Optimal Kernel in a Class of Kernels with an Invariant Metric.

Akira Tanaka Hideyuki Imai Mineichi Kudo Masaaki Miyakoshi Optimal Kernel in a Class of Kernels with an Invariant Metric. 530-539 2008 SSPR/SPR http://dx.doi.org/10.1007/978-3-540-89689-0_57 conf/sspr/2008 db/conf/sspr/sspr2008.html#TanakaIKM08