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p (2007)

Abstract
Let G be a graph on n vertices. A 2-lift of G is a graph H on 2n vertices, with a covering map : H! G. It is not hard to see that all eigenvalues of G are also eigenvalues of H. In addition, H has n \new" eigenvalues. We conjecture that every d-regular graph has a 2-lift such that all new eigenvalues are in the range [ 2 p

Publication details
Download http://citeseerx.ist.psu.edu/viewdoc/summary?doi=?doi=10.1.1.10.5190
Source http://www.cs.huji.ac.il/~nati/PAPERS/raman_lift.ps.gz
Contributors CiteSeerX
Repository CiteSeerX - Scientific Literature Digital Library and Search Engine (United States)
Keywords Lifts, Lifts of Graphs, Discrepancy, Expander Graphs
Type text
Language English
Relation 10.1.1.101.7190, 10.1.1.71.2902, 10.1.1.93.8362, 10.1.1.124.2315, 10.1.1.19.2291, 10.1.1.19.1043, 10.1.1.50.2658