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The statistical estimate of the number of local minima in an energy function obtained by a finite random sampling, due to Walker and Walstedt (W%), is clarified. In particular, it is found that an additional assumption, of the Bayesian type, seems to be needed, and the consequences are discussed in some detail. The relaxation of the explicit assumption of W%', that each minimum has equal a priori probability of being sampled, is discussed briefly.

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ERRATA 2611Accordingly, f(t) in the last paragraph of Appendix B and in the ordinate of Fig. 6 should be replaced by 4(t). The last sentence in Appendix B should be changed to "Function 4(t), the probability that no jumps occur in [0, tj, is depicted in Fig. 6. " The caption for Fig. 6 should be changed to "Function @(t) corresponding to the jump-rate distribution (2) is shown when p = 1. t = zest is the reduced time. " 1990 The American Physical Society Erratum: Superconducting pairing of holes in the antiferromagnetic state of the two-dimensional Hubbard model [Phys. Rev. B 39, 2956 (1989)) In the abstract and in the text, we stated that the Cooper instability for doped holes occurs in the singlet d-wave channel. Since the spin-up-spin-down pairing state in a spin-density-wave background is actually an admixture of both singlet and triplet states, ' the word "singlet" in the above statement is incorrect and should be dropped.In Eq. (6) the quantities on the left-hand side should be squared.'Erratum: Low-lying disordered states when ground-state long-range order exists; large-amplitude spin waves [Phys. Rev. B 41, 6882 (1990)l