Ebrahim Samei

activity

20072026

most citedBiflatness and Pseudo-Amenability of Segal algebras

29 citations · 147 across the 26 of their papers we have counts for

collaborators

36 papers

math.OA2026

Amenable traces and the joint numerical radius

Vern I. Paulsen, Mizanur Rahaman, Ebrahim Samei

We provide necessary and sufficient characterizations of the existence of an amenable trace on a C $^{*}$ -algebra in terms of the joint free numerical radius of tuples of unitaries, i…

math.FA2026

Multipliers of Beurling-Fourier algebras

Mahmood Alaghmandan, Olof Giselsson, Ebrahim Samei +1

For a locally compact group G we introduce and study the reduced Beurling-Fourier-Stieltjes algebra, a weighted analogue of the reduced Fourier-Stieltjes algebra, together with the…

math.OA2026

Crossed product functors associated to $ℓ^{p}$ -pseudofunctions

Jacek Krajczok, Ebrahim Samei, Timo Siebenand +1

We show that the $ℓ^{p}$ -pseudofunctions, which were recently shown to lead to exotic completions of group $C^{*}$ -algebras by Wiersma and the second named author, can be used to co…

math.DS2024

Entropies and Poisson boundaries of random walks on groups with rapid decay

Benjamin Anderson-Sackaney, Tim de Laat, Ebrahim Samei +1

Let $G$ be a countable group and $μ$ a probability measure on $G$ . We build a new framework to compute asymptotic quantities associated with the $μ$ -random walk on $G$ , using metho…

math.OA2023

New tensor products of C-algebras and characterization of type I C-algebras as rigidly symmetric C*-algebras

Hun Hee Lee, Ebrahim Samei, Matthew Wiersma

We construct several new classes of bifunctors $(A, B) \mapsto A \otimes_{α} B$ , where $A \otimes_{α} B$ is a cross norm completion of $A ⊙ B$ for each pair of C*-algebras $A$ and $B$ . F…

math.FA2018

Norm-controlled inversion in weighted convolution algebras

Ebrahim Samei, Varvara Shepelska

Let $G$ be a discrete group, let $p \geq 1$ , and let $ω$ be a weight on $G$ . Using the approach from [9], we provide sufficient conditions on a weight $ω$ for $ℓ^{p} (G, ω)$ to be a Ba…