Fatmah B. Jamjoom

collaborators

2 papers

math.OA2014

Cebysev subspaces of JBW*-triples

Fatmah B. Jamjoom, Antonio M. Peralta, Akhlaq A. Siddiqui +1

We describe the one-dimensional Čebyšëv subspaces of a JBW $^{*}$ -triple $M,$ by showing that for a non-zero element $x$ in $M$ , $C x$ is a Čebyšëv subspace of $M$ if, and onl…

math.OA2014

Approximation and convex decomposition by extremals and the $λ$ -function in JBW*-triples

Fatmah B. Jamjoom, Antonio M. Peralta, Akhlaq A. Siddiqui +1

We establish new estimates to compute the $λ$ -function of Aron and Lohman on the unit ball of a JB $^{*}$ -triple. It is established that for every Brown-Pedersen quasi-invertible elem…

Cebysev subspaces of JBW*-triples

Approximation and convex decomposition by extremals and the λ-function in JBW*-triples

Approximation and convex decomposition by extremals and the $λ$ -function in JBW*-triples