Verify that each given function u is harmonic (in the region where it is defined), then find a harmonic conjugate of u and the analytic function f(z) whose real part is u:   ) u = sin x cosh y (e) u = Im e z 2

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
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Verify that each given function u is harmonic (in the region where it is defined), then find a

harmonic conjugate of u and the analytic function f(z) whose real part is u:

 

) u = sin x cosh y

(e) u = Im e

z

2

(d) u = sin x cosh y
(e) u =
Im e²²
3. Show that if v is a harmonic conjugate for u, then -u is a harmonic conjugate for v.
4. Show that if v is a harmonic conjugate of u in a domain D, then uv is harmonic in D.
y
5. Find an analytic function f(z) whose imaginary part is given by v(x, y) = y.
Transcribed Image Text:(d) u = sin x cosh y (e) u = Im e²² 3. Show that if v is a harmonic conjugate for u, then -u is a harmonic conjugate for v. 4. Show that if v is a harmonic conjugate of u in a domain D, then uv is harmonic in D. y 5. Find an analytic function f(z) whose imaginary part is given by v(x, y) = y.
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