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Helmholtz operators on infinite graphs [PDF]

open access: yesHeliyon
The Helmholtz equation in its simplest form is Δu(a)=−k2u(a). In this note, we study a generalized discrete version of this equation on an infinite graph, by using potential-theoretic methods.
Varadha Raj Manivannan   +1 more
doaj   +4 more sources

Characterizing Omega-Regularity through Finite-Memory Determinacy of Games on Infinite Graphs [PDF]

open access: yesTheoretiCS, 2023
We consider zero-sum games on infinite graphs, with objectives specified as sets of infinite words over some alphabet of colors. A well-studied class of objectives is the one of $\omega$-regular objectives, due to its relation to many natural problems in
Patricia Bouyer   +2 more
doaj   +1 more source

Characterizing Positionality in Games of Infinite Duration over Infinite Graphs [PDF]

open access: yesTheoretiCS, 2023
We study turn-based quantitative games of infinite duration opposing two antagonistic players and played over graphs. This model is widely accepted as providing the adequate framework for formalizing the synthesis question for reactive systems.
Pierre Ohlmann
doaj   +1 more source

A Comprehensive Overview on the Formation of Homomorphic Copies in Coset Graphs for the Modular Group

open access: yesJournal of Mathematics, 2021
This work deals with the well-known group-theoretic graphs called coset graphs for the modular group G and its applications. The group action of G on real quadratic fields forms infinite coset graphs. These graphs are made up of closed paths. When M acts
Hanan Alolaiyan   +3 more
doaj   +1 more source

Approximations of Acyclic Graphs

open access: yesИзвестия Иркутского государственного университета: Серия "Математика", 2022
In this paper, approximations of acyclic graphs are studied. It is proved that any theory of an acyclic graph (tree) of finite diameter is pseudofinite with respect to acyclic graphs (trees), that is, any such theory is approximated by theories of finite
N.D. Markhabatov
doaj   +1 more source

Distinguishing Infinite Graphs [PDF]

open access: yesThe Electronic Journal of Combinatorics, 2007
The distinguishing number $D(G)$ of a graph $G$ is the least cardinal number $\aleph$ such that $G$ has a labeling with $\aleph$ labels that is only preserved by the trivial automorphism. We show that the distinguishing number of the countable random graph is two, that tree-like graphs with not more than continuum many vertices have distinguishing ...
Imrich, Wilfried   +2 more
openaire   +2 more sources

Infinite limits and folding [PDF]

open access: yesDiscrete Mathematics & Theoretical Computer Science, 2005
We study infinite limits of graphs generated by the duplication model for biological networks. We prove that with probability 1, the sole nontrivial connected component of the limits is unique up to isomorphism. We describe certain infinite deterministic
Anthony Bonato, Jeannette Janssen
doaj   +1 more source

Graphoidally independent infinite graphs

open access: yesAKCE International Journal of Graphs and Combinatorics, 2021
A graphoidal cover of a graph G (not necessarily finite) is a collection ψ of paths in G, called ψ-edges, (not necessarily finite, not necessarily open) satisfying the following axioms: (GC-1) Every vertex of G is an internal vertex of at most one path ...
Purnima Gupta, Deepti Jain
doaj   +1 more source

Ricci Curvature on Birth-Death Processes

open access: yesAxioms, 2023
In this paper, we study curvature dimension conditions on birth-death processes which correspond to linear graphs, i.e., weighted graphs supported on the infinite line or the half line. We give a combinatorial characterization of Bakry and Émery’s CD(K,n)
Bobo Hua, Florentin Münch
doaj   +1 more source

Hamilton-connectedness and Hamilton-laceability of planar geometric graphs with applications

open access: yesAIMS Mathematics, 2021
In this paper, we have used two different proof techniques to show the Hamilton-connectedness of graphs. By using the vertex connectivity and Hamiltoniancity of graphs, we construct an infinite family of Hamilton-connected convex polytope line graphs ...
Suliman Khan   +4 more
doaj   +1 more source

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