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Reference.org
Lagrange inversion theorem
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<p>In <a href="/facts/Mathematical_analysis/XXeR26Ih">mathematical analysis</a>, the Lagrange inversion theorem, also known as the Lagrange–Bürmann formula, gives the <a href="/facts/Taylor_series/M0aTuftH">Taylor series</a> expansion of the <a href="/facts/Inverse_function/Tg5nnXlu">inverse function</a> of an <a href="/facts/Analytic_function/JhL3z8FP">analytic function</a>. Lagrange inversion is a special case of the <a href="/facts/Inverse_function_theorem/pIwcyc6X">inverse function theorem</a>. </p>