Graphs, simplicial complexes and hypergraphs: Spectral theory and topology

R Mulas, D Horak, J Jost - Higher-order systems, 2022 - Springer
In this chapter we discuss the spectral theory of discrete structures such as graphs, simplicial
complexes and hypergraphs. We focus, in particular, on the corresponding Laplace …

Topological characterization and typical topologies of disruption aggregates in asphalt mixture

C **ng, B Liu, H Liu, L Zhang, H Xu… - Journal of Materials in …, 2024 - ascelibrary.org
Mesoscale contact networks for asphalt mixtures play a crucial role in load resistance.
However, there is a lack of quantitative characterization methods for contact networks …

Spectral theory of Laplace operators on oriented hypergraphs

R Mulas, D Zhang - Discrete mathematics, 2021 - Elsevier
Several new spectral properties of the normalized Laplacian defined for oriented
hypergraphs are shown. The eigenvalue 1 and the case of duplicate vertices are discussed; …

Sharp bounds for the largest eigenvalue

R Mulas - Mathematical notes, 2021 - Springer
Sharp Bounds for the Largest Eigenvalue | Mathematical Notes Skip to main content
SpringerLink Account Menu Find a journal Publish with us Track your research Search Cart …

Spectral properties of oriented hypergraphs

N Reff - arxiv preprint arxiv:1506.05054, 2015 - arxiv.org
An oriented hypergraph is a hypergraph where each vertex-edge incidence is given a label
of $+ 1$ or $-1$. The adjacency and Laplacian eigenvalues of an oriented hypergraph are …

Oriented Hypergraphs I: Introduction and Balance

LJ Rusnak - arxiv preprint arxiv:1210.0943, 2012 - arxiv.org
An oriented hypergraph is an oriented incidence structure that extends the concept of a
signed graph. We introduce hypergraphic structures and techniques central to the extension …

[HTML][HTML] A characterization of oriented hypergraphic Laplacian and adjacency matrix coefficients

G Chen, V Liu, E Robinson, LJ Rusnak… - Linear Algebra and its …, 2018 - Elsevier
An oriented hypergraph is an oriented incidence structure that generalizes and unifies graph
and hypergraph theoretic results by examining its locally signed graphic substructure. In this …

[PDF][PDF] Lower bounds for the Laplacian spectral radius of an oriented hypergraph.

O Kitouni, N Reff - Australas. J Comb., 2019 - ajc.maths.uq.edu.au
An oriented hypergraph is a hypergraph where each vertex-edge incidence is given a label
of+ 1 or− 1. This labeling allows one to naturally define adjacencies so the Laplacian matrix …

Spectral theory of weighted hypergraphs via tensors

F Galuppi, R Mulas, L Venturello - Linear and Multilinear Algebra, 2023 - Taylor & Francis
One way to study a hypergraph is to attach to it a tensor. Tensors are a generalization of
matrices, and they are an efficient way to encode information in a compact form. In this …

[HTML][HTML] Spectra of cycle and path families of oriented hypergraphs

L Duttweiler, N Reff - Linear Algebra and its Applications, 2019 - Elsevier
An oriented hypergraph is a hypergraph where each vertex-edge incidence is given a label
of either+ 1 or− 1. This generalizes signed graphs to a hypergraph setting and …