For the digraph shown in Fig. 8-25, find
a. the indegree and outdegree of A.
b. the indegree and outdegree of B.
c. the indegree and outdegree of D.
d. the sum of the indegrees of all the vertices.
e. the sum of the outdegrees of all the vertices.
Figure 8-25
(a)
To find:
The in degree and out degree of A in the given digraph.
Answer to Problem 1E
Solution:
The in degree of A is 3 and out degree of A is 2.
Explanation of Solution
Given:
The given digraph is shown in figure (1).
Figure (1)
Definitions:
Arc:
An arc
Indegree:
For a vertex Y, the number of arcs having Y as their ending vertex is called indegree.
Outdegree:
For a vertex X, the number of arcs having X as their starting vertex is called outdegree.
Calculation:
From figure (1) it can be noticed that there are 3 arcs having their ending vertex as A and 2 arcs having their starting vertex as A.
So, the indegree of A is 3 and outdegree of A is 2.
Conclusion:
Thus, the indegree of A is 3 and outdegree of A is 2.
(b)
To find:
The in degree and out degree of B in the given digraph.
Answer to Problem 1E
Solution:
The in degree of B is 2 and out degree of B is 2.
Explanation of Solution
Given:
The given digraph is shown in figure (2).
Figure (2)
Definitions:
Arc:
An arc
Indegree:
For a vertex Y, the number of arcs having Y as their ending vertex is called indegree.
Outdegree:
For a vertex X, the number of arcs having X as their starting vertex is called outdegree.
Calculation:
From figure (2) it can be noticed that there are 2 arcs having their ending vertex as B and 2 arcs having their starting vertex as B.
So, the indegree of B is 2 and outdegree of A is 2.
Conclusion:
Thus, the indegree of B is 2 and outdegree of B is 2.
(c)
To find:
The in degree and out degree of D in the given digraph.
Answer to Problem 1E
Solution:
The in degree of D is 3 and out degree of D is 0.
Explanation of Solution
Given:
The given digraph is shown in figure (3).
Figure (3)
Definitions:
Arc:
An arc
Indegree:
For a vertex Y, the number of arcs having Y as their ending vertex is called indegree.
Outdegree:
For a vertex X, the number of arcs having X as their starting vertex is called outdegree.
Calculation:
From figure (3) it can be noticed that there are 3 arcs having their ending vertex as D and no arc having their starting vertex as D.
So, the indegree of D is 3 and outdegree of D is 0.
Conclusion:
Thus, the indegree of D is 3 and outdegree of D is 0.
(d)
To find:
The sum of the in degrees of all the vertices.
Answer to Problem 1E
Solution:
The sum of all the indegrees is 10.
Explanation of Solution
Given:
The given digraph is shown in figure (4).
Figure (4)
Definitions:
Arc:
An arc
Indegree:
For a vertex Y, the number of arcs having Y as their ending vertex is called indegree.
Outdegree:
For a vertex X, the number of arcs having X as their starting vertex is called outdegree.
Calculation:
From figure (4) it can be noticed that there total 10 arcs, so there will be total 10 indegrees for all the vertices.
Conclusion:
Thus, the sum of all the indegrees is 10.
(e)
To find:
The sum of the out degrees of all the vertices.
Answer to Problem 1E
Solution:
The sum of all the outdegrees is 10.
Explanation of Solution
Given:
The given digraph is shown in figure (5).
Figure (5)
Definitions:
Arc:
An arc
Indegree:
For a vertex Y, the number of arcs having Y as their ending vertex is called indegree.
Outdegree:
For a vertex X, the number of arcs having X as their starting vertex is called outdegree.
Calculation:
From figure (5) it can be noticed that there total 10 arcs, so there will be total 10 outdegrees for all the vertices.
Conclusion:
Thus, the sum of all the outdegrees is 10.
Want to see more full solutions like this?
Chapter 8 Solutions
EXCURSIONS IN MOD.MATH W/ACCESS >BI<
- Examples: Solve the following differential equation using Laplace transform (e) ty"-ty+y=0 with y(0) = 0, and y'(0) = 1arrow_forwardExamples: Solve the following differential equation using Laplace transform (a) y" +2y+y=t with y(0) = 0, and y'(0) = 1arrow_forwardTemperature for Sudbury (degrees Celsius) 3. The following table gives the mean monthly temperatures for Sudbury, Ontario and Windsor, Ontario. Each month is represented by the day of the year in the middle of the month. Month Day of Year Temperature for Windsor (degrees Celsius) January 15 -13.7 -4.7 February 45 -11.9 -3.8 March 75 -5.9 2.3 April 106 3.0 8.7 May 136 10.6 14.6 June 167 15.8 20.2 July 197 18.9 22.6 August 228 17.4 22.0 September 259 12.2 17.9 October 289 6.2 11.5 November 320 -1.2 4.8 December 350 -10.1 -1.2 a) Create a scatter plot of temperature vs. day of the year for each city. b) Draw the curve of best fit for each graph. c) Use your graphs to estimate when the temperature increases fastest, for each set of temperature data. Explain how you determined these values. d) Use your graphs to estimate the rate at which the temperature is increasing at the two times from question 3. e) Determine an equation of a sinusoidal function to model the data for each cityarrow_forward
- . Solve the equation for x ; tanh x = 3/5 .arrow_forwardIf is a scalar or invariant, , are vectors then is a mixed tensor of type (2, 1).arrow_forwardProve that the Abomian Method (ABM) and homotopy Method (HPM) are equivalent for solving nonlinear dis Serential equations. What the relationship between AdoMian (ADM) and Dafter Dar Jafari Method.arrow_forward
- What is the relationship between AdoMian decompoition method and homotopy Perturaba tion method with prove?arrow_forwardQuestion 3 [10 marks]. Suppose that X, Y and Z are statistically independent random variables, each of them with a x²(2) distribution. (a) Find the moment generating function of U = X + 3Y + Z. State clearly and justify all steps taken. (b) Calculate the expectation E(U) using the moment generating function.arrow_forwardPlease could you explain why 0.5 was added to each upper limpit of the intervals.Thanksarrow_forward
- College Algebra (MindTap Course List)AlgebraISBN:9781305652231Author:R. David Gustafson, Jeff HughesPublisher:Cengage LearningTrigonometry (MindTap Course List)TrigonometryISBN:9781337278461Author:Ron LarsonPublisher:Cengage Learning
- Intermediate AlgebraAlgebraISBN:9781285195728Author:Jerome E. Kaufmann, Karen L. SchwittersPublisher:Cengage LearningHolt Mcdougal Larson Pre-algebra: Student Edition...AlgebraISBN:9780547587776Author:HOLT MCDOUGALPublisher:HOLT MCDOUGALAlgebra: Structure And Method, Book 1AlgebraISBN:9780395977224Author:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. ColePublisher:McDougal Littell