The Laurent series is a power series representation of a complex function f: ℂ → ℂ. The series is given by with the coefficients an and c given by Cauchy's integral formula: The line integral defining the coefficients must lie on in the region of convergence, which will be between two circles centred at the point c. File:GammaAbsSmallPlot.svg This complex analysis-related article contains minimal information concerning its topic. You can help the Mathematics Wikia by adding to it.