Shiho Oi

activity

20172026

most cited2-local isometries on function spaces

4 citations · 5 across the 15 of their papers we have counts for

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2 papers · 1 filter

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.OA2024

Non-linear characterization of Jordan $$ -isomorphisms via maps on positive cones of $C^{}$ -algebras

Osamu Hatori, Shiho Oi

We study maps between positive definite or positive semidefinite cones of unital $C^{*}$ -algebras. We describe surjective maps that preserve (1) the norm of the quotient or multiplic…

Multiplicatively spectrum-preserving maps on C∗-algebras

Non-linear characterization of Jordan ∗-isomorphisms via maps on positive cones of C∗-algebras

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

Non-linear characterization of Jordan $$ -isomorphisms via maps on positive cones of $C^{}$ -algebras