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We extend the notion of mex, which is central in combinatorial number theory, to an arbitrary combinatorial structure, and we prove a general theorem to determine the generating function of the objects having fixed mex. We then study this…

Combinatorics · Mathematics 2026-05-29 Antonio Bernini , Stefano Bilotta , Giulio Cerbai , Luca Ferrari

In this paper, we consider situations in which a given logical function is realized by a multithreshold threshold function. In such situations, constant functions can be easily obtained from multithreshold threshold functions, and…

Neural and Evolutionary Computing · Computer Science 2013-01-03 Yukihiro Kamada , Kiyonori Miyasaki

Generating explanations for neural networks has become crucial for their applications in real-world with respect to reliability and trustworthiness. In natural language processing, existing methods usually provide important features which…

Computation and Language · Computer Science 2020-05-19 Hanjie Chen , Guangtao Zheng , Yangfeng Ji

Math word problem (MWP) is a challenging and critical task in natural language processing. Many recent studies formalize MWP as a generation task and have adopted sequence-to-sequence models to transform problem descriptions to mathematical…

Computation and Language · Computer Science 2021-09-08 Jianhao Shen , Yichun Yin , Lin Li , Lifeng Shang , Xin Jiang , Ming Zhang , Qun Liu

Socratic questioning is an educational method that allows students to discover answers to complex problems by asking them a series of thoughtful questions. Generation of didactically sound questions is challenging, requiring understanding…

Computation and Language · Computer Science 2022-11-24 Kumar Shridhar , Jakub Macina , Mennatallah El-Assady , Tanmay Sinha , Manu Kapur , Mrinmaya Sachan

Recently, Bill Chen, together with his disciples Alvin Dai and Robin Zhou, discovered, and very elegantly proved, an algebraic equation satisfied by the generating function enumerating 123-avoiding words with two occurrences of each of 1,…

Combinatorics · Mathematics 2014-11-20 Nathaniel Shar , Doron Zeilberger

Unsupervised constrained text generation aims to generate text under a given set of constraints without any supervised data. Current state-of-the-art methods stochastically sample edit positions and actions, which may cause unnecessary…

Computation and Language · Computer Science 2024-04-25 Yingwen Fu , Wenjie Ou , Zhou Yu , Yue Lin

Motivated by the concept of "generating operators" for a countable family of operators introduced in the recent paper (arXiv:2306.16800), we find a method to reconstruct the Rankin--Cohen brackets from a very simple multivariable contour…

Representation Theory · Mathematics 2025-06-16 Toshiyuki Kobayashi , Michael Pevzner

We present a conditional text generation framework that posits sentential expressions of possible causes and effects. This framework depends on two novel resources we develop in the course of this work: a very large-scale collection of…

Computation and Language · Computer Science 2021-07-22 Zhongyang Li , Xiao Ding , Ting Liu , J. Edward Hu , Benjamin Van Durme

Constructing artificial lexicons that are pronounceable, typologically plausible, and semantically structured remains an open challenge in computational linguistics. Existing conlang generators either lack formal phonotactic guarantees or…

Computation and Language · Computer Science 2026-05-29 Sankalp Tattwadarshi Swain , Dhruv Kumar

Motivated by the classical ideas of generating functions for orthogonal polynomials, we initiate a new line of investigation on "generating operators" for a family of differential operators between two manifolds. We prove a novel formula of…

Complex Variables · Mathematics 2025-06-16 Toshiyuki Kobayashi , Michael Pevzner

"A generator is a parser of randomness." This perspective on generators for random data structures is well established as folklore in the programming languages community, but it has apparently never been formalized, nor have its…

Programming Languages · Computer Science 2022-03-02 Harrison Goldstein , Benjamin C. Pierce

A new tree model is introduced based on ordered trees, by distinguishing exactly one child of each node that \emph{has} children. The basic enumeration leads to a cubic equation of the generating function. The extraction of its coefficients…

Combinatorics · Mathematics 2026-02-27 Helmut Prodinger

The aim of this paper is to construct general forms of ordinary generating functions for special numbers and polynomials involving Fibonacci type numbers and polynomials, Lucas numbers and polynomials, Chebyshev polynomials, Sextet…

General Mathematics · Mathematics 2023-06-16 Yilmaz Simsek

Lambek's production machines may be used to generate and recognize sentences in a subset of the language described by a production grammar. We determine in this paper the subset of the language of a grammar generated and recognized by such…

Logic in Computer Science · Computer Science 2007-05-23 Riccardo Pucella

In this article, we study directed graphs (digraphs) with a coloring constraint due to Von Neumann and related to Nim-type games. This is equivalent to the notion of kernels of digraphs, which appears in numerous fields of research such as…

Combinatorics · Mathematics 2012-02-06 Cyril Banderier , Jean-Marie Le Bars , Vlady Ravelomanana

A prefix normal word is a binary word with the property that no substring has more 1s than the prefix of the same length. This class of words is important in the context of binary jumbled pattern matching. In this paper we present an…

Data Structures and Algorithms · Computer Science 2014-06-23 Péter Burcsi , Gabriele Fici , Zsuzsanna Lipták , Frank Ruskey , Joe Sawada

We provide new examples of groups without rational cross-sections (also called regular normal forms), using connections with bounded generation and rational orders on groups. Specifically, our examples are extensions of infinite torsion…

Group Theory · Mathematics 2024-06-10 Corentin Bodart

The "necklace process", a procedure constructing necklaces of black and white beads by randomly choosing positions to insert new beads (whose color is uniquely determined based on the chosen location), is revisited. This article illustrates…

Probability · Mathematics 2018-07-25 Benjamin Hackl , Helmut Prodinger

Large language models (LLMs) have demonstrated impressive capabilities in natural language generation. However, their output quality can be inconsistent, posing challenges for generating natural language from logical forms (LFs). This task…

Computation and Language · Computer Science 2023-09-22 Levon Haroutunian , Zhuang Li , Lucian Galescu , Philip Cohen , Raj Tumuluri , Gholamreza Haffari