The Kellogg method, Birger’s method and its modified Birger procedure for determination of eigenvalues and eigenvectors of linear nonnegative and self-adjoint operators are investigated.
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Josef Kolomý, On the Kellogg method and its variants for finding of eigenvalues and eigenfunctions of linear self-adjoint operators. Z. Anal. Anwend. 2 (1983), no. 4, pp. 291–297DOI 10.4171/ZAA/66