Description:nz) = aeb', f(z) = a(ei"-e"i) where a, b, c, and of this paper. O American
Mathematical Society 1977 Âlander subsequently devoted a series of papers
to Pólya's question. In [1] Álander's "proof" involves a study of level curves of
harmonic functions transi., Transi. Math. Monographs, vol.