Akira Hiraki

According to our database, Akira Hiraki authored at least 31 papers between 1993 and 2012.

Collaborative distances:

• Dijkstra number of four.
• Erdős number of three.

2012

A Characterization of the Hamming Graphs and the Dual Polar Graphs by Completely Regular Subgraphs.

Akira Hiraki

Graphs Comb., 2012

2010

Delsarte Set Graphs with Small <i>c</i>₂.

Sejeong Bang, Akira Hiraki, Jack H. Koolen

Graphs Comb., 2010

2009

Distance-Regular Graph with <i>c</i>₂ > 1 and <i>a</i>₁ = 0 <i>a</i>₂.

Akira Hiraki

Graphs Comb., 2009

A characterization of some distance-regular graphs by strongly closed subgraphs.

Akira Hiraki

Eur. J. Comb., 2009

2008

Strongly Closed Subgraphs in a Distance-Regular Graph with <i>c</i> ₂ > 1.

Akira Hiraki

Graphs Comb., 2008

A characterization of the Hamming graph by strongly closed subgraphs.

Akira Hiraki

Eur. J. Comb., 2008

2007

A characterization of the Odd graphs and the doubled Odd graphs with a few of their intersection numbers.

Akira Hiraki

Eur. J. Comb., 2007

Delsarte clique graphs.

Sejeong Bang, Akira Hiraki, Jacobus H. Koolen

Eur. J. Comb., 2007

2006

Improving diameter bounds for distance-regular graphs.

Sejeong Bang, Akira Hiraki, Jacobus H. Koolen

Eur. J. Comb., 2006

2005

A generalization of an inequality of Brouwer-Wilbrink.

Akira Hiraki, Jack H. Koolen

J. Comb. Theory, Ser. A, 2005

Applications of the retracing method for distance-regular graphs.

Akira Hiraki

Eur. J. Comb., 2005

2004

A Note on Regular Near Polygons.

Akira Hiraki, Jack H. Koolen

Graphs Comb., 2004

2003

The Number of Columns (1, k-2, 1) in the Intersection Array of a Distance-Regular Graph.

Akira Hiraki

Graphs Comb., 2003

A distance-regular graph with bipartite geodetically closed subgraphs.

Akira Hiraki

Eur. J. Comb., 2003

A characterization of the doubled Grassmann graphs, the doubled Odd graphs, and the Odd graphs by strongly closed subgraph.

Akira Hiraki

Eur. J. Comb., 2003

2000

Retracing Argument for Distance-Regular Graphs.

Akira Hiraki

J. Comb. Theory, Ser. B, 2000

1999

Distance-regular Graphs of the Height <i>h</i>.

Akira Hiraki

Graphs Comb., 1999

Strongly Closed Subgraphs in a Regular Thick Near Polygon.

Akira Hiraki

Eur. J. Comb., 1999

An Application of a Construction Theory of Strongly Closed Subgraphs in a Distance-regular Graph.

Akira Hiraki

Eur. J. Comb., 1999

1998

Distance-regular Subgraphs in a Distance-regular Graph, VI.

Akira Hiraki

Eur. J. Comb., 1998

Distance-regular Subgraphs in a Distance-regular Graph, V.

Akira Hiraki

Eur. J. Comb., 1998

1997

Distance-regular Subgraphs in a Distance-regular Graph, IV.

Akira Hiraki

Eur. J. Comb., 1997

Distance-regular Graphs with b₂=1 and Antipodal Covers.

Makoto Araya, Akira Hiraki, Aleksandar Jurisic

Eur. J. Comb., 1997

1996

Distance-Regular Graphs with <i>b</i>_<i>t</i>=1 and Antipodal Double-Covers.

Makoto Araya, Akira Hiraki, Aleksandar Jurisic

J. Comb. Theory, Ser. B, 1996

A constant bound on the number of columns (1, <i>k</i> - 2, 1) in the intersection array of a distance-regular graph.

Akira Hiraki

Graphs Comb., 1996

Distance-regular Subgraphs in a Distance-regular Graph, III.

Akira Hiraki

Eur. J. Comb., 1996

1995

On distance-regular graphs with<i>k</i>_<i>i</i> =<i>k</i>_<i>j</i>, II.

Akira Hiraki, Hiroshi Suzuki, Masayuki Wajima

Graphs Comb., 1995

Distance-regular subgraphs in a distance-regular graph, II.

Akira Hiraki

Eur. J. Comb., 1995

Distance-regular subgraphs in a distance-regular graph, I.

Akira Hiraki

Eur. J. Comb., 1995

1994

An Improvement of the Boshier-Nomura Bound.

Akira Hiraki

J. Comb. Theory, Ser. B, 1994

1993

A Circuit Chasing Technique in a Distance-regular Graph with Triangles.

Akira Hiraki

Eur. J. Comb., 1993