Matches in DBpedia 2016-04 for { ?s ?p "Superstrong approximation is a generalisation of strong approximation in algebraic groups G, to provide \"spectral gap\" results. The spectrum in question is that of the Laplacian matrix associated to a family of quotients of a discrete group Γ; and the gap is that between the first and second eigenvalues (normalisation so that the first eigenvalue corresponds to constant functions as eigenvectors)."@en }
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- Superstrong_approximation comment "Superstrong approximation is a generalisation of strong approximation in algebraic groups G, to provide \"spectral gap\" results. The spectrum in question is that of the Laplacian matrix associated to a family of quotients of a discrete group Γ; and the gap is that between the first and second eigenvalues (normalisation so that the first eigenvalue corresponds to constant functions as eigenvectors).".