Studies
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Graph Theory is an area of modern mathematics with many applications in today’s world, but its roots lie in several recreational puzzles going back to the mid-eighteenth century. This chapter will introduce a few main topics in Graph Theory , drawing upon this history. The first two sections look at ways one can traverse a graph (Eulerian trails and Hamiltonian paths), while the last two sections deal with planar graphs (ones that can be drawn so their edges don’t cross) and graph coloring (graphs whose adjacent vertices have different colors). While connected to a couple of earlier topics, this concluding chapter has a more geometric character, balancing out the algebraic emphasis of the rest of the text.
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See The Truth about Königsberg by Brian Hopkins and Robin J. Wilson in the May 2004 issue, of The College Mathematics Journal for a nice discussion of Euler’s argument. Euler’s paper (and lots more) is in Graph Theory : 1736–1936 (Oxford University Press, 1976) by Norman L. Biggs, E. Keith Lloyd, and Robin J. Wilson.
See Joseph Malkevitch’s two 2005 AMS Feature Columns on Euler’s Polyhedral Formula at http://www.ams.org/samplings/feature-column/fcarc-eulers-formula
Robin Wilson’s Four Colors Suffice (Princeton University Press, 2013) gives a fascinating and very readable account of the entire history of the four-color problem.
This is Alexander Soifer’s minimal counterexample. See The Mathematical Coloring Book (Springer, 2009), p. 182. The Fritsch Graph provides another counterexample on nine vertices.
For more information on Gardner’s map and its four-coloring, see the Wolfram MathWorld posting on the Four-Color Theorem at http://mathworld.wolfram.com/Four-ColorTheorem.html.
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Dordt University, Sioux Center, IA, USA
Calvin Jongsma
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Correspondence to Calvin Jongsma .
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Jongsma, C. (2019). Topics in Graph Theory. In: Introduction to Discrete Mathematics via Logic and Proof. Undergraduate Texts in Mathematics. Springer, Cham. https://doi.org/10.1007/978-3-030-25358-5_8
DOI : https://doi.org/10.1007/978-3-030-25358-5_8
Published : 09 November 2019
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Lecture iv pure graph algorithms, enumeration of spanning trees of graphs with rotational symmetry, circuits in graphs and the hamiltonian index.
Decomposition and domination of some graphs, on set-indexers of graphs, three years of graphs and music : some results in graph theory and its applications, hamiltonian cycles in sparse graphs.
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f this graph is not F-free, then do this step again.Step 2 Generate a random number. between 1 and 10, and repeat the next step r times.Step 3 Add a vertex v to G and rand. mly generate edges be-tween v and the vertices of G. If the resulting graph is not F-free, then remove the edges incident to v and generate th.
This thesis is the result of research between January 2002 and February 2005 in three topics of graph theory, namely: spanning 2-connected subgraphs of some classes of grid graphs, Ramsey numbers for paths versus other graphs, and λ-backbone colorings. The papers that together underlay this thesis are listed below. Publications in refereed ...
L(2,1)-labelling on a planar graph was proposed during a stay at INRIA in Nice. The work on the clustering coefficient was mainly carried out at Brunel University. Two chapters of this thesis are dedicated to the investigation of properties of scale-free graphs. These are graphs which have a degree distribution obey-
In this thesis, we exploit this symbiotic relationship between graph theory and algorithms for graph optimization problems and beyond. This thesis consists of three parts. In the first part, we study a classical graph routing problem called the Node-Disjoint Paths (NDP) problem. Given an undirected graph and a set of source-destination pairs of
De nition 1.1.1 Let G=(V,E) be undirected graph with vertex set V=fv 1;v 2;:::;v ng, the degree of a vertex v V, is the number of edges for which v is an end vertex, denoted deg(v)or d(v). The maximum degree of a graph G, denoted by ( G) and the minimum degree of a graph G denoted by (G) are de ned as follows the maximum degree of G is the largest
In this thesis, we exploit this symbiotic relationship between graph theory and algorithms for graph optimization problems and beyond. This thesis consists of three parts. In the first part, we study a graph routing problem called the Node-Disjoint Paths (NDP) problem. Given a graph and a set of source-destination pairs of its vertices, the ...
1.2 Graph Theory Basics 1.2.1 From Bridges to Abstractions The origins of graph theory are often attributed to the 18th-century mathematician, Leon-hard Euler. Euler's investigation of the Königsberg Bridge Problem in 1736 marked the seminal moment in the discipline [11]. The problem revolved around the city of Königs-
Graph theory is an important area of Applied Mathematics with a broad spectrum of applications in many fields. In the Call for Papers for this issue, I asked for submissions presenting new and inoovative approaches for traditional graph-theoretic problems as well as for new applications of graph theory in emerging fields, such as network security, computer science and data analysis ...
graph is a graph that does not contain any arrows on its edges, indicating which way to go. A directed graph, on the other hand, is a graph in which its edges contain arrows indicating which way to go. 2.2 Properties of graph In this section we will cover key properties of a graph. There are two main properties of a graph: degrees and walks.
Distance measures for graph theory : Comparisons and analyzes of different methods Dissertation presented by ... and his precious help throughout the realization of this thesis. Second, I would also like to thank Bertrand Lebichot and Guillaume Guex for agreeing to ... a graph is a mathematical structure that contains a certain number of
In the thesis we study two topics in graph theory. The first one is concerned with the famous conjecture of Hadwiger that every graph G without a minor of a complete graph on t +1 vertices can be coloured with t colours. We investigate how large an induced subgraph of G can be, so that the subgraph can be coloured with t colours.
Shodhganga : a reservoir of Indian theses @ INFLIBNET. Shodhganga. The Shodhganga@INFLIBNET Centre provides a platform for research students to deposit their Ph.D. theses and make it available to the entire scholarly community in open access. Shodhganga@INFLIBNET. Gondwana University.
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mathematics, graph theory is one of the important fields used in structural. models. This structural structure of different objects or technologies leads to. new developments and changes in the ...
Abstract. This book includes a number of research topics in graph theory and its applications. We discuss various research ideas devoted to alpha-discrepancy, strongly perfect graphs, the reconstruction conjectures, graph invariants, hereditary classes of graphs, embedding graphs on topological surfaces, as well as applications of graph theory, such as transport networks and hazard assessments ...
Consult the top 50 dissertations / theses for your research on the topic 'Graph theory.'. Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
Graph theory is applicable to a wide range of practical problems and interacts nicely with computer science. I interviewed a Professor Emeritus of Mathematics, to understand more about the mentoring of graph theory research, including his role in mentoring ve Intel Science Research semi nalists.
The Shodhganga@INFLIBNET Centre provides a platform for research students to deposit their Ph.D. theses and make it available to the entire scholarly community in open access. Shodhganga@INFLIBNET. Madurai Kamaraj University. Department of Mathematics.
Graph Theory is an area of modern mathematics with many applications in today's world, but its roots lie in several recreational puzzles going back to the mid-eighteenth century. This chapter will introduce a few main topics in Graph Theory, drawing upon this history.The first two sections look at ways one can traverse a graph (Eulerian trails and Hamiltonian paths), while the last two ...
The burgeoning of Graph Theory was first aware when I studied the 1940 paper of Brooks, Smith, Stone and Tutte in the Duke Mathematical Journal, ostensibly on squared rectangles, all in the Quest of the Perfect Square. When I first entered the world of Mathematics, I became aware of a strange and little-regarded sect of "Graph Theorists", inhabiting a shadowy borderland known to the rest of ...
Kraft et al. (1991) give a superficial overview of graph theory in libraries. Powell et al. (2011) and Powell and Hopkins (2015) specify use cases in which concepts from graph theory are or could be applied to library data, focussing on citation, co-author, subject-author, and usage data. However, they give only a brief overview and do not go ...
Abstract. In this short introductory course to graph theory, possibly one of the most propulsive areas of contemporary mathematics, some of the basic graph-theoretic concepts together with some ...