Representation homology of topological spaces

Y Berest, AC Ramadoss… - International Mathematics …, 2022 - academic.oup.com
In this paper, we introduce and study representation homology of topological spaces, which
is a natural homological extension of representation varieties of fundamental groups. We …

Representation homology of simply connected spaces

Y Berest, AC Ramadoss, WK Yeung - Journal of Topology, 2022 - Wiley Online Library
Let GG be an affine algebraic group defined over a field kk of characteristic 0. We study the
derived moduli space of GG‐local systems on a pointed connected CW complex XX …

[PDF][PDF] Derived character maps of group representations

Y Berest, AC Ramadoss - Preprint, 2022 - math.indiana.edu
In this paper, we define and study derived character maps of finite-dimensional
representations of homotopy simplicial groups, which are homotopy algebras over the …

Commuting Varieties of Upper Triangular Matrices and Representation Homology

G Li - arXiv preprint arXiv:2403.13953, 2024 - arxiv.org
We establish a connection between commuting varieties $ C_g (G) $(potentially of higher
genus), which are associated with a group scheme $ G $ consisting of upper triangular …

Derived character maps of group representations

Y Berest, AC Ramadoss - Algebraic & Geometric Topology, 2024 - msp.org
We define and study (derived) character maps of finite-dimensional representations of∞–
groups. As models for∞–groups we take homotopy simplicial groups, ie the homotopy …

[PDF][PDF] Representation homology and strong Macdonald conjectures

Y Berest - math.berkeley.edu
Let g be a finite-dimensional reductive Lie algebra (over R or C), h⊆ g its Cartan
subalgebra, R⊂ h∗ a root system of g, Q= Q (R), the root lattice (spanned by R). Write the …