Pure and mixed exponential sums
Todd Cochrane, Zhiyong Zheng (1999)
Acta Arithmetica
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Todd Cochrane, Zhiyong Zheng (1999)
Acta Arithmetica
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E. V. Flynn (1994)
Acta Arithmetica
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Stéphane Louboutin, Young-Ho Park, Yann Lefeuvre (1999)
Acta Arithmetica
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A. Borisov, M. Filaseta, T. Y. Lam, O. Trifonov (1999)
Acta Arithmetica
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Jörg Brendle, Tim La Berge (1996)
Fundamenta Mathematicae
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We prove two theorems that characterize tightness in certain products of fans in terms of families of integer-valued functions. We also define several notions of forcing that allow us to manipulate the structure of the set of functions from some cardinal θ to ω, and hence, the tightness of these products. These results give new constructions of first countable <θ-cwH spaces that are not ≤θ-cwH.
Romuald Dąbrowski, Benji Fisher (1997)
Acta Arithmetica
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Günter Lettl (1998)
Acta Arithmetica
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