Michiya Mori

activity

20172026

most citedTingley's problem through the facial structure of operator algebras

47 citations · 92 across the 19 of their papers we have counts for

collaborators

Showing 2024Show all

3 papers · 1 filter

math.OA2024

Determination of the distance from a projection to nilpotents

Masaki Izumi, Michiya Mori

In this note, we study the distance from an arbitrary nonzero projection $P$ to the set of nilpotents in a factor $M$ equipped with a normal faithful tracial state $τ$ . W…

math-ph2024

Optimal version of the fundamental theorem of chronogeometry

Michiya Mori, Peter Šemrl

We study lightlikeness preserving mappings from the $4$ -dimensional Minkowski spacetime $M_{4}$ to itself under no additional regularity assumptions like continuity, surjec…

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…

Determination of the distance from a projection to nilpotents

Optimal version of the fundamental theorem of chronogeometry

Multiplicatively spectrum-preserving maps on C∗-algebras

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