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We present a new and powerful algebraic framework for graph rewriting, based on drags, a class of graphs enjoying a novel composition operator. Graphs are embellished with roots and sprouts, which can be wired together to form edges. Drags…

Logic in Computer Science · Computer Science 2024-06-28 Nachum Dershowitz , Jean-Pierre Jouannaud , Fernando Orejas

We offer a new perspective on the closed graph theorem and the open mapping theorem for separated barrelled spaces and fully complete spaces.

Functional Analysis · Mathematics 2019-12-12 P. L. Robinson

We study triangle decompositions of graphs. We consider constructions of classes of graphs where every edge lies on a triangle and the addition of the minimum number of multiple edges between already adjacent vertices results in a strongly…

Combinatorics · Mathematics 2021-08-23 C. M. Mynhardt , A. K. Wright

We briefly present a new construction of a 3-to-1 unrecoverable electrical network. This is a taste of a comprehensive forthcoming paper on unrecoverable electrical networks.

Combinatorics · Mathematics 2014-10-23 Avi Levy

We complete a classification of the two-vertex geometrically irreducible algebras. We also classify the algebras in new classes of hom- and ext-irreducible algebras.

Representation Theory · Mathematics 2024-05-08 Grzegorz Bobinski , Grzegorz Zwara

We define a natural class of graphs by generalizing prior notions of visibility, allowing the representing regions and sightlines to be arbitrary. We consider mainly the case of compact connected representing regions, proving two results…

Combinatorics · Mathematics 2007-05-23 Mike Develin , Stephen Hartke , David Petrie Moulton

In this paper, we will consider the graph w*-probability theory.

Operator Algebras · Mathematics 2007-05-23 Ilwoo Cho

A new family of maximal curves over a finite field is presented and some of their properties are investigated.

Algebraic Geometry · Mathematics 2007-11-06 Massimo Giulietti , Gabor Korchmaros

The matching polynomial of a graph is the generating function of the numbers of its matchings with respect to their cardinality. A graph polynomial is polynomial reconstructible, if its value for a graph can be determined from its values…

Combinatorics · Mathematics 2014-04-15 Xueliang Li , Yongtang Shi , Martin Trinks

In this paper, we propose a new type of graph, denoted as "embedded-graph", and its theory, which employs a distributed representation to describe the relations on the graph edges. Embedded-graphs can express linguistic and complicated…

Discrete Mathematics · Computer Science 2017-09-15 Atsushi Yokoyama

Any graph which is not vertex transitive has a proper induced subgraph which is unique due to its structure or the way of its connection to the rest of the graph. We have called such subgraph as an anchor. Using an anchor which, in fact, is…

Combinatorics · Mathematics 2016-11-08 Ameneh Farhadian

We introduce a reducibility on classes of structures, essentially a uniform enumeration reducibility. This reducibility is inspired by the Friedman-Stanley paper on using Borel reductions to compare classes of countable structures. This…

Logic · Mathematics 2008-03-25 Wesley Calvert , Desmond Cummins , Sara Miller , Julia F. Knight

In this thesis we prove Schur-positivity of certain graph families. In addition, we exlpor existence of cyclic descent extensions on several families of Schur-positive sets.

Combinatorics · Mathematics 2023-08-29 Yuval Khachatryan-Raziel

This note provides new closed forms evaluations of a few classes of exponential sums associated with elliptic curves and hyperelliptic curves.

Number Theory · Mathematics 2011-03-23 N. A. Carella

The concept of coreflexive set is introduced to study the structure of digraphs. New characterizations of line digraphs and nth-order line digraphs are given. Coreflexive sets also lead to another natural way of forming an intersection…

Combinatorics · Mathematics 2007-05-23 Xinming Liu , Douglas B. West

A new kind of diagrams is presented, showing the causal structure of bimetric interactions.

General Relativity and Quantum Cosmology · Physics 2019-04-24 Mikica Kocic

We study topological properties of the graph topology.

General Topology · Mathematics 2012-07-09 Lubica Hola

Graphs are widely used as a popular representation of the network structure of connected data. Graph data can be found in a broad spectrum of application domains such as social systems, ecosystems, biological networks, knowledge graphs, and…

Machine Learning · Computer Science 2021-05-04 Feng Xia , Ke Sun , Shuo Yu , Abdul Aziz , Liangtian Wan , Shirui Pan , Huan Liu

In this work, we show that the class of word-representable graphs is closed under split recomposition and determine the representation number of the graph obtained by recomposing two word-representable graphs. Accordingly, we show that the…

Discrete Mathematics · Computer Science 2024-01-05 Tithi Dwary , K. V. Krishna

A classification is given of all the countable homogeneous ordered bipartite graphs.

Combinatorics · Mathematics 2024-01-17 J. K. Truss