Comptes Rendus
Algebraic geometry/Topology
Milnor and Tjurina numbers for a hypersurface germ with isolated singularity
[Nombres de Milnor et Tjurina pour les germes d'hypersurfaces à singularité isolée]
Comptes Rendus. Mathématique, Volume 356 (2018) no. 9, pp. 963-966.

Soit f:(Cn,0)(C,0) un germe de fonction analytique au voisinage de l'origine avec une seule singularité isolée. Soient μ et τ les nombres de Milnor et Tjurina correspondants. Nous montrons que μτn. Comme application, nous donnons une minoration du nombre de Tjurina en fonction de n et de la multiplicité de f à l'origine.

Assume that f:(Cn,0)(C,0) is an analytic function germ at the origin with only isolated singularity. Let μ and τ be the corresponding Milnor and Tjurina numbers. We show that μτn. As an application, we give a lower bound for the Tjurina number in terms of n and the multiplicity of f at the origin.

Reçu le :
Accepté le :
Publié le :
DOI : 10.1016/j.crma.2018.07.004
Yongqiang Liu 1

1 KU Leuven, Department of Mathematics, Celestijnenlaan 200B, 3001 Leuven, Belgium
@article{CRMATH_2018__356_9_963_0,
     author = {Yongqiang Liu},
     title = {Milnor and {Tjurina} numbers for a hypersurface germ with isolated singularity},
     journal = {Comptes Rendus. Math\'ematique},
     pages = {963--966},
     publisher = {Elsevier},
     volume = {356},
     number = {9},
     year = {2018},
     doi = {10.1016/j.crma.2018.07.004},
     language = {en},
}
TY  - JOUR
AU  - Yongqiang Liu
TI  - Milnor and Tjurina numbers for a hypersurface germ with isolated singularity
JO  - Comptes Rendus. Mathématique
PY  - 2018
SP  - 963
EP  - 966
VL  - 356
IS  - 9
PB  - Elsevier
DO  - 10.1016/j.crma.2018.07.004
LA  - en
ID  - CRMATH_2018__356_9_963_0
ER  - 
%0 Journal Article
%A Yongqiang Liu
%T Milnor and Tjurina numbers for a hypersurface germ with isolated singularity
%J Comptes Rendus. Mathématique
%D 2018
%P 963-966
%V 356
%N 9
%I Elsevier
%R 10.1016/j.crma.2018.07.004
%G en
%F CRMATH_2018__356_9_963_0
Yongqiang Liu. Milnor and Tjurina numbers for a hypersurface germ with isolated singularity. Comptes Rendus. Mathématique, Volume 356 (2018) no. 9, pp. 963-966. doi : 10.1016/j.crma.2018.07.004. https://comptes-rendus.academie-sciences.fr/mathematique/articles/10.1016/j.crma.2018.07.004/

[1] J. Briançon; H. Skoda Sur la clôture intégrale d'un idéal de germes de fonctions holomorphes en un point de Cn, C. R. Acad. Sci. Paris, Ser. A, Volume 278 (1974), pp. 949-951 (in French)

[2] A. Dimca Differential forms and hypersurface singularities, Singularity theory and its applications, Part I, Coventry, 1988/1989 (Lecture Notes in Mathematics), Volume vol. 1462, Springer, Berlin (1991), pp. 122-153

[3] A. Dimca; G.-M. Greuel On 1-forms on isolated complete intersection curve singularities | arXiv

[4] G.-M. Greuel; C. Lossen; E. Shustin Introduction to Singularities and Deformations, Springer Monographs in Mathematics, Springer, Berlin, 2007

[5] J. Huh Milnor numbers of projective hypersurfaces with isolated singularities, Duke Math. J., Volume 163 (2014), pp. 1525-1548

[6] A.G. Kouchnirenko Polyèdres de Newton et nombres de Milnor, Invent. Math., Volume 32 (1976) no. 1, pp. 1-31

[7] B. Malgrange Letter to the editors, Invent. Math., Volume 20 (1973), pp. 171-172

[8] K. Saito Quasihomogene isolierte Singularitäten von Hyperflächen, Invent. Math., Volume 14 (1971), pp. 123-142 (in German)

[9] J. Scherk On the monodromy theorem for isolated hypersurface singularities, Invent. Math., Volume 58 (1980) no. 3, pp. 289-301

[10] B. Teissier (Singularités à Cargèse. Asterisque), Volume vol. 7 et 8, Société mathématique de France, Paris (1973), pp. 285-362

[11] B. Teissier Sur une inégalité à la Minkowski pour les multiplicités, Ann. of Math. (2), Volume 106 (1977) no. 1, pp. 38-44

[12] J. Wahl A characterization of quasihomogeneous Gorenstein surface singularities, Compos. Math., Volume 55 (1985) no. 3, pp. 269-288

[13] S.S.-T. Yau; H. Zuo Complete characterization of isolated homogeneous hypersurface singularities, Pac. J. Math., Volume 273 (2015) no. 1, pp. 213-224

Cité par Sources :

Commentaires - Politique