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We consider P systems with a linear membrane structure working on objects over a unary alphabet using sets of rules resembling homomorphisms. Such a restricted variant of P systems allows for a unique minimal representation of the generated…

Formal Languages and Automata Theory · Computer Science 2009-07-30 Rudolf Freund , Andreas Klein , Martin Kutrib

Large Language Models (LLMs) are reshaping unsupervised learning by offering an unprecedented ability to perform text clustering based on their deep semantic understanding. However, their direct application is fundamentally limited by a…

Computation and Language · Computer Science 2026-04-08 Yuanjie Zhu , Liangwei Yang , Ke Xu , Weizhi Zhang , Zihe Song , Jindong Wang , Philip S. Yu

We consider the language consisting of all words such that it is possible to obtain the empty word by iteratively deleting powers. It turns out that in the case of deleting squares in binary words this language is regular, and in the case…

Formal Languages and Automata Theory · Computer Science 2017-12-08 John Machacek

The polarized SILL programming language uniformly integrates functional programming and session-typed message-passing concurrency. It supports general recursion, asynchronous and synchronous communication, and higher-order programs that…

Programming Languages · Computer Science 2020-05-12 Ryan Kavanagh

What is here called controlled natural language (CNL) has traditionally been given many different names. Especially during the last four decades, a wide variety of such languages have been designed. They are applied to improve communication…

Computation and Language · Computer Science 2015-07-08 Tobias Kuhn

Altenbernd, Thomas and W\"ohrle have considered in [ATW02] acceptance of languages of infinite two-dimensional words (infinite pictures) by finite tiling systems, with the usual acceptance conditions, such as the B\"uchi and Muller ones,…

Logic · Mathematics 2011-08-03 Olivier Finkel

In this thesis, we study the place of regular languages within the communication complexity setting. In particular, we are interested in the non-deterministic communication complexity of regular languages. We show that a regular language…

Computational Complexity · Computer Science 2008-02-01 Anil Ada

In this article we give two different ways of representations of circular words. Representations with tuples are intended as a compact notation, while representations with trees give a way to easily process all conjugates of a word. The…

Formal Languages and Automata Theory · Computer Science 2014-05-23 László Hegedüs , Benedek Nagy

We develop a formal grammatical system called a link grammar, show how English grammar can be encoded in such a system, and give algorithms for efficiently parsing with a link grammar. Although the expressive power of link grammars is…

cmp-lg · Computer Science 2008-02-03 Daniel D. K. Sleator , Davy Temperley

Motivated by work on bio-operations on DNA strings, we consider an outfix-guided insertion operation that can be viewed as a generalization of the overlap assembly operation on strings studied previously. As the main result we construct a…

Formal Languages and Automata Theory · Computer Science 2017-07-18 Da-Jung Cho , Yo-Sub Han , Timothy Ng , Kai Salomaa

We study languages and formal power series associated to (variants of) Hammersley's process. We show that the ordinary Hammersley process yields a regular language and the Hammersley tree process yields deterministic context-free (but…

Formal Languages and Automata Theory · Computer Science 2018-04-10 Cosmin Bonchis , Gabriel Istrate , Vlad Rochian

The circular dictionary matching problem is an extension of the classical dictionary matching problem where every string in the dictionary is interpreted as a circular string: after reading the last character of a string, we can move back…

Data Structures and Algorithms · Computer Science 2025-04-07 Nicola Cotumaccio

This paper studies the complexity of languages of finite words using automata theory. To go beyond the class of regular languages, we consider infinite automata and the notion of state complexity defined by Karp. Motivated by the seminal…

Formal Languages and Automata Theory · Computer Science 2019-12-25 Nathanaël Fijalkow

We present Generative Logic (GL), a deterministic architecture that starts from user-supplied axiomatic definitions written in a minimalist Mathematical Programming Language (MPL) and systematically explores a configurable region of their…

Logic in Computer Science · Computer Science 2026-04-01 Nikolai Sergeev

Coaxing out desired behavior from pretrained models, while avoiding undesirable ones, has redefined NLP and is reshaping how we interact with computers. What was once a scientific engineering discipline-in which building blocks are stacked…

Machine Learning · Computer Science 2023-08-02 Ari Holtzman , Peter West , Luke Zettlemoyer

Anisimov and Seifert show that a group has a regular word problem ifand only if it is finite. Muller and Schupp (together with Dunwoody's accessibility result) show that a group has context free word problem if and only if it is virtually…

Group Theory · Mathematics 2008-02-03 Michael Shapiro

We present a system of relational syllogistic, based on classical propositional logic, having primitives of the following form: Some A are R-related to some B; Some A are R-related to all B; All A are R-related to some B; All A are…

Logic in Computer Science · Computer Science 2015-03-19 Nikolay Ivanov , Dimiter Vakarelov

The ability to perform causal reasoning is widely considered a core feature of intelligence. In this work, we investigate whether large language models (LLMs) can coherently reason about causality. Much of the existing work in natural…

We propose a cut-free cyclic system for Transitive Closure Logic (TCL) based on a form of hypersequents, suitable for automated reasoning via proof search. We show that previously proposed sequent systems are cut-free incomplete for basic…

Logic in Computer Science · Computer Science 2022-05-19 Anupam Das , Marianna Girlando

Separations among the first order logic ${\cal R}ing(0,+,*)$ of finite residue class rings, its extensions with generalized quantifiers, and in the presence of a built-in order are shown, using algebraic methods from class field theory.…

Logic in Computer Science · Computer Science 2025-07-08 Argimiro Arratia , Carlos E. Ortiz