On the equality of kernel AdaTron and sequential minimal optimization in classification and regression tasks and alike algorithms for kernel machines

The paper presents the equality of a kernel AdaTron (KA) method (originating from a gradient ascent learning approach) and sequential minimal optimization (SMO) learning algorithm (based on an analytic quadratic programming step) in designing the support vector machines (SVMs) having positive definite kernels. The conditions of the equality of two methods are established. The equality is valid for both the nonlinear classification and the nonlinear regression tasks, and it sheds a new light to these seemingly different learning approaches. The paper also introduces other learning techniques related to the two mentioned approaches, such as the nonnegative conjugate gradient, classic Gauss-Seidel (GS) coordinate ascent procedure and its derivative known as the successive over-relaxation (SOR) algorithm as a viable and usually faster training algorithms for performing nonlinear classification and regression tasks. The convergence theorem for these related iterative algorithms is proven. Proceedings of 11 th European Symposium on Artificial Neural Networks, pp. 215-222, ESANN 2003, Bruges, Belgium, 2003