Michiya Mori

collaborators

3 papers

math.OA2024

Multiplicatively spectrum-preserving maps on $C^{*}$ -algebras

Michiya Mori, Shiho Oi

We study surjective maps between the sets of all self-adjoint elements of unital $C^{*}$ -algebras which satisfy the multiplicatively spectrum-preserving property. We show that such m…

math.OA2023

On the shape of correlation matrices for unitaries

Michiya Mori

For a positive integer $n$ , we study the collection $F_{fin} (n)$ formed of all $n \times n$ matrices whose entries $a_{ij}$ , $1 \leq i, j \leq n$ , can be written as…

math.FA2023

On the Scottish Book Problem 155 by Mazur and Sternbach

Michiya Mori

Problem 155 of the Scottish Book asks whether every bijection $U : X \to Y$ between two Banach spaces $X, Y$ with the property that, each point of $X$ has a neighborhood on whic…

Multiplicatively spectrum-preserving maps on C∗-algebras

On the shape of correlation matrices for unitaries

On the Scottish Book Problem 155 by Mazur and Sternbach

Multiplicatively spectrum-preserving maps on $C^{*}$ -algebras