We construct distance-regular graphs with the same - classical - parameters as the Grassmann graphs on the e-dimensional subspaces of a (2e + 1)-dimensional space over an arbitrary finite field. This provides the first known family of non-vertex-transitive distance-regular graphs with unbounded diameter.
机构:
Institute of Mathematics and Mechanics, Ural Branch, Russian Academy of Sciences, EkaterinburgInstitute of Mathematics and Mechanics, Ural Branch, Russian Academy of Sciences, Ekaterinburg
机构:
Hebei Normal Univ, Coll Math & Informat Sci, Shijiazhuang 050016, Peoples R China
Hebei Normal Univ, Hebei Key Lab Computat Math & Applicat, Shijiazhuang 050016, Peoples R ChinaHebei Normal Univ, Coll Math & Informat Sci, Shijiazhuang 050016, Peoples R China
Ma JianMin
Koolen, Jack H.
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机构:
Univ Sci & Technol China, Sch Math Sci, Hefei 230026, Peoples R ChinaHebei Normal Univ, Coll Math & Informat Sci, Shijiazhuang 050016, Peoples R China