Abstract
In this work, we construct, for any \(d \ge 2\), a new foliation on \(\mathbb {CP}^2\) of degree d with a unique singular point of multiplicity \(d-1\) without invariant algebraic curves that contain all its separatrices. We also prove that if X is a foliation on \(\mathbb {CP}^2\) with a unique nilpotent singular point, then X has no algebraic leaves. Finally, we characterize logarithmic foliations on \(\mathbb {CP}^2\) with a unique singular point. And we give some new examples of this kind of foliations.
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References
Alcántara, C.R.: Foliations on of degree \(d\) with a singular point with Milnor number \(d^2+d+1\). Rev. Mat. Complut. 31(1), 187–199 (2018)
Alcántara, C.R., Pantaleón-Mondragón, R.: Foliations on with a unique singular point without invariant algebraic curves. Geom. Dedicata 207, 193–200 (2020)
Brunella, M.: Birational Geometry of Foliations. IMPA Monographs 1. Springer, ISBN: 978-3-319-14309-5; 978-3-319-14310-1
Camacho, C., Lins Neto, A., Sad, P.: Topological invariants and equidesingularization for holomorphic vector fields. J. Differ. Geom. 20(1), 143–174 (1984)
Camacho, C., Lins Neto, A., Sad, P.: Minimal sets of foliations on complex projective spaces. Inst. Hautes Etudes Sci. Publ. Math. 68(1988), 187–203 (1989)
Cerveau, D.: Formes Logarithmiques et Feuilletages non Dicritiques. J. Singul. 9, 50–55 (2014)
Cerveau, D., Déserti, J., Garba Belko, D., Meziani, R.: Géométrie classique de certains feuilletages de degré deux. Bull. Braz. Math. Soc. New Ser. 41(2), 161–198 (2010)
Fernández-Pérez, A., Mol, R.: Residue-type indices and holomorphic foliations. Ann. Sc. Norm. Super. Pisa Cl. Sci. (5) 19(3), 1111–1134 (2019)
Gómez-Mont, X.: An algebraic formula for the index of a vector field on a hypersurface with an isolated Singularity. J. Algebr. Geom. 7(4), 731–752 (1998)
Gómez-Mont, X., Ortiz-Bobadilla, L.: Sistemas dinámicos holomorfos en superficies. Aportaciones Matemáticas: Notas de Investigación [Mathematical Contributions: Research Notes], 3. Sociedad Matemática Mexicana, México (1989)
Joanoulou, J.P.: Equations de Pfaff algébriques (French) [Algebraic Pfaffian Equations] Lecture Notes in Mathematics, vol. 708. Springer, Berlin (1979)
Lins Neto, A., Soares, M.G.: Algebraic Solutions of one-dimensional Foliations. J. Differ. Geom. 43, 652–673 (1996)
Meziani, R.: Classification analytique d’équations différentielles \(ydy+...=0\) et espace de modules. Bol. Soc. Brasil. Mat. (N.S.) 27(1), 23–53 (1996)
Ploski, A.: A bound for the Milnor number of plane curve singularities. Cent. Eur. J. Math. 12(5), 688–693 (2014)
Stròzyna, E.: The analytic and formal normal form for the nilpotent singularity. The case of generalized saddle-node. Bull. Sci. Math. 126(7), 555–579 (2002)
Wall, C.T.C.: Singular Points of Plane Curves. London Mathematical Society Student Texts, vol. 63. Cambridge University Press, Cambridge (2004)
Zoladek, H.: New examples of holomorphic foliations without algebraic leaves. Studia Math. 131(2), 137–142 (1998)
Acknowledgements
I would like to thank Jawad Snoussi for helpful conversations on this work and for the company during the pandemic, as well as the referees for very useful comments and suggestions which helped to improve this paper.
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This work was supported by Conacyt (Grant 284424)
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Alcántara, C.R. Special foliations on \(\mathbb {CP}^2\) with a unique singular point. Res Math Sci 9, 15 (2022). https://doi.org/10.1007/s40687-022-00311-9
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DOI: https://doi.org/10.1007/s40687-022-00311-9