Analysis of information sources in references of the Wikipedia article "பகுமுறைச் சார்பு" in Tamil language version.
A function f of the complex variable z is analytic at point z0 if its derivative exists not only at z but at each point z in some neighborhood of z0. It is analytic in a region R if it is analytic at every point in R. The term holomorphic is also used in the literature do denote analyticity
