47 citations · 92 across the 19 of their papers we have counts for
19 papers
Isometries between C-algebras with finite corank
Michiya Mori
We give a characterization of linear isometries with finite corank between two arbitrary unital C-algebras in terms of Jordan -homomorphisms and ``finite-dimensional remain…
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 to the set of nilpotents in a factor equipped with a normal faithful tracial state . W…
Optimal version of the fundamental theorem of chronogeometry
Michiya Mori, Peter Šemrl
We study lightlikeness preserving mappings from the -dimensional Minkowski spacetime to itself under no additional regularity assumptions like continuity, surjec…
Multiplicatively spectrum-preserving maps on -algebras
Michiya Mori, Shiho Oi
We study surjective maps between the sets of all self-adjoint elements of unital -algebras which satisfy the multiplicatively spectrum-preserving property. We show that such m…
On the shape of correlation matrices for unitaries
Michiya Mori
For a positive integer , we study the collection formed of all matrices whose entries , , can be written as…
On the Scottish Book Problem 155 by Mazur and Sternbach
Michiya Mori
Problem 155 of the Scottish Book asks whether every bijection between two Banach spaces with the property that, each point of has a neighborhood on whic…