It is known that the probability Eβ(0, S) that an arbitrary interval of length S contains none of the eigenvalues of a random matrix chosen from the orthogonal (β = 1), unitary (β = 2) or symplectic (β = 4) ensemble can be expressed in terms if infinite products n=0[1−λ2n(S)] and n=0[1=λ2n+1(S)], where λn(S) is an eigenvalue of a certain integral equation. Using values of λn(S), valid for S large, obtained in connection with a recent study of spheroidal functions, we derive asymptotic expressions (S ≫ 1) for Eβ(0, S).

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