O čtrnáctém Hilbertově problému
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Displaying 1 – 20 of 214
O pätnástom Hilbertovom probléme
Jan Čižmár (1974)
Pokroky matematiky, fyziky a astronomie
Observations on harmonic maps and singular varieties
Brendon Lasell, Mohan Ramachandran (1996)
Annales scientifiques de l'École Normale Supérieure
Obstructions to deforming curves on a -fold, II: Deformations of degenerate curves on a del Pezzo -fold
Hirokazu Nasu (2010)
Annales de l’institut Fourier
We study the Hilbert scheme of smooth connected curves on a smooth del Pezzo -fold . We prove that any degenerate curve , i.e. any curve contained in a smooth hyperplane section of , does not deform to a non-degenerate curve if the following two conditions are satisfied: (i) and (ii) for every line on such that , the normal bundle is trivial (i.e. ). As a consequence, we prove an analogue (for ) of a conjecture of J. O. Kleppe, which is concerned with non-reduced components...
On 2-Spannedness for the adjunction mapping.
E. Ballico, M. Beltrametti (1988)
Manuscripta mathematica
On a cell decomposition of the Hilbert scheme of points in the plane.
Geir Ellingsrud, Stein Arild Stromme (1988)
Inventiones mathematicae
On a conjecture of Mukai.
Jaroslaw A. Wisniewski (1990)
Manuscripta mathematica
On a generalization of Hilbert's 21st problem
Richard M. Hain (1986)
Annales scientifiques de l'École Normale Supérieure
On a Geometric Interpretation of Multiplicity.
C.P. Ramanujam (1973)
Inventiones mathematicae
On a linearity criterion for algebraic systems of divisors on a projective variety
Umberto Bartocci, Lucio Guerra (1987)
Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni
In the present paper, it is established in any characteristic the validity of a classical theorem of Enriques', stating the linearity of any algebraic system of divisors on a projective variety, which has index 1 and whose generic element is irreducible, as soon as its dimension is at least 2.
On a result of Farkas.
G. Martens, C. Keem, S. Kim (1990)
Journal für die reine und angewandte Mathematik
On a Special Class of Non Complete Webs
Julien Sebag (2010)
Annales de la faculté des sciences de Toulouse Mathématiques
In this article, we introduce a special class of non complete webs, the NN-webs. We also study the algebraic and geometric properties of these webs.
On a Theorem of Castelnuovo, and the Equations Defining Space Curves.
L. Gruson, C. Peskine, R. Lazarsfeld (1983)
Inventiones mathematicae
On an infinitesimal invariant of normal.
Xian Wu (1990)
Mathematische Annalen
On Automorphic Forms and Hodge Theory.
Jürgen Neukirch, Pilar Báyer (1981)
Mathematische Annalen
On Bertini's theorem.
Geng Xu (1996)
Manuscripta mathematica
On b-function, spectrum and rational singularity.
Morihiko Saito (1993)
Mathematische Annalen
On blowing down projective spaces in singular varieties.
Andrew John Sommese, Joseph Lipman (1985)
Journal für die reine und angewandte Mathematik
On Castelnuovo's equivalence defect.
Ernst Kani (1984)
Journal für die reine und angewandte Mathematik
On Chow rings of fine moduli spaces of modules.
Charles H. Walter, Alastair D. King (1995)
Journal für die reine und angewandte Mathematik
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