Minghui Ma

collaborators

4 papers

math.OA2026

The similarity of irreducible operators in factors

Minghui Ma, Rui Shi, Shanshan Yang

An operator $T$ in a separable factor $M$ is said to be irreducible in $M$ if the von Neumann subalgebra $W^{*} (T)$ generated by $T$ is an irreducible subfactor o…

math.OA2026

Operators with disconnected spectrum in von Neumann algebras

Minghui Ma, Rui Shi, Tianze Wang

Let $M$ be a von Neumann algebra, $I$ a weak-operator dense ideal in $M$ , and $I^¦$ a unitarily invariant $∥ \cdot ∥$ -dominating norm on $I$ .…

math.OA2025

Irreducible operators in von Neumann algebras

Sukitha Adappa, Minghui Ma, Junhao Shen +2

Let $M$ be a separable von Neumann algebra with center $Z (M)$ . An operator $T$ in $M$ is called irreducible if the von Neumann algebra $W^*(…

math.OA2025

Free semigroupoid algebras and the first cohomology groups

Linzhe Huang, Minghui Ma

This paper investigates derivations of the free semigroupoid algebra $L_{G}$ of a countable or uncountable directed graph $G$ and its norm-closed version, the tensor algeb…