Title of article
Ramanujan geometries of type
Author/Authors
Donald I. Cartwright، نويسنده , , Patrick Sole، نويسنده , , Alain Valette and Andrzej Zuk، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2003
Pages
9
From page
35
To page
43
Abstract
We study finite graphs which are covered by the 1-skeleton of a building of type Ãn and with an extremal spectral property: they are Ãn-Ramanujan in the sense of Lubotzky. That definition is made quantitatively explicit, refined in the directed case, and a few candidates are suggested.
Keywords
Ramanujan graph , Building , Spectrum , Cyclic simple algebra
Journal title
Discrete Mathematics
Serial Year
2003
Journal title
Discrete Mathematics
Record number
949201
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