non-stationary

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#non-stationary

Priced Motion Through Optimal Faces: A Normal-Fan Geometry for Non-Stationary Adversarial MDPs

arXiv cs.LG · 2d ago Cached

This paper introduces a normal-fan geometry for finite-horizon adversarial MDPs with fixed transitions, developing a face-crossing price that separates consequential from harmless non-stationarity. It shows that dynamic regret decomposes into intrinsic priced face motion plus within-face selection error.

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#non-stationary

On the Necessity of a Liquid Substrate for Mesh Intelligence

arXiv cs.LG · 2d ago Cached

This paper proves two necessary conditions for optimal inference in a mesh of sovereign agents with irregular, non-stationary observations: an adaptive timescale and gap-dependence, which are satisfied only by liquid (continuous-time) networks.

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#non-stationary

RAVEN: A Regime-Aware Variable-context Expert Network for Financial Time Series Forecasting

arXiv cs.LG · 2026-06-24 Cached

The paper proposes RAVEN, a Mixture-of-Experts framework that adaptively determines temporal context windows for each input sample to handle non-stationary financial time series. It achieves state-of-the-art performance on financial and traffic benchmarks.

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#non-stationary

Catching a Moving Subspace: Low-Rank Bandits Beyond Stationarity

arXiv cs.LG · 2026-05-21 Cached

This paper studies piecewise-stationary low-rank linear contextual bandits, proposes the SPSC algorithm that achieves dynamic regret scaling with the intrinsic rank instead of the ambient dimension, and characterizes the identification boundary for subspace recovery under scalar feedback.

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#non-stationary

TTCD:Transformer Integrated Temporal Causal Discovery from Non-Stationary Time Series Data

arXiv cs.LG · 2026-05-12 Cached

The paper introduces TTCD, a novel framework for temporal causal discovery from non-stationary time series data using transformer-based feature learning and reconstruction-guided signal distillation.

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