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 2023 · math.FAShow all

2 papers · 2 filters

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…

math.FA2023

On the distance from a matrix to nilpotents

Michiya Mori

We prove that the distance from an $n \times n$ complex matrix $M$ to the set of nilpotents is at least $\frac{1}{2} sec \frac{π}{n + 2}$ if there is a nonzero projection $P$ such that $…