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Dual encoder models are ubiquitous in modern classification and retrieval. Crucial for training such dual encoders is an accurate estimation of gradients from the partition function of the softmax over the large output space; this requires…

机器学习 · 计算机科学 2023-03-28 Nicholas Monath , Manzil Zaheer , Kelsey Allen , Andrew McCallum

A 2-stab unit interval graph (2SUIG) is an axes-parallel unit square intersection graph where the unit squares intersect either of the two fixed lines parallel to the $X$-axis, distance $1 + \epsilon$ ($0 < \epsilon < 1$) apart. This family…

离散数学 · 计算机科学 2016-04-01 Sujoy Kumar Bhore , Dibyayan Chakraborty , Sandip Das , Sagnik Sen

Searching for a path between two nodes in a graph is one of the most well-studied and fundamental problems in computer science. In numerous domains such as robotics, AI, or biology, practitioners develop search heuristics to accelerate…

机器学习 · 计算机科学 2023-01-12 Michal Pándy , Weikang Qiu , Gabriele Corso , Petar Veličković , Rex Ying , Jure Leskovec , Pietro Liò

Since the introduction of the Hermitian adjacency matrix for digraphs, interest in so-called complex unit gain graphs has surged. In this work, we consider gain graphs whose spectra contain the minimum number of two distinct eigenvalues.…

组合数学 · 数学 2021-05-20 Pepijn Wissing , Edwin R. van Dam

We generalize the natural duality of graphs embedded into a surface to a duality with respect to a subset of edges. The dual graph might be embedded into a different surface. We prove a relation between the signed Bollobas-Riordan…

组合数学 · 数学 2008-12-16 Sergei Chmutov

In 1997 Klav\v{z}ar and Gutman suggested a generalization of the Wiener index to vertex-weighted graphs. We minimize the Wiener index over the set of trees with the given vertex weights' and degrees' sequences and show an optimal tree to be…

组合数学 · 数学 2015-09-23 Mikhail Goubko

We describe an algorithm for comparing two RNA secondary structures coded in the form of trees that introduces two new operations, called node fusion and edge fusion, besides the tree edit operations of deletion, insertion, and relabeling…

数据结构与算法 · 计算机科学 2008-10-23 Julien Allali , Marie-France Sagot

We revisit multipass pairing heaps and path-balanced binary search trees (BSTs), two classical algorithms for data structure maintenance. The pairing heap is a simple and efficient "self-adjusting" heap, introduced in 1986 by Fredman,…

数据结构与算法 · 计算机科学 2018-06-25 Dani Dorfman , Haim Kaplan , László Kozma , Seth Pettie , Uri Zwick

We suggest a generalization of the Feynman path integral to an integral over random surfaces. The proposed action is proportional to the linear size of the random surfaces and is called gonihedric. The convergence and the properties of the…

高能物理 - 理论 · 物理学 2016-12-13 George Savvidy

This paper presents a new framework for anytime heuristic search where the task is to achieve as many goals as possible within the allocated resources. We show the inadequacy of traditional distance-estimation heuristics for tasks of this…

人工智能 · 计算机科学 2015-03-19 D. Davidov , S. Markovitch

Searching on bipartite graphs serves as a fundamental task for various real-world applications, such as recommendation systems, database retrieval, and document querying. Conventional approaches rely on similarity matching in continuous…

信息检索 · 计算机科学 2024-08-20 Yankai Chen , Yixiang Fang , Yifei Zhang , Chenhao Ma , Yang Hong , Irwin King

In this paper, we prove that the self-dual morphological hierarchical structure computed on a n-D gray-level wellcomposed image u by the algorithm of G{\'e}raud et al. [1] is exactly the mathematical structure defined to be the tree of…

离散数学 · 计算机科学 2022-06-13 Thierry GÉraud , Nicolas Boutry , Sébastien Crozet , Edwin Carlinet , Laurent Najman

The doubled formulation of string theory, which is T-duality covariant and enlarges spacetime with extra coordinates conjugate to winding number, is reformulated and its geometric and topological features examined. It is used to formulate…

高能物理 - 理论 · 物理学 2008-11-26 C M Hull

There is an unproven duality theory hypothesizing that random discrete trees and their poissonized embeddings in continuous time share fundamental properties. We give additional evidence in favor of this theory by showing that several…

概率论 · 数学 2019-03-04 Carly Domicolo , Panpan Zhang , Hosam Mahmoud

Extensions of Stone-type dualities have a long history in algebraic logic and have also been instrumental in proving results in algebraic language theory. We show how to extend abstract categorical dualities via monoidal adjunctions,…

形式语言与自动机理论 · 计算机科学 2025-10-15 Fabian Lenke , Henning Urbat , Stefan Milius

Twin-width is a recently formulated graph and matrix invariant that intuitively quantifies how far a graph is from having the structural simplicity of a co-graph. Since its introduction in 2020, twin-width has received increasing attention…

数据结构与算法 · 计算机科学 2025-11-11 Andrei Arhire , Matei Chiriac , Radu Timofte

Label-supervised manifold alignment bridges the gap between unsupervised and correspondence-based paradigms by leveraging shared label information to align multimodal datasets. Still, most existing methods rely on Euclidean geometry to…

机器学习 · 计算机科学 2026-02-03 Adrien Aumon , Myriam Lizotte , Guy Wolf , Kevin R. Moon , Jake S. Rhodes

Consider the following generalization of the classic binary search problem: A searcher is required to find a hidden target vertex $x$ in a graph $G$. To do so, they iteratively perform queries to an oracle, each about a chosen vertex $v$.…

数据结构与算法 · 计算机科学 2026-03-17 Michał Szyfelbein

Based on results by Brugall\'e and Mikhalkin, Fomin and Mikhalkin give formulas for computing classical Severi degrees $N^{d, \delta}$ using long-edge graphs. In 2012, Block, Colley and Kennedy considered the logarithmic version of a…

组合数学 · 数学 2014-01-08 Fu Liu

Lin and Lin have recently shown how starting with a classical query algorithm (decision tree) for a function, we may find upper bounds on its quantum query complexity. More precisely, they have shown that given a decision tree for a…

量子物理 · 物理学 2020-03-04 Salman Beigi , Leila Taghavi