:: Library Catalog

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Bibliographische Detailangaben
Hauptverfasser:	Alman, Josh, Andoni, Alexandr, Zhang, Hengjie
Format:	Preprint
Veröffentlicht:	2024
Schlagworte:	Data Structures and Algorithms
Online-Zugang:	https://arxiv.org/abs/2410.22477
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

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A Refined Laser Method and Faster Matrix Multiplication
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Faster exact learning of k-term DNFs with membership and equivalence queries
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Finer-Grained Hardness of Kernel Density Estimation
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Asymptotic Rank Speedup Theorems, Revisited
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Fast RoPE Attention: Combining the Polynomial Method and Fast Fourier Transform
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More Asymmetry Yields Faster Matrix Multiplication
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Faster algorithms for k-Orthogonal Vectors in low dimension
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A Framework for Building Data Structures from Communication Protocols
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On the Maximum Distance Sublattice Problem and Closest Vector Problem
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DNF Learning via Locally Mixing Random Walks
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Nearly Optimal Attention Coresets
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Learning Functions of Halfspaces
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The Fine-Grained Complexity of Gradient Computation for Training Large Language Models
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Algorithms for Computing Closest Points for Segments
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Approximating High-Dimensional Earth Mover's Distance as Fast as Closest Pair
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On Sketching Quadratic Forms
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The Planted Orthogonal Vectors Problem
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Faster All-Pairs Optimal Electric Car Routing
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Simple and Faster Algorithms for Knapsack
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Sampling with a Black Box: Faster Parameterized Approximation Algorithms for Vertex Deletion Problems
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Faster All-Pairs Minimum Cut: Bypassing Exact Max-Flow
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Average sensitivity of the Knapsack Problem
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A Faster Algorithm for Constrained Correlation Clustering
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Faster Algorithm for Structured John Ellipsoid Computation
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Online Orthogonal Vectors Revisited
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Faster Approximation Algorithms for k-Center via Data Reduction
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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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