Abstract
Let X be a simply-connected space, \((\Lambda V, d)\) its minimal Sullivan model and \(d_k\) (\(k\ge 2\)) the first non-zero homogeneous part of the differential d. In this paper, assuming that \((\Lambda V, d_k)\) is elliptic, we show that \(H(\Lambda V,d)\) has no \(e_0\)-gap and consequently we confirm the Hilali conjecture when \(V = V^{odd}\) or else when \(k\ge 3\).
Résumé
Soit X un espace topologique simplement connexe, \((\Lambda V, d)\) son modéle minimal de Sullivan et \(d_k\) (\(k\ge 2\)) la premiére partie homogéne non nulle de la différentielle d. Dans cet article, en supposant que \((\Lambda V, d_k)\) est elliptique, nous montrons que \(H(\Lambda V,d)\) n’a aucun \(e_0\)-écart et par conséquent, nous confirmons la conjecture de Hilali lorsque \(V = V^{impair}\) ou lorsque \(k\ge 3\)
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Notes
The case where \(V=V^{odd}\) was treated under some restrictive hypothesis by Amann in [2], who I thank for informing and inspiring me to add such a generalization here.
References
Allday, C., Halperin, S.: Lie group actions on spaces of finite rank. Q. J. Math. Oxf. 28, 69–76 (1978)
Amann, M.: A note on the Hilali conjecture. Forum Mathematicum 29(2), 251–258 (2017)
De Bobadilla, J.F., Fresan, J., Munõz, V., Murillo, A.: The Hilali conjecture for hyperelliptic spaces. In: Pardalos, P., Rassias, ThM (eds.) Mathematics Without Boundaries, Surveys in Pure Mathematics, pp. 21–36. Springer, Berlin (2014)
Boutahir, K., Rami, Y.: On LS-category of a family of rational elliptic spaces II. Extracta Mathematicae 31(2), 235–250 (2016)
El Krafi, B.B., Hilali, M.R., Mamouni, M.I.: On Hilali’s conjectre related to Halperin’s. JHRS 3, 493–501 (2016)
Félix, Y., Halperin, S.: Rational LS-category and its applications. Trans. Am. Math. Soc. 273, 1–37 (1982)
Félix, Y., Halperin, S.: Rational homotopy theory via Sullivan models: a survey. Not. Int. Congr. Chin. Math. 5(2), 14–36 (2017)
Félix, Y., Halperin, S., Thomas, J.-C.: Rational Homotopy Theory. Graduate Texts in Mathematics, vol. 205. Springer, Berlin (2001)
Félix, Y., Oprea, J., Tanré, D.: Algebraic Models in Geometry. Oxford Graduate Texts in Mathematics, vol. 17. Oxford University Press, Oxford (2008)
Halperin, S.: Rational Homotopy and Torus Actions. Aspects of Topology, London Mathematical socity Lecture Notes, vol. 93, pp. 293–306. Cambridge University Press, Cambridge (1985)
Hilali, M.R., Mamouni, M.I.: A conjectured lower bound for the cohomological dimension of elliptic spaces. J. Homotopy Relat. Struct. 3, 379–384 (2008)
Hilali, M.R.: Action du Tore \(\mathbf{T}^n\) sur les espaces simplement connexes, Ph.D. thesis, Université Catholique de Louvain, Belgique (1990)
Kahl, T., Vandembroucq, L.: Gaps in the Milnor–Moore spectral sequence. Bull. Belg. Math. Soc. Simon Stiven 9(2), 265–277 (2002)
Lechuga, L., Murillo, A.: A formula for the rational LS-category of certain spaces. Ann. L’inst. Fourier 52, 1585–1590 (2002)
Lupton, G.: The rational Toomer invariant and certain elliptic spaces. Contemp. Math. 316, 135–146 (2002)
McCleary, J.: A user’s Guide to Spectral Sequences, 2nd edn. Cambridge University Press, Cambridge (2001)
Munõz, V.: Conjetura del Rango Toral Confèrencies FME Volum III, Curs Gauss 2005-2006, 359-379. Publicaciones de la Sociedad Catalana de Matemáticas, 2008. Traducido al inglés por Giovanni Bazzoni: Toral Rank Conjecture
Nakamura, O., Yamaguchi, T.: Lower bounds for Betti numbers of elliptic spaces with certain formal dimensions. Kochi J. Math. 6, 9–28 (2011)
Sullivan, D.: Infinitesimal computations in topology. Publ. Math. IHES. 47, 269–331 (1977)
Acknowledgements
I would like to thank the referee for his valuable remarks and suggestions. I am also grateful to all members of the Moroccan Area of Algebraic Topology group for several discussions that contributed to the achievement of my results.
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Rami, Y. Gaps in the Milnor–Moore spectral sequence and the Hilali conjecture. Ann. Math. Québec 43, 435–442 (2019). https://doi.org/10.1007/s40316-018-0107-4
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DOI: https://doi.org/10.1007/s40316-018-0107-4