A random undirected graph has 9 vertices. An unordered cycle is a connection within the graph that connects a number of vertices. For example an unordered cycle of 3 would be a triangle within the graph of 3 connected vertices. To find the total number of possible unordered cycles of 3 vertices from a total of 9 you can use the Combination Formula C(n,r) = n!/r!(n-r)! which is total number of possible combinations of r objects from a set of n objects. If the probability of an edge between any two vertices is 50% - what is the expected number of unordered cycles?
We can select 3 vertices from 9 in ways = 9C3=84
Probability that 3 vertices (a,b,c) form a cycle = Probability of
edge between vertices a and b∗ Probability of edge
between vertices b and c∗Probability of edge between vertices c and
a
=0.5*0.5*0.5=0.125
So, expected number of cycles of length 3 = 84*0.125=10.5
A random undirected graph has 9 vertices. An unordered cycle is a connection within the graph...
3. A Unicvcle Problem Prove that a cycle exists in an undirected graph if and only if a BFS of that graph has a cross-edge. (**) Your proof may use the following facts from graph theory . There exists a unique path between any two vertices of a tree. . Adding any edge to a tree creates a unique cycle.
Please show work clearly. Thanks
3. (10 points) Let G be an undirected graph with nodes vi,..Vn. The adja.- cency matriz representation for G is the nx n matrix M given by: Mij-1 if there is an edge from v, to ty. and M,',-0 otherwise. A triangle is a set fvi, vjof 3 distinct vertices so that there is an edge from v, to vj, another from v to k and a third from vk to v. Give and analyze...
Recall the definition of the degree of a vertex in a graph. a)
Suppose a graph has 7 vertices, each of degree 2 or 3. Is the graph
necessarily connected ?
b) Now the graph has 7 vertices, each degree 3 or 4. Is it
necessarily connected?
My professor gave an example in class. He said triangle and a
square are graph which are not connected yet each vertex has degree
2.
(Paul Zeitz, The Art and Craft of Problem...
Question 1: Given an undirected connected graph so that every edge belongs to at least one simple cycle (a cycle is simple if be vertex appears more than once). Show that we can give a direction to every edge so that the graph will be strongly connected. Question 2: Given a graph G(V, E) a set I is an independent set if for every uv el, u #v, uv & E. A Matching is a collection of edges {ei} so...
6) Below is an adjacency matrix for an undirected graph, size n- 8. Vertices are labeled 1 to 8 Rows are labeled 1 through 8, top to bottom. Columns are labeled 1 through 8, left to right. Column labels to the right: 1 2 345 6 78 Row labels are below this: 1 0 0 1 000 0 0 2 0 0 101 1 00 (See a drippy heart?) 3 1 1 0 1 01 0 0 4 0 0...
Problem 3's picture are given below.
5. (a) Let G = (V, E) be a weighted connected undirected simple graph. For n 1, let cycles in G. Modify {e1, e2,.. . ,en} be a subset of edges (from E) that includes no Kruskal's algorithm in order to obtain a spanning tree of G that is minimal among all the spanning trees of G that include the edges e1, e2, . . . , Cn. (b) Apply your algorithm in (a)...
Answer all the BLANKS from A to N please.
7. For the graph shown below at the bottom, answer the following questions a) Is the graph directed or undirected? b) What is the deg ()? c) Is the graph connected or unconnected? If it is not connected, give an example of why not d) ls the graph below an example of a wheel? e) Any multiple edges? 0 What is the deg'(E)? ) What is the deg (B)? h) Is...
Help !! I need help with Depth-First Search using an
undirected graph.
Write a program, IN JAVA, to implement the
depth-first search algorithm using the pseudocode given.
Write a driver program, which reads input file mediumG.txt as an
undirected graph and runs
the depth-first search algorithm to find paths to all the other
vertices considering 0 as the
source. This driver program should display the paths in the
following manner:
0 to ‘v’: list of all the vertices traversed to...
Use the example Graph.javaPreview the document class and
Edge.javaPreview the document class as a starting point for this
assignment, you'll need to make your own main class to create an
instance of the Graph class.
For this assignment we are going to create a map of a city
subway system using a Graph data structure. The Metro Station Map
that you'll use for this assignment is here: Assignment 9 - Metro
Station Map.PNG
Enter all the information from the Metro...
Below is the Graph file that
needs to be modified(using Python3) :
#!/usr/bin/python3
# Simple Vertex class
class Vertex:
""" Lightweight vertex structure for a graph.
Vertices can have the following labels:
UNEXPLORED
VISITED
Assuming the element of a vertex is string type
"""
__slots__ = '_element', '_label'
def __init__(self, element, label="UNEXPLORED"):
""" Constructor. """
self._element = element
self._label = label
def element(self):
""" Return element associated with this vertex. """
return self._element
def getLabel(self):
""" Get label assigned to...