Presentations of the fundamental group of a manifold
B. Hajduk (1976)
Colloquium Mathematicae
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B. Hajduk (1976)
Colloquium Mathematicae
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Katsuro Sakai (1992)
Compositio Mathematica
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Rezaii, M.M., Barzegari, M. (2006)
Balkan Journal of Geometry and its Applications (BJGA)
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P. H. Doyle (1974)
Colloquium 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...
Di Terlizzi, Luigia, Pastore, Anna Maria (2002)
Balkan Journal of Geometry and its Applications (BJGA)
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Wlodzimierz Waliszewski (1987)
Colloquium Mathematicae
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U. C. Vohra, K. D. Singh (1972)
Annales Polonici Mathematici
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Im, Young Ho, Kang, Mee Kwang, Woo, Ki Mun (1998)
International Journal of Mathematics and Mathematical Sciences
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Dijkstra, Jan J., van Mill, Jan (2004)
Electronic Research Announcements of the American Mathematical Society [electronic only]
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Xu, Xufeng, Chao, Xiaoli (1998)
International Journal of Mathematics and Mathematical Sciences
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Jiří Vanžura (2017)
Archivum Mathematicum
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We find necessary and sufficient conditions for the integrability of one type of multisymplectic 3-forms on a 6-dimensional manifold.