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PSU - CS 250 - CS 250, Final Study Guide - Study Guide

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PSU - CS 250 - CS 250, Final Study Guide - Study Guide

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background image CS250, Week 10 Notes  PSU: Fall term    Graph Theory:   A graph is a pair (V, E), where V is a set of elements called vertices, nodes, or points 
and E is a set of pairs of vertices called edges or arcs. 
  Variations:   Edges can be directed or undirected.    
background image   Edges can be weighted.     Edges can cycle:   
background image Notations:  Adjacent nodes    Initial and terminal node of an edge  A digraph (or a directed graph) is a  graph  in which the edges are directed. (Formally:  a digraph is a (usually finite) set of vertices V and set of ordered pairs (a,b) (where a, 
 are in V) called edges. The vertex a is the initial vertex of the edge 
and b the terminal vertex
    Edge incident to and from a node   
background image Degrees of vertex, isolated (0), pendant (1)  A vertex with degree zero is called an isolated vertex.    By using degree of a vertex, we have a two special types of vertices. A vertex 
with degree one is called a pendent vertex. 
    In-degree deg-(v) and out degree deg+(v) of node v    Adjacency matrix:  In graph theory and computer science, an adjacency matrix is a square matrix used to 
represent a finite graph. The elements of the matrix indicate whether pairs of vertices are 
adjacent or not in the graph. In the special case of a finite simple graph, the adjacency 
 is a (0,1)-matrix with zeros on its diagonal. 

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School: Portland State University
Department: Engineering
Course: Discrete Structures I
Professor: Sergio Antony
Term: Fall 2016
Tags: Discrete Structures and Discrete math
Name: CS 250, Final Study Guide
Description: Here are my notes for week 6, 7, 9 and 10. My week 8 notes are attached to the second midterm and weeks 1-5 are attached to the first midterm. Hope these help and good luck!
Uploaded: 12/03/2016
19 Pages 99 Views 79 Unlocks
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