2 papers
math.CO2006
Computing holes in semi-groups and its applications to transportation problems
Raymond Hemmecke, Akimichi Takemura, Ruriko Yoshida
An integer feasibility problem is a fundamental problem in many areas, such as operations research, number theory, and statistics. To study a family of systems with no nonnegative…
math.CO2006
Saturation points on faces of a rational polyhedral cone
Akimichi Takemura, Ruriko Yoshida
Different commutative semigroups may have a common saturation. We consider distinguishing semigroups with a common saturation based on their ``sparsity''. We propose to qualitative…