[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 …

Symmetric homology and representation homology

Y Berest, A Ramadoss - Transactions of the American Mathematical …, 2023 - ams.org
Symmetric homology is a natural generalization of cyclic homology, in which symmetric
groups play the role of cyclic groups. In the case of associative algebras, the symmetric …

A Step towards Computational Derived Algebraic Geometry: The RepHomology Package For Macaulay2

G Li - arXiv preprint arXiv:2410.18383, 2024 - arxiv.org
We introduce the\verb| Macaulay2| package\verb| RepHomology| for the computations of
representation homology of certain spaces. The main methods implement computing the …

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 …