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Compound probabilistic context-free grammars (C-PCFGs) have recently established a new state of the art for unsupervised phrase-structure grammar induction. However, due to the high space and time complexities of chart-based representation…

Computation and Language · Computer Science 2023-10-24 Yanpeng Zhao , Ivan Titov

Scaling language models to longer contexts is essential for capturing rich dependencies across extended discourse. However, na\"ive context extension imposes significant computational and memory burdens, often resulting in inefficiencies…

Computation and Language · Computer Science 2026-02-03 Wenhao Li , Bangcheng Sun , Weihao Ye , Tianyi Zhang , Daohai Yu , Fei Chao , Rongrong Ji

Although neural sequence-to-sequence models have been successfully applied to semantic parsing, they fail at compositional generalization, i.e., they are unable to systematically generalize to unseen compositions of seen components.…

Computation and Language · Computer Science 2021-09-10 Hao Zheng , Mirella Lapata

Formal languages let us define the textual representation of data with precision. Formal grammars, typically in the form of BNF-like productions, describe the language syntax, which is then annotated for syntax-directed translation and…

Formal Languages and Automata Theory · Computer Science 2015-01-15 Luis Quesada , Fernando Berzal , Juan-Carlos Cubero

Neural QCFG is a grammar-based sequence-tosequence (seq2seq) model with strong inductive biases on hierarchical structures. It excels in interpretability and generalization but suffers from expensive inference. In this paper, we study two…

Computation and Language · Computer Science 2023-06-06 Chao Lou , Kewei Tu

We address the challenge of extracting structured information from business documents without detailed annotations. We propose Deep Conditional Probabilistic Context Free Grammars (DeepCPCFG) to parse two-dimensional complex documents and…

Computation and Language · Computer Science 2021-06-08 Freddy C. Chua , Nigel P. Duffy

We propose neural models that can normalize text by considering the similarities of word strings and sounds. We experimentally compared a model that considers the similarities of both word strings and sounds, a model that considers only the…

Computation and Language · Computer Science 2020-11-05 Riku Kawamura , Tatsuya Aoki , Hidetaka Kamigaito , Hiroya Takamura , Manabu Okumura

In 1975, Valiant showed that Boolean matrix multiplication can be used for parsing context-free grammars (CFGs), yielding the asympotically fastest (although not practical) CFG parsing algorithm known. We prove a dual result: any CFG parser…

Computation and Language · Computer Science 2007-05-23 Lillian Lee

Compositional generalization is a key ability of humans that enables us to learn new concepts from only a handful examples. Neural machine learning models, including the now ubiquitous Transformers, struggle to generalize in this way, and…

Machine Learning · Computer Science 2024-01-19 Tim Klinger , Luke Liu , Soham Dan , Maxwell Crouse , Parikshit Ram , Alexander Gray

The web-scale of pretraining data has created an important evaluation challenge: to disentangle linguistic competence on cases well-represented in pretraining data from generalization to out-of-domain language, specifically the dynamic,…

Computation and Language · Computer Science 2025-08-14 Wesley Scivetti , Melissa Torgbi , Austin Blodgett , Mollie Shichman , Taylor Hudson , Claire Bonial , Harish Tayyar Madabushi

The primary use of any probabilistic model involving a set of random variables is to run inference and sampling queries on it. Inference queries in classical probabilistic models is concerned by the computation of marginal or conditional…

Artificial Intelligence · Computer Science 2022-06-28 Reda Marzouk , Colin de La Higuera

This paper presents a novel training method, Conditional Masked Language Modeling (CMLM), to effectively learn sentence representations on large scale unlabeled corpora. CMLM integrates sentence representation learning into MLM training by…

Computation and Language · Computer Science 2021-09-13 Ziyi Yang , Yinfei Yang , Daniel Cer , Jax Law , Eric Darve

We study the problem of computing the probability that a given stochastic context-free grammar (SCFG), G, generates a string in a given regular language L(D) (given by a DFA, D). This basic problem has a number of applications in…

Formal Languages and Automata Theory · Computer Science 2013-02-27 Kousha Etessami , Alistair Stewart , Mihalis Yannakakis

Graph data model and graph databases are very popular in various areas such as bioinformatics, semantic web, and social networks. One specific problem in the area is a path querying with constraints formulated in terms of formal grammars.…

Databases · Computer Science 2023-02-21 Semyon Grigorev , Anastasiya Ragozina

This paper proposes the use of ``pattern-based'' context-free grammars as a basis for building machine translation (MT) systems, which are now being adopted as personal tools by a broad range of users in the cyberspace society. We discuss…

cmp-lg · Computer Science 2008-02-03 Koichi Takeda

We develop a representation suitable for the unconstrained recognition of words in natural images: the general case of no fixed lexicon and unknown length. To this end we propose a convolutional neural network (CNN) based architecture which…

Computer Vision and Pattern Recognition · Computer Science 2015-04-13 Max Jaderberg , Karen Simonyan , Andrea Vedaldi , Andrew Zisserman

This work proposes a simple training-free prompt-free approach to leverage large language models (LLMs) for the Chinese spelling correction (CSC) task, which is totally different from all previous CSC approaches. The key idea is to use an…

Computation and Language · Computer Science 2024-10-08 Houquan Zhou , Zhenghua Li , Bo Zhang , Chen Li , Shaopeng Lai , Ji Zhang , Fei Huang , Min Zhang

We propose a scalable framework for deciding, proving, and explaining (in-)equivalence of context-free grammars. We present an implementation of the framework and evaluate it on large data sets collected within educational support systems.…

Formal Languages and Automata Theory · Computer Science 2026-04-09 Marko Schmellenkamp , Thomas Zeume , Sven Argo , Sandra Kiefer , Cedric Siems , Fynn Stebel

Recently, researches have explored the graph neural network (GNN) techniques on text classification, since GNN does well in handling complex structures and preserving global information. However, previous methods based on GNN are mainly…

Computation and Language · Computer Science 2019-10-09 Lianzhe Huang , Dehong Ma , Sujian Li , Xiaodong Zhang , Houfeng WANG

There has been recent interest in applying cognitively or empirically motivated bounds on recursion depth to limit the search space of grammar induction models (Ponvert et al., 2011; Noji and Johnson, 2016; Shain et al., 2016). This work…

Computation and Language · Computer Science 2018-02-27 Lifeng Jin , Finale Doshi-Velez , Timothy Miller , William Schuler , Lane Schwartz