Quantum model finds a common limit for locating brief changes
Preprint: A mathematical analysis says a square-root measurement can match the best collective strategy for pinpointing one temporary change as sequences grow.
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Preprint shows how to round secretary-problem cutoffs exactly
A second-order correction narrows the choice to two neighboring integers in several single-threshold models, while an error band leaves some cases unresolved.
Study finds random averages can reveal hidden weight rules
Preprint: A theoretical analysis says nondegenerate limits can force regular tails and power-sum behavior across several probability models.
Algorithms Decide Membership in Finite-Base Wreath Products
A preprint presents a standard-basis method and nested-membership algorithm for finite base groups in every natural-number dimension.
Modified-gravity model fits cosmic expansion, but results vary
Preprint analysis finds the square-root exponential model favored by some supernova compilations, while a power-law model stays close to flat ΛCDM.
New AI training method shows higher average scores on math tests
Preprint: OPDVR combines teacher guidance with verifier feedback; its average scores were higher in two settings, but not on every benchmark.
Kernel ensemble matches or beats baselines while cutting computation
Preprint: KENDO led most benchmark comparisons in optimization and active learning, but its kernel menu still must be specified by hand.
Targeted neuron tests flag sharp drops in LLM code scores
Preprint: A gradient-free scoring method selected small sets of language-model neurons for suppression tests, where code and math scores fell more than scores on other benchmarks.
Preprint tightens a key finite-scale test of Weil positivity
A version-2 arXiv study certifies positivity at support 1.6 and finds upper bounds that fit a proposed Landau–Widom decay law, while leaving the main asymptotic claim unproved.
Product-form centers and linear codes match the optimal covering rate
Preprint: A theoretical study finds that product-form centers and linearity preserve the asymptotic rate, but explicit codes reaching it remain an open problem.
Models link magma chemistry to starkly different sub-Neptune atmospheres
Preprint models connect interior composition with contrasting gases, radii and synthetic spectra, while stressing major thermochemical uncertainties.
A Venus Moon Could Have Vanished Through Tides Alone, Model Finds
Preprint: A numerical study reports a narrow survival window that changes with Venus’s initial spin, satellite mass and tidal model.
AI Router Balances LLM Quality and Cost Across Four Tests
An arXiv version 2 preprint dated 30 Aug 2026 reports benchmark results from a system that changes model choices as a workflow unfolds.
Instruction-tuned AI leads on a Sanskrit glossary benchmark
Preprint: Fine-tuned systems beat prompting and alignment baselines, but phrase segmentation and word order remain major challenges.
Endpoint regularity is proved with uniform source control
Preprint: The theorem covers superquadratic Hamilton-Jacobi equations and shows bounded source norms alone are not enough.
Graphene device links resistance peak to magnetic history
Preprint: Low-temperature measurements on a single device found transport states that varied with gate-voltage path and in-plane field.
Mobility model improves predictions across four disease groups
Preprint: DeMMO delivered the strongest held-out predictions across five clinical outcomes, while its mobility markers and disability thresholds still need clinical validation.
Twisted graphene shows current-dependent resistance signatures
A preprint reports a current-activated resistance peak and field-shifting resonances in a 1.29° graphene stack.
Battery-free sensor system reaches every first rendezvous in tests
Preprint analysis reports complete first contacts and faster sustained exchanges for MagPie, but says controlled tests do not establish field-scale energy efficiency or multi-hop performance.
Chinese search correction system reports fewer misspellings
Preprint: GUIDE combines phonetic and visual clues to correct short Chinese queries, with tests on benchmarks and production search traffic.