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Nonlinear network dynamics are notoriously difficult to understand. Here we study a class of recurrent neural networks called combinatorial threshold-linear networks (CTLNs) whose dynamics are determined by the structure of a directed…

Neurons and Cognition · Quantitative Biology 2021-09-16 Daniela Egas Santander , Stefania Ebli , Alice Patania , Nicole Sanderson , Felicia Burtscher , Katherine Morrison , Carina Curto

Threshold-linear networks (TLNs) are models of neural networks that consist of simple, perceptron-like neurons and exhibit nonlinear dynamics that are determined by the network's connectivity. The fixed points of a TLN, including both…

Neurons and Cognition · Quantitative Biology 2018-08-06 Carina Curto , Jesse Geneson , Katherine Morrison

Combinatorial threshold-linear networks (CTLNs) are a special class of recurrent neural networks whose dynamics are tightly controlled by an underlying directed graph. Recurrent networks have long been used as models for associative memory…

Neurons and Cognition · Quantitative Biology 2023-11-21 Carina Curto , Jesse Geneson , Katherine Morrison

Combinatorial threshold-linear networks (CTLNs) are a special class of inhibition-dominated TLNs defined from directed graphs. Like more general TLNs, they display a wide variety of nonlinear dynamics including multistability, limit cycles,…

Neurons and Cognition · Quantitative Biology 2022-08-16 Caitlyn Parmelee , Samantha Moore , Katherine Morrison , Carina Curto

Neural network models in neuroscience allow one to study how the connections between neurons shape the activity of neural circuits in the brain. In this chapter, we study Combinatorial Threshold-Linear Networks (CTLNs) in order to…

Neurons and Cognition · Quantitative Biology 2018-04-05 Katherine Morrison , Carina Curto

Sequences of neural activity arise in many brain areas, including cortex, hippocampus, and central pattern generator circuits that underlie rhythmic behaviors like locomotion. While network architectures supporting sequence generation vary…

Neurons and Cognition · Quantitative Biology 2022-08-16 Caitlyn Parmelee , Juliana Londono Alvarez , Carina Curto , Katherine Morrison

This study conducts a comprehensive bibliometric analysis of research on domination in graph theory from 1961 to 2024, based on Scopus-indexed publications retrieved using the query (dominating OR domination) AND graph. The analysis…

Social and Information Networks · Computer Science 2025-03-13 Jonecis A. Dayap , Leomarich F. Casinillo , Bijo S. Anand , Joey S. Estorosos , Ricky B. Villeta

A set $D$ of vertices in a graph $G=(V,E)$ is a degree restricted dominating set for $G$ if each vertex $v_i$ in $D$ is dominating atmost $g(d_i)$ vertices of $V-D$, where $g$ is a function restricting the degree value $d_i$ with respect to…

Combinatorics · Mathematics 2023-05-30 Shyam S. Kamath , Nithya Muraleedharan

An upper dominating set in a graph is a minimal (with respect to set inclusion) dominating set of maximum cardinality. The problem of finding an upper dominating set is generally NP-hard. We study the complexity of this problem in classes…

Discrete Mathematics · Computer Science 2016-09-07 Hassan AbouEisha , Shahid Hussain , Vadim Lozin , Jérôme Monnot , Bernard Ries , Viktor Zamaraev

To any inhibition-dominated threshold-linear network (TLN) we can associate a directed graph that captures the pattern of strong and weak inhibition between neurons. Robust motifs are graphs for which the structure of fixed points in the…

Neurons and Cognition · Quantitative Biology 2019-12-18 Carina Curto , Christopher Langdon , Katherine Morrison

The study of power domination in graphs arises from the problem of placing a minimum number of measurement devices in an electrical network while monitoring the entire network. A power dominating set of a graph is a set of vertices from…

Combinatorics · Mathematics 2017-12-08 Boris Brimkov , Derek Mikesell , Logan Smith

This paper introduces the concept of compliant vertices and compliant graphs, with a focus on the total domination degree (TDD) of a vertex in compliant graphs. The TDD is systematically calculated for various graph classes, including path…

Combinatorics · Mathematics 2024-09-24 Kavya R. Nair , M. S. Sunitha

While a number of bounds are known on the zero forcing number $Z(G)$ of a graph $G$ expressed in terms of the order of a graph and maximum or minimum degree, we present two bounds that are related to the (upper) total domination number…

Combinatorics · Mathematics 2023-10-12 Boštjan Brešar , María Gracia Cornet , Tanja Dravec , Michael Henning

A set $D$ of vertices of a graph $G$ is locating if every two distinct vertices outside $D$ have distinct neighbors in $D$; that is, for distinct vertices $u$ and $v$ outside $D$, $N(u) \cap D \neq N(v) \cap D$, where $N(u)$ denotes the…

Combinatorics · Mathematics 2016-08-12 Florent Foucaud , Michael A. Henning

A graph $G$ is well-covered if every minimal vertex cover of $G$ is minimum, and a graph $G$ is well-dominated if every minimal dominating set of $G$ is minimum. Studies on well-covered graphs were initiated in [Plummer, JCT 1970], and…

Combinatorics · Mathematics 2022-08-19 Akanksha Agrawal , Henning Fernau , Philipp Kindermann , Kevin Mann , Uéverton S. Souza

The concept of domination in graphs plays a central role in understanding structural properties and applications in network theory. In this study, we focus on the paired disjunctive domination number in the context of middle graphs, a…

Discrete Mathematics · Computer Science 2025-12-19 Hande Tuncel Golpek , Zeliha Kartal Yildiz , Aysun Aytac

In previous works, we introduced the notion of dominant vertices in the context of dynamical systems on networks. This is a set of nodes in the underlying network whose evolution determines the whole network's dynamics after a transient…

Dynamical Systems · Mathematics 2026-03-05 Andrea España , William Funez , Edgardo Ugalde

The dominating graph of a graph G is a graph whose vertices correspond to the dominating sets of G and two vertices are adjacent whenever their corresponding dominating sets differ in exactly one vertex. Studying properties of dominating…

Combinatorics · Mathematics 2022-12-12 Alireza Mofidi

Threshold-linear networks are a common class of firing rate models that describe recurrent interactions among neurons. Unlike their linear counterparts, these networks generically possess multiple stable fixed points (steady states), making…

Neurons and Cognition · Quantitative Biology 2016-12-28 Carina Curto , Katherine Morrison

The connected domination game is played just as the domination game, with an additional requirement that at each stage of the game the vertices played induce a connected subgraph. The number of moves in a D-game (an S-game, resp.) on a…

Combinatorics · Mathematics 2021-12-21 Csilla Bujtás , Vesna Iršič , Sandi Klavžar
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