This is a preview. Log in through your library . Abstract The theorem in this paper shows that the number of real simple zeros of a function of the form f(x) = q(x) + ax + b, x ∈ R, for not too wild q ...

Extending a result of Khavinson and $\acute{S}wi\cedil{a}tek$ (2003) we show that the rational harmonic function $\overline {r(z)} - z$, where r(z) is a rational function of degree n > 1, has no more ...