Akira Hiraki - researchr alias

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Viewing Publication 1 - 31 from 31

2012

A Characterization of the Hamming Graphs and the Dual Polar Graphs by Completely Regular SubgraphsAkira Hiraki. gc, 28(4):449-467, 2012. [doi]

2010

Delsarte Set Graphs with Small ::::c::::::2::S. Bang, Akira Hiraki, Jack H. Koolen. gc, 26(2):147-162, 2010. [doi]

2009

Distance-Regular Graph with ::::c::::::2:: > 1 and ::::a::::::1:: = 0 ::::a::::::2::Akira Hiraki. gc, 25(1):65-79, 2009. [doi]

A characterization of some distance-regular graphs by strongly closed subgraphsAkira Hiraki. ejc, 30(4):893-907, 2009. [doi]

2008

A characterization of the Hamming graph by strongly closed subgraphsAkira Hiraki. ejc, 29(7):1603-1616, 2008. [doi]

Strongly Closed Subgraphs in a Distance-Regular Graph with ::::c:::: ::2:: > 1Akira Hiraki. gc, 24(6):537-550, 2008. [doi]

2007

Delsarte clique graphsS. Bang, Akira Hiraki, Jacobus H. Koolen. ejc, 28(2):501-516, 2007. [doi]

A characterization of the Odd graphs and the doubled Odd graphs with a few of their intersection numbersAkira Hiraki. ejc, 28(1):246-257, 2007. [doi]

2006

Improving diameter bounds for distance-regular graphsS. Bang, Akira Hiraki, Jacobus H. Koolen. ejc, 27(1):79-89, 2006. [doi]

2005

A generalization of an inequality of Brouwer-WilbrinkAkira Hiraki, Jack H. Koolen. JCT, 109(1):181-188, 2005. [doi]

Applications of the retracing method for distance-regular graphsAkira Hiraki. ejc, 26(5):717-727, 2005. [doi]

2004

A Note on Regular Near PolygonsAkira Hiraki, Jack H. Koolen. gc, 20(4):485-497, 2004. [doi]

2003

A characterization of the doubled Grassmann graphs, the doubled Odd graphs, and the Odd graphs by strongly closed subgraphAkira Hiraki. ejc, 24(2):161-171, 2003. [doi]

A distance-regular graph with bipartite geodetically closed subgraphsAkira Hiraki. ejc, 24(4):349-363, 2003. [doi]

The Number of Columns (1, k-2, 1) in the Intersection Array of a Distance-Regular GraphAkira Hiraki. gc, 19(3):371-387, 2003. [doi]

2000

Retracing Argument for Distance-Regular GraphsAkira Hiraki. JCT, 79(2):211-220, 2000. [doi]

1999

An Application of a Construction Theory of Strongly Closed Subgraphs in a Distance-regular GraphAkira Hiraki. ejc, 20(4):271-278, 1999. [doi]

Strongly Closed Subgraphs in a Regular Thick Near PolygonAkira Hiraki. ejc, 20(8):789-796, 1999. [doi]

hAkira Hiraki. gc, 15(4):417-428, 1999. [doi]

1998

Distance-regular Subgraphs in a Distance-regular Graph, VAkira Hiraki. ejc, 19(2):141-150, 1998. [doi]

Distance-regular Subgraphs in a Distance-regular Graph, VIAkira Hiraki. ejc, 19(8):953-965, 1998. [doi]

1997

Distance-regular Graphs with b::2::=1 and Antipodal CoversMakoto Araya, Akira Hiraki, Aleksandar Jurisic. ejc, 18(3):243-248, 1997. [doi]

Distance-regular Subgraphs in a Distance-regular Graph, IVAkira Hiraki. ejc, 18(6):635-645, 1997. [doi]

1996

Distance-Regular Graphs with ::::b::::::::::t::::::=1 and Antipodal Double-CoversMakoto Araya, Akira Hiraki, Aleksandar Jurisic. JCT, 67(2):278-283, 1996. [doi]

Distance-regular Subgraphs in a Distance-regular Graph, IIIAkira Hiraki. ejc, 17(7):629-636, 1996. [doi]

k - 2, 1) in the intersection array of a distance-regular graphAkira Hiraki. gc, 12(1):23-37, 1996. [doi]

1995

Distance-regular subgraphs in a distance-regular graph, IAkira Hiraki. ejc, 16(6):589-602, 1995. [doi]

Distance-regular subgraphs in a distance-regular graph, IIAkira Hiraki. ejc, 16(6):603-615, 1995. [doi]

j, IIAkira Hiraki, Hiroshi Suzuki, Masayuki Wajima. gc, 11(4):305-317, 1995. [doi]

1994

An Improvement of the Boshier-Nomura BoundAkira Hiraki. JCT, 61(1):1-4, 1994. [doi]

1993

A Circuit Chasing Technique in a Distance-regular Graph with TrianglesAkira Hiraki. ejc, 14(5):413-420, 1993. [doi]

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