論文

• Ryoso Hamane, Toshiya Itoh, Kouhei Tomita. Approximation Algorithms for the Highway Problem under the Coupon Model, IEICE Trans. on Fundamentals, IEICE, Vol. E92-A, No. 8, pp. 1779-1786, Aug. 2009.
• Ryoso Hamane, Toshiya Itoh, Kouhei Tomita. Approximation Preserving Reductions among Item Pricing Problems, IEIC Transactions on Information and Systems, IEICE, Vol. E92.D, No. 2, pp. 149-157, Feb. 2009.
• Toshiya Itoh, Ryoso Hamane. Improved Approximation Allgorithms for Item Pricing with Bounded Degree and Valuation, IEICE Trans. on Information and Systems, Vol. 91-D, No. 2, pp. 187-199, Feb. 2008.

その他の論文・著書など

• Ryoso Hamane, Toshiya Itoh, Kouhei Tomita. Approximation Algorithms for the Highway Problem under the Coupon Model, arXiv, No. 0712.2629v1, Dec. 2007.

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