Forrest Glebe

collaborators

4 papers

math.KT2025

On Chern classes of almost representations

Marius Dadarlat, Forrest Glebe

For a discrete group $Γ$ , we study vector bundles $E_{ρ}$ on compact subsets of $B Γ$ associated to almost representations $ρ : Γ \to U (n)$ . We compute the first Chern class of $E_{ρ}$ in…

math.OA2025

Vanishing of Topological Invariants For Unnormalized Schatten $p$ multiplicative Maps

Forrest Glebe

A result of Dadarlat shows that nonzero even rational cohomology obstructs the matricial stability of many discrete groups. In the author's previous work, 2-cohomology is used to a…

math.OA2025

Central extensions and almost representations

Marius Dadarlat, Forrest Glebe

For a sequence of unital tracial $C^{*}$ -algebras $(A_{n}, τ_{n}),$ we construct a canonical central extension of the unitary group $U (ℓ^{\infty} (N, A_{n}) / c_{0} (N, A_{n}))$ b…

math.CO2019

Enumerating linear systems on graphs

Sarah Brauner, Forrest Glebe, David Perkinson

The divisor theory of graphs views a finite connected graph $G$ as a discrete version of a Riemann surface. Divisors on $G$ are formal integral combinations of the vertices of $G$ ,…

On Chern classes of almost representations

Vanishing of Topological Invariants For Unnormalized Schatten p multiplicative Maps

Central extensions and almost representations

Enumerating linear systems on graphs

Vanishing of Topological Invariants For Unnormalized Schatten $p$ multiplicative Maps