If a function satisfy CR equation having continuous first order derivative then the function is entire
11. Show that following are an entire function. f(z)= e-? f(3) = cosh(z) (a) (b) 12....
Consider the following complex-variable function cosh a < T f(z) la! cosh πχ, a) Find all its singularities, state their nature and compute the residues b) Consider the rectangular contour y with vertices at tR and tRi. Evaluate 6 6 dz cosh πχ c) Using the previous result take the limit R-to prove that cosh ax (10] 2 cos (g Hint: remember that cosh(a + b) -cosh a cosh b + sinh a sinh b d) Why is the above...
Tutorial Group/Date/Time: Using the Cauchy-Riemann equations, show that f(z)-e' is fully analytic in the entire z-plane. 1. (40 marks)
Problem 7. (20 points) We consider the function tanh(z) sinh(z) tanh(z)=cosh(z) where , For any integer 0, we denote by Qe the positively oriented square whose edges lie along the lines z-t(k+1) π and y = ± (k+)π -(km 4p. (a) Show that for any z z + iy e C, |cosh(z)12-sinh2(x) + cos2(y). 2p (b) Recall that tanh is analytic at the origin and that tanh () 1 - tanh2(). Compute the tanh(z) limit l := lim (Problem 7...
Find a holomorphic function F(z) on Ω-{z I Izl < r} such that for any a E Ω, F(a) F(0)-Z dz. Suppose f(z) is entire and Ω is simply connected domain. Show lim 22-h2220 Find a holomorphic function F(z) on Ω-{z I Izl
Hw2 Q1 Show that the function f(z) = z2 + z is analytic. Also find its derivative. (Hint: check CR Equations for Analyticity, and then proceed finding the derivative as shown in video 8 by any of the two rules shown in video 7] Q2 Verify that the following functions are harmonic i. u = x2 - y2 + 2x - y. ii. v=e* cos y. Q3 Verify that the given function is harmonic, and find the harmonic conjugate function...
Consider the complex functions given below: a) f(z) z,(z # 0) b) f(z)1, (0) c) f()22 d)f(2)1/(z+1), (z ) Verify that the Cauchy-Riemann equations are satisfied, and evaluate f (z) expression using the basic definition of derivative operation based on the limiting case as lim Az-0 Consider the complex functions given below: a) f(z) z,(z # 0) b) f(z)1, (0) c) f()22 d)f(2)1/(z+1), (z ) Verify that the Cauchy-Riemann equations are satisfied, and evaluate f (z) expression using the basic...
Consider the complex functions given below: a) f(z) z,(z # 0) b) f(z)1, (0) c) f()22 d)f(2)1/(z+1), (z ) Verify that the Cauchy-Riemann equations are satisfied, and evaluate f (z) expression using the basic definition of derivative operation based on the limiting case as lim Az-0
Q5. a) Let f(z) be an analytic function on a connected open set D. If there are two constants and C, EC, not all zero, such that cf(z)+ f(2)=0 for all z € D, then show that f(z) is [4] a constant on D. b) Evaluate the contour integral f(z)dz using the parametric representations for C, where f(2)= and the curve C is the right hand half circle 1z| = 2, from z=-2 to z=2i. [4] c) Evaluate the contour...
9 and 11 please 2-11 CAUCHY-RIEMANN EQUATIONS Are the following functions analytic? Use (1) or (7). 2. f(z) = izz 3. f(z) = e -2,0 (cos 2y – i sin 2y) 4. f(x) = e« (cos y – i sin y) 5. f(z) = Re (z?) – i Im (32) 6. f(x) = 1/(z – 25) 7. f(x) = i/28 8. f(z) = Arg 2TZ 9. f(z) = 3772/(23 + 4722) 10. f(x) = ln [z] + i Arg z...
Please show all work thanks (14) 1. This problem investigates the iterated integral I - Jxdy dz. . a) Compute I. b) Use the axes to the right to sketch the region of integration for I c) Write I as a sum of one or more dz dy integrals. You do not need to compute the result! 4 (10) 2. Find and classify using the Second Derivative Test all critical points of f(x, y)2 Resembling problem 19 in section 14.7...