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EC11 (due 6/27) : Prove that the graph above cannot be drawn with a single self intersection. (type the answer please)

EC11 (due 6/27) : Prove that the graph above cannot be drawn with a single self intersection. (type the answer please)

Computer Networking: A Top-Down Approach (7th Edition)
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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EC11 (due 6/27) : Prove that the graph above cannot be drawn with a single self intersection. (type the answer please)

### Transcription and Detailed Explanation #### Title: Understanding Graph Theory: Petersen Graph #### Description: The Petersen graph is a famous structure in the study of graph theory. It consists of 10 vertices and 15 edges, characterized by its unique and symmetrical properties. #### Graph Structure: 1. **Vertices and Placement:** - The graph contains a total of 10 vertices, represented by blue dots. - These vertices are arranged in two distinct layers: an inner pentagon (5 vertices) and an outer pentagon (5 vertices) with additional connections between the layers. 2. **Edges:** - There are 15 edges in total (represented by lines connecting the vertices). - Each vertex is connected to 3 other vertices, leading to a regular structure where each vertex has a degree of 3. 3. **Inner and Outer Layers:** - The inner pentagon vertices are directly connected in a cyclic manner, forming a smaller pentagon within the graph. - Similarly, the outer pentagon vertices are directly connected to form a larger surrounding pentagon. 4. **Inter-layer Connections:** - Each vertex in the inner pentagon is connected to one vertex in the outer pentagon, following a pattern that maintains the graph's symmetry. - These connections crisscross in a specific way adding complexity and uniqueness to the Petersen graph. #### Educational Value: The Petersen graph is often used as a counterexample to many graph theory conjectures and is a fundamental object in the study of topics such as: - Graph coloring - Symmetrical properties of graphs - Non-planar graphs - Network topology and design Understanding the Petersen graph can provide deeper insights into the structural properties of more complex graphs and their applications in computer science, mathematics, and related fields.
Transcribed Image Text:### Transcription and Detailed Explanation #### Title: Understanding Graph Theory: Petersen Graph #### Description: The Petersen graph is a famous structure in the study of graph theory. It consists of 10 vertices and 15 edges, characterized by its unique and symmetrical properties. #### Graph Structure: 1. **Vertices and Placement:** - The graph contains a total of 10 vertices, represented by blue dots. - These vertices are arranged in two distinct layers: an inner pentagon (5 vertices) and an outer pentagon (5 vertices) with additional connections between the layers. 2. **Edges:** - There are 15 edges in total (represented by lines connecting the vertices). - Each vertex is connected to 3 other vertices, leading to a regular structure where each vertex has a degree of 3. 3. **Inner and Outer Layers:** - The inner pentagon vertices are directly connected in a cyclic manner, forming a smaller pentagon within the graph. - Similarly, the outer pentagon vertices are directly connected to form a larger surrounding pentagon. 4. **Inter-layer Connections:** - Each vertex in the inner pentagon is connected to one vertex in the outer pentagon, following a pattern that maintains the graph's symmetry. - These connections crisscross in a specific way adding complexity and uniqueness to the Petersen graph. #### Educational Value: The Petersen graph is often used as a counterexample to many graph theory conjectures and is a fundamental object in the study of topics such as: - Graph coloring - Symmetrical properties of graphs - Non-planar graphs - Network topology and design Understanding the Petersen graph can provide deeper insights into the structural properties of more complex graphs and their applications in computer science, mathematics, and related fields.
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