Stability results of the Bishop-Phelps-Bollobás property and the generalized AHSP (2506.17762v1)

Abstract: In this paper, we study the Bishop-Phelps-Bollob\'as property for operators (BPBp for short). To this end, we investigate the generalized approximate hyperplane series property (generalized AHSP for short) for a pair $(X,Y)$ of Banach spaces, which characterizes when $(\ell_1(X),Y)$ has the BPBp. We prove the following results. For $L$ a locally compact Hausdorff space and $\mathcal{A}$ a unital uniform algebra, if either $(X, \mathcal{C}_0(L,Y))$ or $(X, \mathcal{A}^Y)$ has the BPBp, then so does $(X,Y)$. Furthermore, if $X$ is finite-dimensional and the pair $(X, Y)$ has the generalized AHSP, then the pair $(X, Z)$ also has the generalized AHSP, where $Z$ is one of the spaces $\mathcal{C}(K, Y)$, $\mathcal{C}_0(L, Y)$, $\mathcal{C}_b(\Omega, Y)$, or $\mathcal{A}^Y$, with $K$ a compact Hausdorff space, $\Omega$ a completely regular space, and $\mathcal{A}$ a uniform algebra.