The Frenet–Serret formulas are a set of differential equations that describe the intrinsic geometry of a space curve in three-dimensional space. They provide a way to relate the curvature and torsion of a curve to the behavior of its tangent vector, normal vector, and binormal vector. The formulas are fundamental in the study of curves in differential geometry and are named after the mathematicians Jean Frédéric Frenet and Joseph Alain Serret.
