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Published online by Cambridge University Press: 14 November 2011
We develop a systematic method for calculating real numbers Λ1, and Λ2 such that there are no non-trivial solutions of the equation
which belong to L2(a, ∞) for λ> Λ1, or λ < Λ2. We also give conditions under which this equation has no solutions in L2(a,∞) for any real number λ.