Planar normal sections on the natural embedding of a real flag manifold.
Sánchez, Cristián U., García, Alicia N., Dal Lago, Walter (2000)
Beiträge zur Algebra und Geometrie
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Sánchez, Cristián U., García, Alicia N., Dal Lago, Walter (2000)
Beiträge zur Algebra und Geometrie
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Katsuro Sakai (1978)
Fundamenta Mathematicae
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Taras Banakh, Robert Cauty (2007)
Banach Center Publications
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We prove that a space M with Disjoint Disk Property is a Q-manifold if and only if M × X is a Q-manifold for some C-space X. This implies that the product M × I² of a space M with the disk is a Q-manifold if and only if M × X is a Q-manifold for some C-space X. The proof of these theorems exploits the homological characterization of Q-manifolds due to Daverman and Walsh, combined with the existence of G-stable points in C-spaces. To establish the existence of such points we prove (and...
Kühnel, Wolfgang (2004)
Documenta Mathematica
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Nicholaas H. Kuiper (1967)
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Di Terlizzi, Luigia, Pastore, Anna Maria (2002)
Balkan Journal of Geometry and its Applications (BJGA)
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Freedman, Michael H., Kitaev, Alexei, Nayak, Chetan, Slingerland, Johannes K., Walker, Kevin, Wang, Zhenghan (2005)
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Commentationes Mathematicae Universitatis Carolinae
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We classify the genus one compact (PL) 5-manifolds and prove some results about closed 5-manifolds with free fundamental group. In particular, let be a closed connected orientable smooth -manifold with free fundamental group. Then we prove that the number of distinct smooth -manifolds homotopy equivalent to equals the -nd Betti number (mod ) of .