Hirotaka Ono

A linear time algorithm for L(2,1)-labeling of trees (2009)

Hasunuma, Toru, Ishii, Toshimasa, Ono, Hirotaka, Uno, Yushi, 蓮沼, 徹, 石井, 利昌, ...

17th Annual European Symposium on Algorithms (ESA) : 7–9 September 2009 : IT University of Copenhagen

Relationship between Approximability and Request Structures in the Minimum Certificate Dispersal Problem (2009)

Izumi, Tomoko, Izumi, Taisuke, Ono, Hirotaka, Wada, Koichi, 泉, 朋子, 泉, 泰介, ...

Computing and Combinatorics, 15th Annual International Conference, COCOON : Niagara Falls, NY, USA, July 13-15, 2009

Deductive Inference for the Interiors and Exteriors of Horn Theories (2009)

Makino, Kazuhisa, Ono, Hirotaka

In this paper, we investigate the deductive inference for the interiors and exteriors of Horn knowledge bases, where the interiors and exteriors were introduced by Makino and Ibaraki to study...

Drawing Borders Efficiently (2009)

Iwama, Kazuo, Miyano, Eiji, Ono, Hirotaka, 岩間, 一雄, 宮野, 英次, 小野, 廣隆, ...

A spreadsheet, especially MS Excel, is probably one of the most popular software applications for personal-computer users and gives us convenient and user-friendly tools for drawing tables. Using...

A linear time algorithm for L(2,1)-labeling of trees (2008)

Hasunuma, Toru, Ishii, Toshimasa, Ono, Hirotaka, Uno, Yushi

An L(2,1)-labeling of a graph $G$ is an assignment $f$ from the vertex set $V(G)$ to the set of nonnegative integers such that $|f(x)-f(y)|\ge 2$ if $x$ and $y$ are adjacent and $|f(x)-f(y)|\ge 1$ if...

An O(n^{1.75}) Algorithm for L(2,1)-labeling of Trees (2008)

Hasunuma, Toru, Ishii, Toshimasa, Ono, Hirotaka, Uno, Yushi, 蓮沼, 徹, 石井, 利昌, ...

Algorithm Theory - SWAT 2008, 11th Scandinavian Workshop on Algorithm Theory, Gothenburg, Sweden, July 2-4, 2008, Proceedings

Graph Orientation Algorithms to (2008)

Minimize The Maximum, Yuichi Asahiro, Eiji Miyano, Hirotaka Ono, Kouhei Zenmyo

We study the problem of orienting the edges of a weighted graph such that the maximum weighted outdegree of vertices is minimized. This problem, which has applications in the guard arrangement for...

SUMMARY (2007)

Kazuhisa Makino, Takashi Suda, Hirotaka Ono

are used as a convenient meanst explain given posit [ e examples andnegatE e examples, which is a form ofdat mining and knowledge discovery.StE#fl]b met# ods such as ID3 may providenon-monot85 [...

A faster algorithm for two-variable integer programming (2003)

Eisenbrand, Friedrich, Laue, Soeren, Ibaraki, Toshihide, Katoh, Naoki, Ono, Hirotaka

We show that a 2-variable integer program, defined by $m$ constraints involving coefficients with at most $\varphi$ bits can be solved with $O(m + \varphi)$ arithmetic operations on rational numbers...