The Frenet–Serret formula is a formula describing the kinematic properties of a particle moving along a parametric curve. The formulas represent the derivatives of the function in terms of the basis formed by the tangent, normal, and binormal unit vectors. In matrix form, it is written as with κ and τ representing the curvature and torsion, respectively. File:Hyperbolic triangle.svg This differential geometry-related article contains minimal information concerning its topic. You can help the Mathematics Wikia by adding to it.