Extending and correcting some research results on minimal and harmonic surfaces Original Research Article

In this article, we give necessary and beneficial extension for several important theorems by Monterde et al. on minimal and harmonic surfaces, so that they can be applied to all generic situations for image (image or image) Bézier surfaces, instead of the special case of image Bézier surfaces. At the same time, we point out the errors in Monterde et al.ʼs six papers, and give the correct and precise answers.