2005/10/07 by Matthias Franz, Volker Puppe
Mathematics · #Advanced Combinatorial Mathematics #Advanced Topics in Algebra #Mathematics and Applications #math.AT #msc:14P25 #msc:55M35 #msc:55N91 #msc:55S10
paper · pdf · doi:10.1016/j.crma.2005.12.012
published as C. R. Acad. Sci. Paris, Ser. I 342 (2006), 187-190 · 4 pages
arxiv created 2005/10/07 · openalex publication_date 2005/12/28 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We prove that the coefficients of the so-called conjugation equation for conjugation spaces in the sense of Hausmann–Holm–Puppe are completely determined by Steenrod squares. This generalises a result of V.A. Krasnov for certain complex algebraic varieties. It also leads to a generalisation of a formula given by Borel and Haefliger, thereby largely answering an old question of theirs in the affirmative.