Let f(z) be an entire function of exponential type τ, with f(x) real and |f(x)|≦M on the real axis. The author uses an interpolation series to prove the inequality of Duffin and Schaeffer, |f(x+iy)| ≦ ...

Mathematica Scandinavica has been published regularly since 1953. Mathematica Scandinavica is a non-profit company, which is operated by the five mathematical societies in Scandinavia. It is the aim ...