1549312215-Complex_Analysis_for_Mathematics_and_Engineering_5th_edition__Mathews

12. 2 • THE DIRICHLET PROBLEM FOR THE UNIT D I SK 525

We now turn to the proof Theorem 12.7. The real-valued function

1 - r^2

p (r, t -^9 ) = 1 +_r_2 -- -2-r -cos-(t--- 8-)