Open benchmark brings 20 2.5D and 3D chip cases together
Preprint: A 20-design suite spans foundational 2.5D, basic 3D and complex hybrid architectures, using reusable virtual chiplet models.
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New graph theorem sets a threshold for four shared edges
Preprint: For every sufficiently large n, the minimum is 2n−4; a graph with at most 2n−5 edges can be relabelled to share at most three edges.
Claude Opus Leads Preprint Test of AI Bug Discovery
Preprint: Opus 4.8 scored highest among three Claude models, but none triggered a crash in 13 of 77 challenges.
Quantum model gives small clusters a way to exchange electrons
This preprint describes a self-consistent calculation that gives model water, hydrogen and lithium systems constant-potential boundaries, while real interfaces remain untested.
AI Video Sync Scores Disagree on What They Measure
Preprint: An audit of four automatic metrics found different strengths across timing and content disruptions, with no clear all-purpose score.
Preprint reports a loop-size threshold in one Yang-Mills channel
At weak coupling, one calculated channel grows below a critical loop size and decays above it under an exploratory infrared prescription, while the leading-in-colour channel remains unresolved.
Model estimates USD 47 million in savings for pumped-storage project
An arXiv preprint models a 1,000 MW, 12-hour project in Rio de Janeiro and compares an optimized reservoir layout with an initial terrain-based design.
BFN-RL leads Sokoban, categorical diffusion wins BlockedUnlockPickup
Preprint comparison reports higher BFN-RL success on Sokoban and DoorKey, but higher categorical-diffusion success on Empty-Random and BlockedUnlockPickup.
Modified-gravity model predicts weaker cosmic 21-cm absorption
Preprint: A theoretical calculation finds weaker 21-cm absorption than ΛCDM, but it uses a ΛCDM-based spin-temperature input.
Molecules spin past helium’s ‘centrifugal wall’ in new study
Preprint: Molecules in helium nanodroplets spun beyond expected limits, while alignment loss suggested different thermalization times.
Preprint: GLAD leads most measures in two industrial benchmarks
The multi-view system restricts cross-view information and is reported as best on nine of 10 Real-IAD measures and all 10 MANTA-Tiny measures.
Preprint tests a pay-for-filtering plan against BGP hijacks
Simulations found broad monitor visibility and concentrated rewards, while leaving the bounty needed for participation and the market equilibrium unresolved.
AI models reveal a shifting geometric signal for grammar
Preprint analysis finds that closed-class word neighborhoods expand and contract earlier than open-class neighborhoods across transformer layers.
Learned controller tracks soft-robot paths in a lab test
Preprint: A data-driven controller followed prescribed and user-guided paths, maintained clearance from a dynamic obstacle and tested local stability on one three-bellows actuator.
A Turbulence Model Tests a New Route to Anomalous Scaling
Preprint: A nonlinear stochastic cascade calculation derives a weak-noise correction to scaling exponents and finds numerical support for the theory.
A geometry iteration is stable near a three-circle target
Preprint: The analysis finds local convergence for a Malfatti configuration, but leaves global behavior unresolved.
Preprint: AI Flags 14,426 Likely Young Stars in APOGEE Data
The model recovered most labeled cool stars, but its performance fell sharply for hotter stars, and the training labels were not definitive ground truth.
Spatial model maps patterns in brain tissue and African vegetation data
A preprint reports a spatial factor method designed to scale with the number of locations, tested on brain tissue and African vegetation data.
New Protocol Links Communication to Differences Between Strings
Preprint: A theorem describes a randomized protocol that uses O(k log^3 n) bits and O(n) time under stated assumptions.
Coding agents moved fast, but the software needed more guardrails
Preprint: A 20-week software project used coding agents at high speed while building a much larger layer of models, checks and controls.