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CLUSTER: Derivative-free optimization of smooth functions with parameter-change costs

Speeding up lab experiments when moving between settings costs time and money

A new algorithm called CLUSTER optimizes laboratory experiments about 50% faster than existing methods when there's a penalty for adjusting each parameter or group of parameters—such as when a robot must physically reposition equipment. The approach works especially well for real-world lab setups like optics experiments, and outperforms popular alternatives like Bayesian optimization.

Robot-controlled labs waste time and resources repositioning equipment between every tiny parameter adjustment. CLUSTER reduces this waste by being smarter about which parameters to change together, cutting experiment time significantly. For labs running hundreds of optimization experiments—from drug discovery to materials science—this 50% speedup translates directly to faster results and lower costs.

Multi-LCB: Extending LiveCodeBench to Multiple Programming Languages

Testing whether AI coding assistants work equally well in twelve languages, not just Python

Researchers expanded a major AI coding benchmark from Python alone to twelve programming languages, revealing that large language models perform significantly worse in non-Python languages even on identical tasks. The evaluation of 24 models uncovered clear evidence that AI systems are overtrained on Python and struggle with language-specific code patterns.

Most programming benchmarks only test AI in Python, so companies have no reliable way to know whether these tools will work for their JavaScript, Java, C++, or Go codebases. This benchmark exposes real performance gaps that developers will encounter in practice, pushing AI model builders to create systems that actually generalize across the languages used in professional software development.

Sovereign Execution Brokers: Enforcing Certificate-Bound Authority in Agentic Control Planes

A security checkpoint that stops AI agents from making unauthorized changes to cloud systems

Autonomous agents controlling cloud infrastructure need a hard stop between decision and action. This paper introduces the Sovereign Execution Broker, a system that sits between an AI agent's proposed changes and the actual infrastructure, verifying that each change matches what was explicitly approved and hasn't been revoked—then recording exactly what happened. The authors tested it on AWS and Kubernetes clusters and found it adds minimal latency while catching unauthorized mutations.

As AI agents gain direct control over production systems, a single compromised or hallucinating agent could cause widespread damage before anyone notices. This broker creates a tamper-proof record and a mandatory verification point that can't be bypassed, letting companies revoke agent permissions instantly and audit every change. In regulated industries like finance and healthcare, having a signed, auditable trail of who authorized what change and when could be legally required.

Analysing drivers and interdependencies in European electricity markets using XAI

What actually drives electricity prices across Europe's interconnected power grid

Researchers used artificial intelligence to decode why electricity prices fluctuate across 39 European regions, revealing that solar power influences prices far more than its overall share of power generation would suggest. Gas prices remain the most consistent driver, and direct connections between countries' grids significantly reshape pricing in neighboring nations—showing how tightly Europe's electricity systems are now linked.

European governments and grid operators make billion-euro decisions about energy policy, transmission upgrades, and emergency reserves based on price forecasts. Understanding which factors actually move prices—rather than just predicting them—lets policymakers target the right levers: they might invest differently in solar storage if solar truly dominates price swings, or prioritize grid upgrades between countries if interconnections reshape regional economics. This analysis also shows what a genuinely unified European market would look like, crucial information as the EU pushes toward deeper energy integration.

Mechanism-Guided Selective Unlearning for RLVR-Induced Reasoning

Forgetting specific skills in AI without breaking everything else

Researchers developed MAST, a technique that selectively removes unwanted reasoning patterns from AI models while preserving their useful abilities. On math-focused AI models, MAST successfully made the system forget targeted skills (reducing correct answers on a test set from 45 to 37 out of 150) while keeping other math knowledge intact—something that completely failed when researchers tried to erase the same patterns from the whole model at once.

AI systems sometimes develop reasoning shortcuts or behaviors their creators want to remove. Current methods for erasing these unwanted patterns often damage the model's general abilities, making it worse overall. MAST offers a surgical alternative that could let companies fix problematic AI behavior without rebuilding or retraining from scratch—potentially saving time and computational cost while making AI systems safer and more reliable.

Sequential Kernel-based Conditional Independence Testing via Adaptive Betting

A more reliable way to test when two things are truly independent

Researchers developed a new statistical test that can reliably detect when two variables are independent of each other, even when the underlying assumptions are slightly wrong. The method combines adaptive betting with a kernel-based statistic and a new calibration strategy, reducing false alarms by up to 70% compared to existing approaches while maintaining the ability to find real patterns in both simulated and real-world fairness datasets.

Conditional independence testing underpins decisions in machine learning, fairness auditing, and causal inference. When these tests give false positives—declaring variables independent when they're not—they can lead to flawed models and unfair automated decisions. This method works reliably even when the assumed model has small errors, which is almost always the case in practice, making it directly usable in real applications rather than just theoretical settings.

Structure Over Nonlinearity: Explicit Interaction Architectures for Dynamical Learning

Building better AI for moving systems by designing smart structure instead of complex math

A new approach to machine learning for dynamical systems—things that change over time—achieves better performance by carefully organizing how information flows through a model rather than relying on complicated mathematical functions. The structured design also eliminates computational bottlenecks and creates useful patterns automatically, even when parameters aren't heavily optimized.

Many real-world systems—from robotic arms to chemical reactions to weather patterns—require models that evolve over time. Current AI methods demand enormous complexity and computational power to capture these dynamics. This work shows simpler, faster models can work better by borrowing principles from how waves propagate, making it cheaper and more practical to build AI systems for engineering and scientific applications.

Native Active Perception as Reasoning for Omni-Modal Understanding

Teaching AI to watch videos strategically instead of frame by frame

Researchers built an AI agent that watches videos intelligently—pausing to think, asking strategic questions, and taking notes—rather than processing every frame uniformly. The system, called OmniAgent, actually performs better with more reasoning time, and a smaller 7-billion-parameter version outperformed a model 10 times larger on standard video-understanding benchmarks.

Video understanding systems today waste computation by treating every frame equally, whether answering simple or complex questions. This approach cuts unnecessary processing while improving accuracy, which could make video search and analysis faster and cheaper at scale. The finding that reasoning time improves performance also suggests a path toward more efficient AI systems that think strategically rather than brute-force their way through problems.

Correlation emergence and the Epps effect in two coupled limit order books

Why stock correlations look stronger when you zoom out

When two stock markets trade together through connected orders, their price movements appear more correlated when measured over longer time periods—a phenomenon called the Epps effect. This study shows the effect emerges from three causes: traders using different clocks to react, delays in how coupling between markets responds, and the combination of both. The researchers derived mathematical formulas that predict correlation strength based on how you measure it.

Investors and regulators use price correlations to assess portfolio risk and market stability. If correlations shift depending on whether you look at second-by-second trades or daily data, it changes how much risk you think you're taking. Understanding what creates these shifts makes it possible to build more accurate risk models and detect when trading patterns signal real market stress versus technical measurement artifacts.

MetaboNet-Bench: A Multi-modal Benchmark for Glucose Forecasting in Type 1 Diabetes

A shared testing ground for algorithms that predict blood sugar in type 1 diabetes

Researchers created MetaboNet-Bench, a standardized evaluation framework for glucose forecasting algorithms that use multiple data sources—glucose monitors, insulin doses, and carbohydrate intake—rather than glucose readings alone. When they tested several published models, they found that adding more types of data only improved predictions in more sophisticated models, revealing that simpler algorithms can't fully exploit the extra information.

Type 1 diabetes patients rely on accurate glucose forecasts to manage their insulin delivery and prevent dangerous blood sugar swings. Until now, researchers have compared forecasting algorithms using different datasets and methods, making it impossible to tell which approaches actually work best. MetaboNet-Bench gives the research community a shared standard, enabling faster innovation and clearer identification of which data sources matter most for better predictions.

Sign-Rank, Index, and List Replicability: Connections and Separations

New tools for measuring how hard it is to learn complex patterns

Researchers discovered how three different measures of pattern complexity relate to each other, proving that two newer measures called the Z₂-index and list replicability can help estimate sign rank—a notoriously hard-to-calculate measure in machine learning. By connecting these measures and studying list replicability more deeply, the team resolved an open question about when sign rank and the Z₂-index diverge.

Sign rank is a fundamental concept in learning theory, but computing it directly is so difficult that researchers often can't determine whether certain problems are inherently hard to learn. These new connections give machine learning theorists practical tools to prove lower bounds on sign rank without calculating it directly, potentially accelerating progress on long-standing open problems in computational learning.

Optimal Calibration of Quantum Network Links

Finding the sweet spot between quantum link quality and how often they need repairs

Quantum networks face a fundamental trade-off: the longer you run a quantum link without maintenance, the more its signal quality degrades, but pausing to recalibrate takes the link offline entirely. Researchers developed a mathematical protocol that automatically decides how long each link should operate before recalibrating, balancing quality against availability to meet a network's performance needs.

Quantum networks promise unprecedented security and computing power, but they only work if their links stay reliable. This optimization directly determines how much usable bandwidth a quantum network actually delivers—get the calibration timing wrong, and you either waste time on repairs or send corrupted data. The protocol works for both simple chains and complex networks where multiple paths share links, making it practical for real quantum infrastructure.