👉 In mathematics, a contour line is a path that joins two points on a curve. It is used to define a surface in three-dimensional space or a limit cycle of a dynamical system. A contour line can be thought of as an approximation of the actual path followed by a particle moving along a curve. For instance, if we have a curve defined by a function f(x,y,z) and we want to find its contour lines, we would imagine that each point on the curve is at some
