👉 An immersion is a special type of mapping between two surfaces in space, where one surface is embedded in the other. Specifically, an immersion is defined as a continuous function from one surface to another that preserves orientation and has a finite number of critical points (points at which the function changes sign). An immersed surface is a surface with no corners or cusps, meaning it can be easily described by a parametric equation. In mathematics and physics, immersions are used extensively in the study of geodes