compressed Least Squares.

compressed Least Squares.

Vianello M., Leopardi P., Sommariva A. (2017) "Optimal polynomial meshes and Caratheodory-Tchakaloff submeshes on the sphere " Dolomites Research Notes on Approximation, 10(Special_Issue), 18-24. DOI: 10.14658/PUPJ-DRNA-2017-Special_Issue-4