👉 Residues, in mathematics and physics, are numbers that result from a numerical integration of a function. They are often used to represent a function's behavior at specific points or values. A residue is a number that appears in an integral, typically due to the presence of a particular function within it. This function, known as the integrand, is usually a polynomial, and its coefficients determine the value of the residue. Residues are fundamental concepts in complex analysis, which deals with the behavior
