The Degree-Three Bounded Cohomology of Complex Lie Groups of Classical Type
Group Theory
2023-10-10 v2 K-Theory and Homology
Abstract
We establish Monod's isomorphism conjecture in degree-three bounded cohomology for every complex simple Lie group of classical type. Our main ingredient is a bounded-cohomological stability theorem with an optimal range in degree three that we bootstrap from previous stability results by the author and Hartnick. The bootstrapping procedure relies on the occurrence in our setting of a variant of the recently observed phenomenon of secondary stability in the sense of Galatius--Kupers--Randal-Williams.
Keywords
Cite
@article{arxiv.2304.00607,
title = {The Degree-Three Bounded Cohomology of Complex Lie Groups of Classical Type},
author = {Carlos De la Cruz Mengual},
journal= {arXiv preprint arXiv:2304.00607},
year = {2023}
}
Comments
Added norm computations and relevant references, and modified introduction and general structure for better readability. 33 pages. Comments welcome