The purpose of this paper is to study the properties of the solutions to the inhomogeneous biharmonic equations:
$$\Delta (\Delta f)=g$$
, where g :
$$\overline{\mathbb {D}}\rightarrow \mathbb {C}$$
is a continuous function and
$$\overline{\mathbb {D}}$$
denotes the closure of the unit disk
$$\mathbb {D}$$
in the complex plane
$$\mathbb {C}$$
. In fact, we establish the following properties for those solutions: Firstly, we establish the Schwarz-type lemma. Secondly, by using the obtained results, we get a Landau-type th...
