Lagrange Inversion
Wildon's Weblog 2018-03-12
Summary:
In this post I’ll give two short proofs of the Lagrange Inversion formula, both based on the ideas in these notes. The first uses nothing more than Cauchy’s Integral Formula, and Cauchy’s Theorem to justify a change of variable. Rather than use Rouché’s Theorem, or the Open Mapping Theorem, as in the linked notes, I’ve […]