👉 In mathematics, a stephanian function is defined as a holomorphic function on an open subset of the complex plane that satisfies certain properties. It is named after Georg Friedrich Bernhard Stephan, who first introduced this concept in 1915. Stephanian functions are characterized by their singularities at isolated points, which can be either poles or essential singularities. They have many applications in analysis and mathematical physics, particularly in the study of differential equations and the construction of various classes of hol
