Points very close to the smallest ideal of ßS.
N. Hindman, A.T. Lisan (1994)
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N. Hindman, A.T. Lisan (1994)
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K.A. Zareckii (1974)
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D.W. Hardy, G. Markowsky, R.L. Brandon (1972)
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B.M. Schein (1976/77)
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F.W. Roush, K.H. Kim (1977)
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G.B. Preston (1974)
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Ki-Hang, Kim Butler (1974)
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S. Premchand (1984)
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K. Ahre (1984)
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D.A. Jackson (1991)
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