Entire Functions on Lie Groups

Abstract

Every Lie group $G$ carries a distinguished algebra of particularly well-behaved real-analytic mappings: The entire functions $\mathcal{E}(G)$. They were introduced for the purposes of strict deformation quantization. This paper establishes a one-to-one correspondence between entire functions and holomorphic mappings $\mathcal{H}(G_{\mathbb{C}})$ on the universal complexification $G_{\mathbb{C}}$ of $G$ as Fréchet algebras. Methodically, this is achieved by porting aspects of classical complex analysis into a left-invariant guise and by studying the geometry of $G_{\mathbb{C}}$. As a byproduct, we obtain a strict deformation quantization of the holomorphic cotangent bundle of any universal complexification.

26 pages, based on Chapter 3 of the PhD Thesis arXiv:2504.12862, follow-up to arXiv:2107.14624