Raymond Hemmecke

collaborators

Showing math.COShow all

2 papers · 1 filter

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.CO2004

Computation of Atomic Fibers of Z-Linear Maps

Raymond Hemmecke

For given matrix $A \in Z^{d \times n}$ , the set $P_{A, b}^{I} = {z : A z = b, z \in Z_{+}^{n}}$ describes the preimage or fiber of $b \in Z^{d}$ under the $Z$ -linear map $f_{A} : Z_{+}^{n} \to Z^{d}$ , $x\map…