Descent via isogeny in dimension 2
E. V. Flynn (1994)
Acta Arithmetica
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E. V. Flynn (1994)
Acta Arithmetica
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Romuald Dąbrowski, Benji Fisher (1997)
Acta Arithmetica
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Shizuo Kamo (1994)
Fundamenta Mathematicae
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Wolfgang Lück (1999)
Fundamenta Mathematicae
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We introduce the universal functorial Lefschetz invariant for endomorphisms of finite CW-complexes in terms of Grothendieck groups of endomorphisms of finitely generated free modules. It encompasses invariants like Lefschetz number, its generalization to the Lefschetz invariant, Nielsen number and -torsion of mapping tori. We examine its behaviour under fibrations.
Todd Cochrane, Zhiyong Zheng (1999)
Acta Arithmetica
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Andrzej Rosłanowski, Saharon Shelah (1998)
Fundamenta Mathematicae
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We deal with some problems posed by Monk [Mo 1], [Mo 3] and related to cardinal invariants of ultraproducts of Boolean algebras. We also introduce and investigate several new cardinal invariants.
Jürgen Ritter, Alfred Weiss (1999)
Acta Arithmetica
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Jan-Hendrik Evertse (1995)
Acta Arithmetica
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