Problem 3 (8 points each) Let's see a simple example of the method of characteristics in...
Fantastic news! We've Found the answer you've been seeking!
Question:
Transcribed Image Text:
Problem 3 (8 points each) Let's see a simple example of the method of characteristics in higher dimension. Let w ER be a constant, and let u = u(x, y, t) satisfy the PDE Uz - xUz + YUy = 0 u(x, y,0) = f(x,y) (a) Given arbitrary initial conditions E, CER, solve the characteristic equations d [3]=5158] [*]=[] dr to find the characteristics = (E. C, T) and y = y(§. 5,7). Sketch a few of the tra- jectories in the zy-plane. Then, use the multivariable chain rule, along with t = 7, to find the PDE and initial conditions satisfied by U, where U(E.S.T) = u(x(E, S, T). y(E. C. T), t(E, S. T)) Applied PDE, Section B Spring 2023 (b) Use the PDE you found in (a) to find the solution u(x, y, t) in terms of the initial data f(x, y). Then, suppose f(x,y) = x² + y². Sketch a few level sets of u(x, y,0) and u(x, y, 1) in the ry-plane, and describe the shape of the level sets (i.e. are they circles, squares, etc...) Problem 3 (8 points each) Let's see a simple example of the method of characteristics in higher dimension. Let w ER be a constant, and let u = u(x, y, t) satisfy the PDE Uz - xUz + YUy = 0 u(x, y,0) = f(x,y) (a) Given arbitrary initial conditions E, CER, solve the characteristic equations d [3]=5158] [*]=[] dr to find the characteristics = (E. C, T) and y = y(§. 5,7). Sketch a few of the tra- jectories in the zy-plane. Then, use the multivariable chain rule, along with t = 7, to find the PDE and initial conditions satisfied by U, where U(E.S.T) = u(x(E, S, T). y(E. C. T), t(E, S. T)) Applied PDE, Section B Spring 2023 (b) Use the PDE you found in (a) to find the solution u(x, y, t) in terms of the initial data f(x, y). Then, suppose f(x,y) = x² + y². Sketch a few level sets of u(x, y,0) and u(x, y, 1) in the ry-plane, and describe the shape of the level sets (i.e. are they circles, squares, etc...)
Expert Answer:
Related Book For
Income Tax Fundamentals 2013
ISBN: 9781285586618
31st Edition
Authors: Gerald E. Whittenburg, Martha Altus Buller, Steven L Gill
Posted Date:
Students also viewed these finance questions
-
Evaluate the indefinite integral ftan (a) sec" ()da Show your work: Show all work for evaluating the integral. You can either write the work by hand and attach a picture, or type your work directly...
-
The following additional information is available for the Dr. Ivan and Irene Incisor family from Chapters 1-5. Ivan's grandfather died and left a portfolio of municipal bonds. In 2012, they pay Ivan...
-
The following additional information is available for the Dr. Ivan and Irene Incisor family from Chapters 1-6. On December 12, Irene purchased the building where her store is located. She paid...
-
Following is the condensed balance sheet of Martinez, O'Neill and Clemens, partners who share profits or losses in the ratio of 2 : 3 : 5. Cash $50,000 Liabilities $200,000 Other assets 1,050,000...
-
What is a modified wage plan?
-
Coco S.A. supplies a range of computer hardware and software to 2000 schools within a large municipal region of Spain. When Coco S.A. won the contract the issue of customer service was considered to...
-
What is the purpose of practice aids in forensic and valuation services?
-
The bank portion of the bank reconciliation for Rintala Company at November 30, 2014, was as follows. The adjusted cash balance per bank agreed with the cash balance per books at November 30. The...
-
Consider eight threads (T1-T8) that are synchronized using Semaphores. Each thread has a critical section that is constrained to execute according to the following precedence relation: T2, T3 and T4...
-
Roberta Santos, age 41, is single and lives at 120 San-borne Avenue, Springfield, IL 60781. Her Social Security number is 123-45-6789. Roberta has been divorced from her former husband, Wayne, for...
-
We have the following model of the economy: ( 1 ) Y = C + S + T (7) G = GA ( 2 ) E = C + I + G (8) T = TA ( 3 ) Y = E (9) YD = Y - T ( 4 ) C = c(YD, CA) (10) Deficit = G - T ( 5 ) S = s(YD, SA) ( 6 )...
-
Which of the following is used to alert the user of a forecasting model that a significant error occurred in one of the periods? a. a seasonal index b. a smoothing constant c. a tracking signal d. a...
-
The percentage of the variation in the dependent variable that is explained by a regression equation is measured by a. the coefficient of correlation. b. the MSE. c. the coefficient of determination....
-
How do we use qualitative variables in predicting the value variable Y?
-
The best regression line is defined as the one with the a. minimum sum of the squared error. b. maximum sum of the squared error. c. average of the squared error. d. none of the above.
-
Sales for a company are typically higher in the summer months than in the winter months. This variation would be called a a. trend. b. seasonal factor. c. random factor. d. cyclical factor.
-
A labor union undertakes a training program for its members. The objective of the training program is to a. increase substitute factor prices. b. increase the marginal physical product of its members...
-
What services are provided by the provincial and territorial governments?
-
Kathy Kennedy (age 44) is a single taxpayer and she lives at 212 North Pine Way, Payson, AZ 85541. Her Social Security number is 467-98-9784. Kathy's earnings and income tax withholding as the...
-
Frederick (Freddy) Freeweights (age 42) owns and operates a health club called ''Treadmills West.'' The business is located at 4321 Arnold Street, Alpine, CA 91901. Freddy had the following income...
-
Emily Jackson (Social Security number 765-12-4326) and James Stewart (Social Security number 466-74-9932) are partners in a partnership that owns and operates a barber shop. The partnership's first...
-
In the January 1, 20X8, consolidated balance sheet, the amount of goodwill reported should be a. $0. b. $76,000. c. $95,000. d. $156,000. On January 1, 20X8, Ritt Corporation acquired 80 percent of...
-
In the December 31, 20X8, consolidated balance sheet, the amount of noncontrolling interest reported should be a. $200,000. b. $239,000. c. $251,000. d. $252,000. On January 1, 20X8, Ritt Corporation...
-
On January 1, 20X5, Post Company acquired an 80 percent investment in Stake Company. The acquisition cost was equal to Posts equity in Stakes net assets at that date. On January 1, 20X5, Post and...
Study smarter with the SolutionInn App