# metadata.dc.description.abstract[].value
We discuss the geometry of the unit ball —specifically, the structure of its extreme points (if any)— in subspaces of $L^{1}$ and $L^{\infty}$ on the circle that are formed by functions with prescribed spectral gaps. A similar issue is considered for kernels of Toeplitz operators in $H^{\infty}$.

# metadata.dc.relation.ispartof[].value
Integral Equations and Operator Theory, 2023, vol. 95, num.2

# metadata.dc.source[].value
Articles publicats en revistes (Matemàtiques i Informàtica)