N. Spronk

collaborators

3 papers

math.FA2026

(Generalized) Spine Subalgebras of Fourier-Stieltjes algebras and their Homomorphisms

Nico Spronk, Ross Stokke, Aasaimani Thamizhazhagan

For any upper semilattice $D$ of locally precompact topologies on a locally compact group $G$ , we define an associated generalized spine subalgebra $A_{D}^{*} (G)$ of the…

math.FA2026

On operator Connes-amenability of the Fourier-Stieltjes algebra

Volker Runde, Nico Spronk, Matthew Wiersma

Runde and Spronk showed in 2004 that there are non-amenable groups $G$ , including $F_{2}$ , {whose Fourier-Stieltjes algebra, $B (G)$ ,} is operator Connes-amenable. This result…

math.RT2024

On $L^{1}$ - $L^{2}$ dichotomy for flat symmetric spaces

Sanjeev Kumar Gupta, Nico Spronk

For rank 1 flat symmetric spaces, continuous orbital measures admit absolutely continuous convolution squares, except for Cartan type AI. Hence $L^{1}$ - $L^{2}$ dichotomy for these spac…

(Generalized) Spine Subalgebras of Fourier-Stieltjes algebras and their Homomorphisms

On operator Connes-amenability of the Fourier-Stieltjes algebra

On L1-L2 dichotomy for flat symmetric spaces

On $L^{1}$ - $L^{2}$ dichotomy for flat symmetric spaces