Abstract
We present a proof of a conjecture proposed by Yano (Sci Rep Saitama Univ Ser 10(2): 21–28, 1982) about the generic \( b \)-exponents of irreducible plane curve singularities.
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Notes
It is enough to take \( r \) small enough so that the cycles constructed in Sect. 13 lie on \( \overline{X}_{i, t}\).
References
A’Campo, N.: Le nombre de Lefschetz d’une monodromie. Indag. Math. 35, 113–118 (1973)
A’Campo, N.: Sur la monodromie des singularités isolées d’hypersurfaces complexes. Invent. Math. 20, 147–169 (1973)
A’Campo, N.: La fonction zêta d’une monodromie. Comment. Math. Helv. 50, 233–248 (1975)
Bartolo, E.A., Cassou-Noguès, P., Luengo, I., Hernández, A.M.: Yano’s conjecture for two-Puiseux-pair irreducible plane curve singularities. Publ. Res. Inst. Math. Sci. 53(1), 211–239 (2017)
Bernstein, J.: Analytic continuation of distributions with respect to a parameter. Funct. Anal. Appl. 6(4), 26–40 (1972)
Björk, J.-E.: Dimensions of modules over algebras of differential operators. Fonctions analytiques de plusieurs variables et analyse complexe (Colloq. Internat. CNRS, No. 208, Paris, 1972), Agora Mathematica, vol. 1, pp. 6–11. Gauthier-Villars, Paris (1974)
Blanco, G.: Poles of the complex zeta function of a plane curve. Adv. Math. 350(9), 396–439 (2019)
Brauner, K.: Zur Geometrie der Funktionen zweier komplexer Veräderlicher. II. Das Verhalten der Funktionen in der Umgebung ihrer Verzweigungsstellen. Abh. Math. Semin. Univ. Hambg. 6(1), 1–55 (1928)
Brieskorn, E.: Die Monodromie der isolierten Singularitäten von Hyperflächen. Manuscripta Math. 2, 103–161 (1970)
Budur, N.: On Hodge spectrum and multiplier ideals. Math. Ann. 327(2), 257–270 (2003)
Budur, N., Saito, M.: Multiplier ideals, \(V\)-filtration, and spectrum. J. Algebraic Geom. 14(2), 269–282 (2005)
Casas-Alvero, E.: Singularities of Plane Curves. London Mathematical Society. Lecture Notes Series, vol. 276. Cambridge University Press, Cambridge (2000)
Cassou-Noguès, P.: Polynôme de Bernstein générique. Abh. Math. Semin. Univ. Hambg. 58(1), 103–124 (1988)
Clemens, C.H.: Picard–Lefschetz theorem for families of nonsingular algebraic varieties acquiring ordinary singularities. Trans. Am. Math. Soc. 136, 93–108 (1969)
Deligne, P., Katz, N.: Séminaire de Géométrie Algébrique du Bois-Marie (1967/69); SGA 7 II. Lecture Notes in Mathematics, Springer, Berlin (1973)
Deligne, P., Mostow, G.D.: Monodromy of hypergeometric functions and nonlattice integral monodromy. Inst. Hautes Études Sci. Publ. Math. 63, 5–89 (1986)
Ein, L., Lazarsfeld, R., Smith, K.E., Varolin, D.: Jumping coefficients of multiplier ideals. Duke Math. J. 123(3), 469–506 (2004)
GrothendieckGrothendieck, A.: Séminaire de Géométrie Algébrique du Bois-Marie (1967/69); SGA 7 I. Lecture Notes in Mathematics, vol. 288. Springer, Berlin (1972)
Hartshorne, R.: Algebraic Geometry. Graduate Texts in Mathematics, vol. 52. Springer, Berlin (1977)
Kashiwara, M.: \({B}\)-functions and holonomic systems. Invent. Math. 38(1), 33–53 (1976)
Kato, M.: The \(b\)-function of a \(\mu \)-constant deformation of \(x^7+y^5\). Bull. College Sci. Univ. Ryukyus 32, 5–10 (1981)
Kato, M.: The \(b\)-function of a \(\mu \)-constant deformation of \(x^9+y^4\). Bull. College Sci. Univ. Ryukyus 33, 5–8 (1982)
Lichtin, B.: Some algebro-geometric formulae for poles of \(|f(x, y)|^s\). Am. J. Math. 107(1), 139–162 (1985)
Lichtin, B.: An Upper Semicontinuity Theorem for Some Leading Poles of \(|f|^{2s}\), Complex Analytic Singularities. Advanced Studies in Pure Mathematics, pp. 241–272. North-Holland, Amsterdam (1986)
Lichtin, B.: Poles of \(|f(z, w)|^{2s}\) and roots of the \(B\)-function. Ark. Mat. 27(1–2), 283–304 (1989)
Loeser, F.: Fonctions d’Igusa \(p\)-adiques et polynômes de Bernstein. Am. J. Math. 110(1), 1–21 (1988)
Malgrange, B.: Intégrales asymptotiques et monodromie. Ann. Sci. École Norm. Sup. (4) 7(3), 405–430 (1974)
Malgrange, B.: Sur les polynômes de I. N. Bernstein. Russ. Math. Surv. 29(4), 81–88 (1974)
Malgrange, B.: Le polynôme de Bernstein d’une singularité isolée. Lecture Notes Math. 4, 98–119 (1975)
Malgrange, B., Polynôme de Bernstein-Sato et cohomologie évanescente. Analysis and topology on singular spaces, II, III (Luminy, 1981), Astérisque), vol. 101–102, pp. 243–267. Soc. Math. France, Paris (1983)
Milnor, J.: Singular Points of Complex Hypersurfaces. Annals of Mathematics Studies, Princeton University Press, Princeton, N.J. (1968)
Saito, M.: On microlocal \(b\)-function. Bull. Soc. Math. France 122, 163–184 (1994)
Sato, M., Shintani, T.: Theory of prehomogeneous vector spaces (algebraic part)–the English translation of Sato’s lecture from Shintani’s note. Nagoya Math. J. 120, 1–34 (1990)
Sebastiani, M.: Preuve d’une conjecture de Brieskorn. Manuscripta Math. 2, 301–308 (1970)
Spanier, E.H.: Algebraic Topology. Springer, Berlin (1981)
Steenbrink, J.H.M., Mixed Hodge structure on the vanishing cohomology. Real and complex singularities (Oslo, 1976). Proceedings of Ninth Nordic Summer School/NAVF Symposium in Mathematics, pp. 525–563. Sijthoff and Noordhoff, Alphen aan den Rijn (1977)
Steenbrink, J.H.M.: The spectrum of hypersurface singularities. Actes du Colloque de Théorie de Hodge (Luminy, 1987). Astérisque, vol. 179–180, pp. 163–184. Soc. Math. France, Paris (1989)
Teissier, B.: Appendix, in [47] (1986)
Tráng, L.: Sur les noeuds algébriques. Compos. Math. 25(3), 281–321 (1972)
Tráng, L., Ramanujam, C.P.: The invariance of Milnor’s number implies the invariance of the topological type. Am. J. Math. 98(1), 67–78 (1976)
Varchenko, A.N.: Gauss–Manin connection of isolated singular point and Bernstein polynomial. Bull. Sci. Math. (2) 104, 205–223 (1980)
Varchenko, A.N.: Asymptotic Hodge structure in the vanishing cohomology. Math. USSR-Izv. 18(3), 469–512 (1982)
Wall, C.T.C.: Singular Points of Plane Curves. London Mathematical Society Student Texts, vol. 63. Cambridge University Press, Cambridge (2004)
Yano, T.: Exponents of singularities of plane irreducible curves. Sci. Rep. Saitama Univ. Ser. 10(2), 21–28 (1982)
Zariski, O.: On the topology of algebroid singularities. Am. J. Math. 54(3), 453–465 (1932)
Zariski, O.: Studies in equisingularity I. Equivalent wingularities of plane algebroid curves. Am. J. Math. 87(2), 507–536 (1965)
Zariski, O.: Le problème des modules pour les branches planes. Hermann, Paris (1986)
Acknowledgements
The author would like to thank his advisors, Maria Alberich-Carramiñana and Josep Àlvarez Montaner, for the fruitful discussions, the helpful comments and suggestions, and the constant support during the development of this work. The author would also like to thank Ben Lichtin for providing many helpful comments on a first draft of this work.
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The author was supported by the grants Ministerio de Economía y Competitividad MTM2015-69135-P, Generalitat de Catalunya 2017SGR-932 and Agencia Estatal de Investigación PID2019-103849GB-I00. The author is supported by a Postdoctoral Fellowship of the Research Foundation – Flanders.
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Blanco, G. Yano’s conjecture. Invent. math. 226, 421–465 (2021). https://doi.org/10.1007/s00222-021-01052-2
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DOI: https://doi.org/10.1007/s00222-021-01052-2