 Essential singularity

An **essential singularity** is a type of singular point in complex analysis that has specific properties. In a complex function \( f(z) \), a point \( z_0 \) is considered an essential singularity if the function behaves in a particularly wild manner as \( z \) approaches \( z_0 \). To understand this concept better, it's helpful to refer to the classification of singularities for complex functions.