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{{Short description|Formula for inverting a Taylor series}}
{{for|the formal power series expansion of certain implicitly defined functions|Lagrange reversion theorem}}
In [[mathematical analysis]], the '''Lagrange inversion theorem''', also known as the '''Lagrange–Bürmann formula''', gives the [[Taylor series]] expansion of the [[inverse function]] of an [[analytic function]]. Lagrange inversion is a special case of the [[inverse function theorem]].
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