nicholas Wu
https://arxiv.org/abs/2604.00156 https://arxiv.org/pdf/2604.00156

[2026-04-02 Thu (UTC), 3 new articles found for econ.TH Theoretical Economics]
toXiv_bot_toot

Low frequency electric field sensing with a Rydberg beam
Jeremy Glick, John R Dickson, Josie Wood, Paul Kunz
https://arxiv.org/abs/2604.01513 https://arxiv…

An analytical model of Disequilibrium and decentralized productive Exploration
Nazaria Solferino
https://arxiv.org/abs/2604.00718 https://arxiv.org/pdf/2604.00718 https://arxiv.org/html/2604.00718
arXiv:2604.00718v1 Announce Type: new
Abstract: This paper studies the economic role of persistent dispersion in allocations across agents. We develop a tractable model in which firms allocate resources under imperfect information and behavioral updating, generating sustained heterogeneity in beliefs and actions. While dispersion induces static misallocation, it also fosters decentralized experimentation, allowing the economy to explore a broader set of productive opportunities. We show that the economy converges to a stationary equilibrium with strictly positive dispersion and that, under plausible conditions, such disequilibrium can dominate the perfectly coordinated benchmark. The model provides a novel interpretation of observed dispersion in productivity and returns as reflecting both inefficiency and productive exploration. It also yields testable predictions linking dispersion to growth and innovation dynamics.
toXiv_bot_toot

Non-destructive cavity readout of molecules for precision measurements
Alejandro Salas-Estrada, Silviu-Marian Udrescu, Geoffrey Zheng, Qian Wang, Arian Jadbabaie, Vladan Vuleti\'c, David DeMille, Ronald F. Garcia Ruiz, Edwin Pedrozo-Pe\~nafiel
https://arxiv.org/abs/2606.01743

A tunable feedback-controlled magnetic trap for a magnet in free fall
Changhao Xu, Alexander Heidt, Mohammadreza Nematollahi, Christoph Lotz, Ernst Maria Rasel, Yan Liu, Wei Ji, Dmitry Budker
https://arxiv.org/abs/2606.01056

Theory for the Rydberg states of helium: quantum defect extensions and comparison with experiment up to $n = 102$ for the singlet and triplet $P$-states
G. W. F. Drake, Aaron T. Bondy
https://arxiv.org/abs/2606.00814

Experimental observation of strong field stabilization
Anna R. Dardia, Spencer Walker, Yifei Bai, Petros Kousis, Alexandra S. Landsman, David M. Weld
https://arxiv.org/abs/2606.00242

[2026-06-02 Tue (UTC), 7 new articles found for physics.atom-ph Atomic Physics]
toXiv_bot_toot

Industrial Policy with Network Externalities: Race to the Bottom vs. Win-Win Outcome
Nigar Hashimzade, Haoran Sun
https://arxiv.org/abs/2603.29542 https://…

A Mid-Infrared Platform Based on Strontium Tweezer Arrays
Aaron Holman, Ximo Sun, Bojeong Seo, Joshua Corn, Zezheng Zhu, Yuan Xu, Jiahao Wu, Nanfang Yu, Dmytro Filin, Marianna Safronova, Sebastian Will
https://arxiv.org/abs/2606.02560

Stern-Gerlach interferometry in three dimensions: the role of transverse fields
D. Meng, D. Z. Chan, J. D. D. Martin
https://arxiv.org/abs/2604.00807 https://

[2026-04-01 Wed (UTC), 1 new article found for econ.TH Theoretical Economics]
toXiv_bot_toot

Probing topological edge states in a molecular synthetic dimension
Adarsh P. Raghuram, Francesca M. Blondell, Jonathan M. Mortlock, Benjamin P. Maddox, Sohail Dasgupta, Holly A. J. Middleton-Spencer, Kaden R. A. Hazzard, Hannah M. Price, Philip D. Gregory, Simon L. Cornish
https://arxiv.org/abs/2604.00745

[2026-04-02 Thu (UTC), 3 new articles found for physics.atom-ph Atomic Physics]
toXiv_bot_toot

Replaced article(s) found for econ.TH. https://arxiv.org/list/econ.TH/new
[1/1]:
- Distance Functions and Generalized Means: Duality and Taxonomy
Walter Briec
h…

Screening Workers with Affirmative Action
Charles Po-Cheng Huang
https://arxiv.org/abs/2604.00615 https://arxiv.org/pdf/2604.00615 https://arxiv.org/html/2604.00615
arXiv:2604.00615v1 Announce Type: new
Abstract: This paper examines the optimal contracts in a two-dimensional screening model where one dimension(group identity) is verifiable by agents but not falsifiable. A principal offers contracts to agents who differ in cost types and group membership. Motivated by the United States Federal policy, Work Opportunity Tax Credit, the principal receives tax benefits for hiring agents from protected groups. Under the assumption that the protected agents tend to have higher cost types, the optimal contract induces full separation across both dimensions: agents reveal the cost type and the group identity through contract choice. Furthermore, the principal is willing to hire the trait agents with a higher cost threshold than the non-trait agents, and this threshold increases with the tax credit. Conversely, when the protected agents tend to have lower cost types, the optimal design without tax credits pools groups while separating by cost type. These results demonstrate that both affirmative action and non-discrimination can be optimal depending on the cost distribution ordering across groups.
toXiv_bot_toot

Solving Problems of Unknown Difficulty
Nicholas Wu
https://arxiv.org/abs/2604.00156 https://arxiv.org/pdf/2604.00156 https://arxiv.org/html/2604.00156
arXiv:2604.00156v1 Announce Type: new
Abstract: This paper studies how uncertainty about problem difficulty shapes problem-solving strategies. I develop a dynamic model where an agent solves a problem by brainstorming approaches of unknown quality and allocating a fixed effort budget among them. Success arrives from spending effort pursuing good approaches, at a rate determined by the unknown problem difficulty. The agent balances costly exploration (expanding the set of approaches) with exploitation (pursuing existing approaches). Failures could signal either a bad idea or a hard problem, and this uncertainty generates novel dynamics: optimal search alternates between trying new approaches and revisiting previously abandoned ones. I then examine a principal-agent environment, where moral hazard arises on the intensive margin: how the agent explores. Dynamic commitment leads contracts to frontload incentives, which can be counteracted by the presence of learning. The framework reflects scientific discovery, product development, and other creative work, providing insights into innovation and organizational design.
toXiv_bot_toot

[2026-04-02 Thu (UTC), 3 new articles found for econ.TH Theoretical Economics]
toXiv_bot_toot

Replaced article(s) found for physics.atom-ph. https://arxiv.org/list/physics.atom-ph/new
[1/1]:
- Observation of Phase Doubling and Entanglement in Coherent Matter-Wave Reactions
Shu Nagata, Tadej Meznarsic, Chuixin Kong, Cheng Chin

Crosslisted article(s) found for physics.atom-ph. https://arxiv.org/list/physics.atom-ph/new
[1/1]:
- Optical Memory Optimization Across Rubidium Isotopes and Transitions
T. Danielov, I. Pulji\'c, M. {\DJ}uji\'c, D. Aumiler, N. \v{S}anti\'c, T. Ban

Suppression of differential light shifts in ground and metastable trapped-ion qubits
Drew Parks, Thomas Dellaert, Patrick McMillin, Conrad Roman, Andrei Derevianko, Wesley C. Campbell
https://arxiv.org/abs/2606.02543

Creating and Probing Spin-Squeezed States of Molecules
Connor M. Holland, Callum L. Welsh, Yukai Lu, David Wellnitz, Xing-Yan Chen, Ana Maria Rey, Lawrence W. Cheuk
https://arxiv.org/abs/2606.02500

Replaced article(s) found for physics.atom-ph. https://arxiv.org/list/physics.atom-ph/new
[1/1]:
- QED vacuum polarization in the Coulomb field of a nucleus: a method of high-order calculation
Sergey Volkov

Extending the fundamental limit of atomic clock stability
Ravid Shaniv, Ayush Agrawal, David B. Hume
https://arxiv.org/abs/2604.01099 https://arxiv.org/pdf…

[2026-06-01 Mon (UTC), no new articles found for physics.atom-ph Atomic Physics]
toXiv_bot_toot