 Furthermore, we explore the performance of a novel cross-validation-based solver and basis adaptivity selection scheme , which consistently provides close-to-optimal results  .
<meaning-changed>  Furthermore, we explore the performance of a novel cross-validation-based solver and basis adaptivity selection scheme , which consistently provides close-to-optimal results  .
 Furthermore, we explore the performance of a novel cross-validation-based solver and basis adaptivity selection scheme guided by cross-validation error. We demonstrate that this meta-selection procedure provides close-to-optimal results .