Joins of DGA modules and sectional category.
Fernández Suárez, Lucía, Ghienne, Pierre, Kahl, Thomas, Vandembroucq, Lucile (2006)
Algebraic & Geometric Topology
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Fernández Suárez, Lucía, Ghienne, Pierre, Kahl, Thomas, Vandembroucq, Lucile (2006)
Algebraic & Geometric Topology
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Ragnarsson, Kári (2006)
Algebraic & Geometric Topology
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Lawson, Tyler (2006)
Algebraic & Geometric Topology
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Fei Xu, Jianqiang Zhao (1996)
Acta Arithmetica
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Radovanović, Miloš, Ferlež, Jure, Mladenović, Dunja, Grobelnik, Marko, Ivanović, Mirjana (2007)
Novi Sad Journal of Mathematics
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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.
Matthew J. Klassen, Edward F. Schaefer (1996)
Acta Arithmetica
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Daciberg Gonçalves, Jerzy Jezierski (1997)
Fundamenta Mathematicae
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We generalize the Lefschetz coincidence theorem to non-oriented manifolds. We use (co-) homology groups with local coefficients. This generalization requires the assumption that one of the considered maps is orientation true.
Nobuyuki Kemoto, Tsugunori Nogura, Kerry Smith, Yukinobu Yajima (1996)
Fundamenta Mathematicae
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Let λ be an ordinal number. It is shown that normality, collectionwise normality and shrinking are equivalent for all subspaces of .
Romuald Dąbrowski, Benji Fisher (1997)
Acta Arithmetica
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