Intrinsic Equations For a Relaxed Elastic Line of Second Kind on an Oriented Surface

Abstract

Let {\alpha}(s) be an arc on a connected oriented surface S in E3, parameterized by arc length s, with torsion {\tau} and length l. The total square torsion F of {\alpha} is defined by T=\int_{0}^{l}\tau ^{2}ds\ $. . The arc {\alpha} is called a relaxed elastic line of second kind if it is an extremal for the variational problem of minimizing the value of F within the family of all arcs of length l on S having the same initial point and initial direction as {\alpha}. In this study, we obtain differential equation and boundary conditions for a relaxed elastic line of second kind on an oriented surface.