Some results on non-commutative Banach function spaces.
A note on a class of Banach algebra-valued polynomials.
Another consequence of tanahashi’s argument on best possibility of the grand Furuta inequality
We show that Tanahashi’s argument on best possibility of the grand Furuta inequality has an additional consequence.
Isometries between groups of invertible elements in C*-algebras
We describe all surjective isometries between open subgroups of the groups of invertible elements in unital C*-algebras. As a consequence the two C*-algebras are Jordan *-isomorphic if and only if the groups of invertible elements in those C*-algebras are isometric as metric spaces.
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