Martin Mathieu

activity

20052023

most citedC*-Segal algebras with order unit

11 citations · 29 across the 15 of their papers we have counts for

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5 papers · 1 filter

math.FA2023

Additive spectrum preserving mappings from von Neumann algebras

Martin Mathieu, Francois Schulz

We establish Jafarian's 2009 conjecture that every additive spectrum preserving mapping from a von Neumann algebra onto a semisimple Banach algebra is a Jordan isomorphism.

math.FA2018

Strictly singular multiplication operators on $L (X)$

Martin Mathieu, Pedro Tradacete

Exploiting several $ℓ_{p}$ -factorization results for strictly singular operators, we study the strict singularity of the multiplication operator $L_{A} R_{B} : T \mapsto A T B$ on $\…

math.FA2013

More elementary operators that are spectrally bounded

Nadia Boudi, Martin Mathieu

We discuss some necessary and some sufficient conditions for an elementary operator $x \mapsto \sum_{i = 1}^{n} a_{i} x b_{i}$ on a Banach algebra $A$ to be spectrally bounded. In the case of…

math.FA2011★ 3 cited

Spectral isometries on non-simple C*-algebras

Martin Mathieu, Ahmed R. Sourour

We prove that unital surjective spectral isometries on certain non-simple unital C*-algebras are Jordan isomorphisms. Along the way, we establish several general facts in the setti…

math.FA2008

A Collection of Problems on Spectrally Bounded Operators