M. Caspers

activity

20152026

most citedAbsence of Cartan subalgebras for right-angled Hecke von Neumann algebras

9 citations · 19 across the 22 of their papers we have counts for

collaborators

24 papers

math.OA2026

Strongly convergent matrix models for $q$ -Gaussian algebras

Martijn Caspers, Enli Chen

We construct strongly convergent finite-dimensional random matrix models for finite $q$ -Gaussian family in the range $∣ q ∣ < 2 - 1$ . The construction has two stages.…

math.FA2025

On the best constants of Schur multipliers of higher order divided difference functions

Martijn Caspers, Jesse Reimann

Let $f \in C^{n} (R)$ be such that $∥ f^{(n)} ∥_{\infty} < \infty$ . Let $f^{[n]} \in C (R^{n + 1})$ be the $n$ th order divided difference. A special case of our m…

math.FA2025

Higher order perturbation estimates in quasi-Banach Schatten spaces through wavelets

Martijn Caspers, Emiel Huisman

Let $n \in N_{\geq 1}$ . Let $1 \leq p_{1}, \dots, p_{n} < \infty$ and set the Hölder combination $p := (p_{1}; \dots; p_{n}) := (\sum_{j = 1}^{n} p_{j}^{- 1})^{- 1}$ . Assu…

math.OA2025

Internal graphs of graph products of hyperfinite II $_{1}$ -factors

Martijn Caspers, Enli Chen

In this paper, we show that for a graph $Γ$ from a class named H-rigid graphs, its subgraph $Int (Γ)$ , named the internal graph of $Γ$ , is an isomorphism invariant of the grap…

math.OA2024

Rigid Graph Products

Matthijs Borst, Martijn Caspers, Enli Chen

We prove rigidity properties for von Neumann algebraic graph products. We introduce the notion of rigid graphs and define a class of II $_{1}$ -factors named $C_{Rigid}$ .…

math.CA2024

On the best constants of Schur multipliers of second order divided difference functions