Non-external Proofs of Lagrange Inversion Formula
arXiv:2605.04319
Abstract
The goal of the paper is to present two simple proofs of the Lagrange Inversion Formula for formal power series. Both proofs are non-external in the sense that they use concepts that do not go beyond the scope of basic tools of formal power series analysis.
Introduced small corrections in abstract, introduction and proof of Theorem 1.1; a reference added