Cauchy's integral formula facts for kids
In mathematics, Cauchy's integral formula is a central statement in complex analysis. The statement is named after Augustin-Louis Cauchy. It expresses the fact that a holomorphic function defined on a disk is completely determined by its values on the boundary of the disk. The statement also provides integral formulas for all derivatives of a holomorphic function. Cauchy's formula shows that, in complex analysis, "differentiation is equivalent to integration": complex differentiation, like integration, behaves well under uniform limits – a result denied in real analysis.
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