%0 Journal Article %T On the Invariant Theory of Weingarten Surfaces in Euclidean Space %A Georgi Ganchev %A Vesselka Mihova %J Mathematics %D 2008 %I arXiv %R 10.1088/1751-8113/43/40/405210 %X We prove that any strongly regular Weingarten surface in Euclidean space carries locally geometric principal parameters. The basic theorem states that any strongly regular Weingarten surface is determined up to a motion by its structural functions and the normal curvature function satisfying a geometric differential equation. We apply these results to the special Weingarten surfaces: minimal surfaces, surfaces of constant mean curvature and surfaces of constant Gauss curvature. %U http://arxiv.org/abs/0802.2191v1