Keyword : approximation preserving reductions

Approximation Preserving Reductions among Item Pricing Problems
Ryoso HAMANE  Toshiya ITOH  Kouhei TOMITA 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2009/02/01
Vol. E92-D  No. 2  pp. 149-157
Type of Manuscript: Special Section PAPER (Special Section on Foundations of Computer Science)
Category: 
Keyword: 
item pricing problem,  approximation preserving reductions,  price models,  selfloops, 
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