Underlying varieties and group structures
arXiv:2105.12861
Abstract
We explore to what extent the underlying variety of a connected algebraic group or the underlying manifold of a real Lie group determines its group structure.
The introduction rewritten, several new results (Lemma 9, Theorems 10, 12, 15, 16) added, the list of questions in Section 9 expanded, the text reflowed, and some typos corrected. 25 pages