Fast spectral Galerkin method for logarithmic singular equations on a segment by Jerez-Hanckes, C, Nicaise, S, Urzua-Torres, C

Optimal operator preconditioning for Galerkin boundary element methods on 3-dimensional screens by Hiptmair, R, Jerez-Hanckes, C, Urzua-Torres, C

Closed-form inverses of the weakly singular and hypersingular operators on disks by Hiptmair, R, Jerez-Hanckes, C, Urzúa-Torres, C