2026/07/21 by Mikhail Borovoi, Willem A. de Graaf, Robert M. Guralnick
#math.RA #math.RT
Following an idea of Demarche and using computer calculations of the authors and ideas of LLM Claude Fable, we construct an explicit 10-dimensional complex two-step nilpotent Lie algebra that is isomorphic to its complex conjugate but cannot be defined over the field of real numbers R.