Consider a real-valued function u(x, y), where x and y are real variables. For each way...
Complex anaylsis, cite all theorems used. Y are one Consider the real valued function ulx,y) with x and real variables. For each definition of ucxy) below, find whether there cette exists real-valued function v(x,y) such that f(2)= u(x, y) tivcx,y) is a function analytic in some DEC. If such such v(x,y) and determine V(X,Y) the domain of analyticity D for fcz). It such a not exist, prove that it does not exist. (i) u (x,y)= xy2-x²y (ii) ucx, y) =...
complex anaylsis Only need help on (ii) and (iii), please answer both and cite theorems used a one Consider the real valued function ulx,y). with x and y are real variables For Cach definition of ulx,y) below, find whether there Cette exists real-valued function v(x,y) such that f(2)= u(x,y) ti vex,y) is a function analytic in some DEC. If such such v(x,y) and determine the domain analyticity o for fcz). It such a not exist, prove that it does not...
Q7 Prove the real valued function in x and y given by 1) and (ii) are harmonic. Find the corresponding harmonic conjugate function and hence construct the analytic function f(z) = u(x,y) +j v (x,y) 0v(x, y) = In(y2 + x2) + x + y, z = 0 (ii) u(x,y) = y2 – x2 + 16xy
Problem 8. Let f(z) = u(x, y) iv(x, y) be an entire function with real and imaginary parts u(x, y) and v(x, y). Assume that the imaginary part is bounded v(x, y) < M for every z = x+ iy. Prove that f is a constant 1
7. Let f:D + C be a complex variable function, write f(x) = u(x, y) +iv(x,y) where z = x +iy. (a) (9 points) (1) Present an equivalent characterization(with u and v involved) for f being analytic on D. (Just write down the theorem, you don't need to prove it.) (2) Let f(z) = (4.x2 + 5x – 4y2 + 3) +i(8xy + 5y – 1). Show that f is an entrie function. (3) For the same f as above,...
2- a) The real part of a complex function f(z) given as, u(x, y) = 3x?y - y. Iff(2) is an analytic function, find v(x,y) and f(z) (15p) b) Find the whether f(z) is analytic or not where f(z) = cos(x) +ie'sinx. (15p)
Question 1. Consider these real-valued functions of two variables: T In (x2 + y2) (a) () What is the maximal domain, D, for the functions f and g? Write D in set notation. (ii) What is the range of f and g? Is either function onto? ii) Show that f is not one-to-one. (iv) Find and sketch the level sets of g with heights: z00, 2, 04 (Note: Use set notation, and draw a single contour diagram.) (v) Without finding...
Problem 6 (6 points) Let f(x) = u(x, y) + iv(x, y) be a analytic function on D and extends continuously to ad. Prove that the component function u(x, y) must attain its minimum value on aD unless u(x,y) is a constant function. (Hint: Consider the modulus of analytic function g(z) = ef(x), and apply the result in problem 5)
everywhe 4. Let f be a real-valued analytic function in a domain D. Prove that f() must be constant throughout D.
(%) = u(x, y) + f 0(4,7) For each of the following functions, write as f(z) = u(x, y) + í v(x, y) and use the Cauchy-Riemann conditions to determine whether they are analytic (and if so, in what domain) a. f(z) = 2 + 1/(2+2) b. f(z) = Re z C. f(x) = e-iz d. f(z) = ez? 16 marks]