## Chapter 1 Urban Services Videos and Lecture Notes

 Reading Assignment Video Lecture Notes 1.1 Euler Circuits pages 5 - 8 Section 1.1 Video Section 1.1 Lecture notes 1.2 Finding Euler Circuits pages 9 - 13 Section 1.2 Video Section 1.2 Lecture notes 1.3 Beyond Euler Circuits pages 13 - 19 Section 1.3 Video Section 1.3 Lecture notes

## Chapter 1 Objectives (Skills)

• Determine by observation if a graph is connected.
• Identify vertices and edges of a given graph.
• Construct the graph of a given street network.
• Determine by observation the valence of each vertex of a graph.
• Define an Euler circuit.
• List the two conditions for the existence of an Euler circuit.
• Determine whether a graph contains an Euler circuit.
• If a graph contains an Euler circuit, list one such circuit by identifying the order of vertices in the circuitâ€™s path.
• If a graph does not contain an Euler circuit, add a minimum number of edges to eulerize the graph.
• Identify management science problems whose solutions involve Euler circuits.

## Quiz 1 Chapter 1 (Sakai-> Tests & Quizzes)

• The quiz for Chapter 1 will be available from 12:00am Jan. 26 - 11:55pm Feb. 12.
• The quiz will consist of 10 multiple choice questions.
• You will have a maximum of two hours to complete the quiz.
• You will be allow two tries. The computer will accept the best score.
• Failure to take the quiz by 11:55pm Feb. 12 will be given a zero. No exceptions!

## Homework Assignments (Sakai -> Assignments)

• Chapter 1
pages 25-29 Problems 4, 8, 14abc, 30, 34, 40
Due by 11:55 pm Feb. 12
• Use the Assignments tool to submit homework.
• Homework help.
• Problems 4 and 8. Carefully read the definitions and examples in Section 1.1 before responding to these exercises.
• Problem 14. Understand the definition of valences (Section 1.2) before answering the parts of this exercise that refer to figures in Section 1.2.
• Problems 30 and 34. Carefully read Section 1.2 before responding to these exercises. Problem 34, redraw the figures and label the edges, similar to problem 30 labeling.
• Problem 40. Carefully read Section 1.3 before responding to this exercise. Redraw the graph and label the edges to show the Euler circuit. Count the valence of each vertex.
• I will NOT accept homework with answers only. Show all work.

## Companion Website

• Go to the companion website and navigate to the applet exercises.
• Click on the Euler Circuit applet and follow the directions.
• Click on the Eulerizing a Graph applet and follow the directions.
• In the companion website navigate to Video Clips and click on Euler circuits

## Chapter worksheets (Sakai -> Assignments)

• Due by 11:55 pm Feb. 5
• Use the Assignments tool to submit worksheet.

## Discussion Topic (Sakai-> Forums)

• If you were making a recommendation to the mayor of Providence concerning proposed new street-sweeping routes, designed using the theory of this chapter, would you recommend that the changes be adopted or not? List a few pros and cons. Does a grid of two-way streets always have a Eulerian solution? What effect would one way streets have on the problem of street sweeping? What effect would multiple sweeper trucks used have on the problem? Suppose that each night, one sweeper followed a Eulerian circuit on the street grid. Would there always be an Eulerian circuit left to sweep every night until all the sweeping is done?
• Discussion for Chapter 1 will open at 12:00 am January 26
• You are required to participate in the discussion boards.
• Discussion topic will end at 11:55 pm February 12
• See the syllabus on the grading rubric for discussions.

## James Baglama

Email: jbaglama@uri.edu
Office hours: By appointment
Office: Lippitt Hall 200
Office Phone: (401) 874-2709

## For All Practical Purposes

The required textbook, "For All Practical Purposes", 9th edition by COMAP, Publisher W.H. Freeman. Do NOT use an older edition. All students must have either a phyiscal copy of the textbook or an ebook.Click on the textbook above to go to the ebook.

## For All Practical Purposes Campanion Site

The required textbook, The textbook "For All Practical Purposes", 9th edition by COMAP,Publisher W.H. Freeman has a campanion website. The campanion website contains a lot helpful material,e.g. Java Applets, falshcards, practice quizzes. The site can be accessed via the link Campanion or click on the picture above to go to the campanion website.