A character-sum estimate and applications
Karl K. Norton (1998)
Acta Arithmetica
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Karl K. Norton (1998)
Acta Arithmetica
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W. W. L. Chen, V. F. Lev (1998)
Acta Arithmetica
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Harald Niederreiter, Chaoping Xing (1997)
Acta Arithmetica
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Haim Judah, Andrzej Rosłanowski, Saharon Shelah (1994)
Fundamenta Mathematicae
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We give several examples of Souslin forcing notions. For instance, we show that there exists a proper analytical forcing notion without ccc and with no perfect set of incompatible elements, we give an example of a Souslin ccc partial order without the Knaster property, and an example of a totally nonhomogeneous Souslin forcing notion.
Robert El Bashir, Tomáš Kepka (1998)
Fundamenta Mathematicae
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For every module M we have a natural monomorphism and we focus attention on the case when Φ is also an epimorphism. The corresponding modules M depend on thickness of the cardinal number card(I). Some other limits are also considered.
Christian Ballot (1999)
Acta Arithmetica
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