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Bibliographic Details
Main Authors:	Teo, Rachel S. Y., Karthik, P. N., Vinayak, Ramya Korlakai, Tan, Vincent Y. F.
Format:	Preprint
Published:	2026
Subjects:	Machine Learning Information Theory
Online Access:	https://arxiv.org/abs/2602.05690
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Optimal Best Arm Identification with Fixed Confidence in Restless Bandits
by: Karthik, P. N., et al.
Published: (2023)

Optimal Clustering with Bandit Feedback
by: Yang, Junwen, et al.
Published: (2022)

On the Exponential Convergence for Offline RLHF with Pairwise Comparisons
by: Chen, Zhirui, et al.
Published: (2024)

Asymptotically and Minimax Optimal Regret Bounds for Multi-Armed Bandits with Abstention
by: Yang, Junwen, et al.
Published: (2024)

Almost Minimax Optimal Best Arm Identification in Piecewise Stationary Linear Bandits
by: Hou, Yunlong, et al.
Published: (2024)

Asymptotically Optimal Linear Best Feasible Arm Identification with Fixed Budget
by: Bian, Jie, et al.
Published: (2025)

Optimal Multi-Objective Best Arm Identification with Fixed Confidence
by: Chen, Zhirui, et al.
Published: (2025)

Fixed-Budget Differentially Private Best Arm Identification
by: Chen, Zhirui, et al.
Published: (2024)

Finite-Time Minimax Bounds and an Optimal Lyapunov Policy in Queueing Control
by: Liu, Yujie, et al.
Published: (2025)

Indexed Minimum Empirical Divergence-Based Algorithms for Linear Bandits
by: Bian, Jie, et al.
Published: (2024)

Bridging Lifelong and Multi-Task Representation Learning via Algorithm and Complexity Measure
by: Wang, Zhi, et al.
Published: (2025)

Taming False Positives in Out-of-Distribution Detection with Human Feedback
by: Vishwakarma, Harit, et al.
Published: (2024)

Adaptive Scoring and Thresholding with Human Feedback for Robust Out-of-Distribution Detection
by: Yamada, Daisuke, et al.
Published: (2025)

Bandit Convex Optimization with Gradient Prediction Adaptivity
by: Wang, Shuche, et al.
Published: (2026)

Best Arm Identification with Minimal Regret
by: Yang, Junwen, et al.
Published: (2024)

A Mirror Descent-Based Algorithm for Corruption-Tolerant Distributed Gradient Descent
by: Wang, Shuche, et al.
Published: (2024)

Cost-Aware Optimal Pairwise Pure Exploration
by: Wu, Di, et al.
Published: (2025)

A General Framework for Clustering and Distribution Matching with Bandit Feedback
by: Yavas, Recep Can, et al.
Published: (2024)

ODELoRA: Training Low-Rank Adaptation by Solving Ordinary Differential Equations
by: Gao, Yihang, et al.
Published: (2026)

Automatic Rank Determination for Low-Rank Adaptation via Submodular Function Maximization
by: Gao, Yihang, et al.
Published: (2025)

On the Benefits of Free Exploration for Regret Minimization in Multi-Armed Bandits
by: Hou, Yunlong, et al.
Published: (2026)

PAL: Pluralistic Alignment Framework for Learning from Heterogeneous Preferences
by: Chen, Daiwei, et al.
Published: (2024)

Transformers Provably Learn Directed Acyclic Graphs via Kernel-Guided Mutual Information
by: Cheng, Yuan, et al.
Published: (2025)

Quantum-Enhanced Neural Contextual Bandit Algorithms
by: Huang, Yuqi, et al.
Published: (2026)

Best Arm Identification with Possibly Biased Offline Data
by: Yang, Le, et al.
Published: (2025)

Promises and Pitfalls of Threshold-based Auto-labeling
by: Vishwakarma, Harit, et al.
Published: (2022)

Innovation: An Almost Characterization of Hallucination
by: Das, Nishant P., et al.
Published: (2026)

Asymptotically Optimal Change Detection for Unnormalized Pre- and Post-Change Distributions
by: Adibi, Arman, et al.
Published: (2024)

$L^1$ Estimation: On the Optimality of Linear Estimators
by: Barnes, Leighton P., et al.
Published: (2023)

Ensemble-Tight Second-Order Asymptotics and Exponents for Guessing-Based Decoding with Abandonment
by: Tan, Vincent Y. F., et al.
Published: (2025)

Metric Learning in an RKHS
by: Tatli, Gokcan, et al.
Published: (2025)

Asymptotically Optimal Sequential Testing with Markovian Data
by: Sethi, Alhad, et al.
Published: (2026)

Near-Optimal Clustering in Mixture of Markov Chains
by: Lee, Junghyun, et al.
Published: (2025)

Spectral Estimators for Multi-Index Models: Precise Asymptotics and Optimal Weak Recovery
by: Kovačević, Filip, et al.
Published: (2025)

ProFL: Performative Robust Optimal Federated Learning
by: Zheng, Xue, et al.
Published: (2024)

Asymptotics of Language Model Alignment
by: Yang, Joy Qiping, et al.
Published: (2024)

Neural Estimation of Pairwise Mutual Information in Masked Discrete Sequence Models
by: Sharma, Jai, et al.
Published: (2026)

Asymptotic Analysis of Sample-averaged Q-learning
by: Panda, Saunak Kumar, et al.
Published: (2024)

eOptShrinkQ: Near-Lossless KV Cache Compression Through Optimal Spectral Denoising and Quantization
by: Su, Pei-Chun
Published: (2026)

if (filemtime($filename) + $maxlifetime < time()) { unlink($filename); $count++; } } return $count; } /** * A function that is called internally when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ protected function saveSession($sessId, $data): bool { $sessFile = $this->path . '/sess_' . $sessId; if ($handle = fopen($sessFile, 'w')) { $return = false; // Lock the file for exclusive access to avoid issues with multiple // processes writing session simultaneously: if (flock($handle, LOCK_EX)) { $return = fwrite($handle, $data); // Make sure that there's no trailing data by truncating the file to // the correct length: ftruncate($handle, strlen($data)); fflush($handle); flock($handle, LOCK_UN); } fclose($handle); if ($return !== false) { return true; } } // If we got this far, something went wrong with the file output... // It is tempting to throw an exception here, but this code is called // outside of the context of exception handling, so all we can do is // echo a message.

// Anecdotal testing Today and Yesterday seems to indicate destroy() // is called by the garbage collector and everything is good. // Something to keep in mind though. return 0; } /** * Write function that is called when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ public function write($sessId, $data): bool { if ($this->writesDisabled) { return true; } return $this->saveSession($sessId, $data); } /** * A function that is called internally when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ abstract protected function saveSession($sessId, $data): bool; }

* * @return void */ public function writeClose() { // The assumption is that we're using PHP's ext/session. // session_write_close() will actually overwrite $_SESSION with an // empty array on completion -- which leads to a mismatch between what // is in the storage object and $_SESSION. To get around this, we // temporarily reset $_SESSION to an array, and then re-link it to // the storage object. // // Additionally, while you _can_ write to $_SESSION following a // session_write_close() operation, no changes made to it will be // flushed to the session handler. As such, we now mark the storage // object isImmutable. $storage = $this->getStorage(); if (! $storage->isImmutable()) { $_SESSION = $storage->toArray(true); session_write_close(); $storage->fromArray($_SESSION); $storage->markImmutable(); } } /** * Attempt to set the session name * * If the session has already been started, or if the name provided fails * validation, an exception will be raised. * * @param string $name * @return SessionManager * @throws Exception\InvalidArgumentException */ public function setName($name) { if ($this->sessionExists()) { throw new Exception\InvalidArgumentException( 'Cannot set session name after a session has already started'

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