Holomorphe Differentialformen auf algebraischen Varietäten mit Singularitäten I
Tóm tắt
Let X be a projective algebraic variety over ℂ of dimension d, reduced and irreducible. In this paper we propose a definition for differential forms w of degree d on X to be holomorphic at an arbitrary point of X (which may be a singular point). It will be shown that the holomorphic d-forms define a sheaf ωX, which coincides with the usual sheaf of holomorphic d-forms ωX in case X has no singularities. Moreover, ωX is isomorphic to the canonical sheaf
of Grothendieck [5]:
, (if X is a closed subvariety of ℙn). Thus in the Serre duality theorem for projective varieties with singularities
may be replaced by ωX.
Tài liệu tham khảo
R. BERGER, R. KIEHL, E. KUNZ u. H.J. NASTOLD: Differentialrechnung in der analytischen Geometrie. Lecture Notes in Mathematics 38 (1967), Springer-Verlag
R. BERGER: Differenten regulärer Ringe. Jour. reine ang. Math. 214/215 (1964), 441–442
R. BERGER: Differentialmoduln eindimensionaler lokaler Ringe. Math. Z. 81 (1963), 326–354
N. BOURBAKI: Algèbre commutative, Chap. 1–2. Paris 1961, Hermann
A. GROTHENDIECK: Théorèmes de dualité pour les faisceaux algébriques cohérents. Sém. Bourbaki 1957, Exp. 149
R. HARTSHORNE: Residues and duality. Lecture Notes in Mathematics 20 (1966), Springer-Verlag
J. HERZOG, u. E. KUNZ: Der kanonische Modul eines Cohen-Macaulay Rings. Lecture Notes in Mathematics 238 (1971), Springer-Verlag
E. KUNZ: Differentialformen inseparabler algebraischer Funktionenkörper. Math. Z. 76 (1961), 56–74
E. KUNZ: Arithmetische Anwendungen der Differentialalgebren. Jour. reine ang. Math. 214/215 (1964), 276–320
J. LIPMAN: On the jacobien ideal of the module of differentials. Proc. Amer. Math. Soc. 21 (1969), 422–426
J.P. SERRE: Géométrie algèbrique et géométrie analytique. Ann. de l'Institut Fourier 6 (1955/56), 1–42
J.P. SERRE: Groupes algébriques et corps des classes. Paris 1959, Hermann