Krls<P,K,D> implements the Kernel Recursive Least Squares method [1].
Defined in the KML header <kml/krls.hpp>.
Yaakov Engel, Shie Mannor, and Ron Meir. The kernel recursive least squares algorithm. ICNC03 001, Interdisciplinary Center for Neural Computation, Hebrew University, Jerusalem, Israel, 2003.
http://visl.technion.ac.il/~yaki/papers/krls-report.pdf