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Du Bois invariants of isolated complete intersection singularities

Joseph H. M. Steenbrink (1997)

Annales de l'institut Fourier

We define Du Bois invariants for isolated singularities of complex spaces. We relate them to the Hodge numbers of the local and vanishing cohomology groups. Our main results express the Tjurina number of certain Gorenstein singularities in terms of Du Bois invariants and Hodge numbers of the link, and express the Hodge numbers of the Milnor fibre of certain three-dimensional complete intersections in similar terms. We also address the question of the semicontinuity of the Du Bois invariants under...

Dualité et comparaison pour les complexes de de Rham logarithmiques par rapport aux diviseurs libres

Francisco Javier Calderón Moreno, Luis Narváez Macarro (2005)

Annales de l’institut Fourier

Soit X une variété analytique complexe lisse et D X un diviseur libre. Les connexions logarithmiques intégrables par rapport à D peuvent être étudiées comme des 𝒪 X -modules localement libres munis d’une structure de module (à gauche) sur l’anneau 𝒟 X ( log D ) des opérateurs différentiels logarithmiques . Dans cet article nous étudions deux résultats liés : la relation entre les duaux d’une connexion logarithmique intégrable sur les anneaux de base 𝒟 X et 𝒟 X ( log D ) , et un critère différentiel pour le théorème de comparaison...

Dynamics of meromorphic maps with small topological degree III: geometric currents and ergodic theory

Jeffrey Diller, Romain Dujardin, Vincent Guedj (2010)

Annales scientifiques de l'École Normale Supérieure

We continue our study of the dynamics of mappings with small topological degree on projective complex surfaces. Previously, under mild hypotheses, we have constructed an ergodic “equilibrium” measure for each such mapping. Here we study the dynamical properties of this measure in detail: we give optimal bounds for its Lyapunov exponents, prove that it has maximal entropy, and show that it has product structure in the natural extension. Under a natural further assumption, we show that saddle points...

Dynamics of one-resonant biholomorphisms

Filippo Bracci, Dmitri Zaitsev (2013)

Journal of the European Mathematical Society

Our first main result is a construction of a simple formal normal form for holomorphic diffeomorphisms in C n whose differentials have one-dimensional family of resonances in the first m eigenvalues, m n (but more resonances are allowed for other eigenvalues). Next, we provide invariants and give conditions for the existence of basins of attraction. Finally, we give applications and examples demonstrating the sharpness of our conditions.

Dynamics of symmetric holomorphic maps on projective spaces.

Kohei Ueno (2007)

Publicacions Matemàtiques

We consider complex dynamics of a critically finite holomorphic map from Pk to Pk, which has symmetries associated with the symmetric group Sk+2 acting on Pk, for each k ≥1. The Fatou set of each map of this family consists of attractive basins of superattracting points. Each map of this family satisfies Axiom A.

Dynamics semi-conjugated to a subshift for some polynomial mappings in C2.

Gabriel Vigny (2007)

Publicacions Matemàtiques

We study the dynamics near infinity of polynomial mappings f in C2. We assume that f has indeterminacy points and is non constant on the line at infinity L∞. If L∞ is f-attracting, we decompose the Green current along itineraries defined by the indeterminacy points and their preimages. The symbolic dynamics that arises is a subshift on an infinite alphabet.

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