[Sur le type d'homéomorphisme des espaces de valuations]
Soit X une variété algébrique définie sur un corps algébriquement clos. On étudie la fibre de l'espace de Riemann–Zariski au-dessus d'un point fermé . Si x est régulier, on démontre que son type d'homéomorphisme ne dépend que de la dimension de X. Si x est un point singulier d'une surface normale, on démontre qu'il ne dépend que de la classe du graphe d'une bonne résolution de modulo une relation d'équivalence précise. Ces deux résultats sont aussi vrais pour l'entrelac non archimédien normalisé de x dans X.
Let X be an algebraic variety defined over an algebraically closed field. We study the fiber of the Riemann–Zariski space above a closed point . If x is regular, we prove that its homeomorphism type only depends on the dimension of X. If x is a singular point of a normal surface, we show that it only depends on the dual graph of a good resolution of up to some precise equivalence. Both results also hold for the normalized non-Archimedean link of x in X.
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Ana Belén de Felipe 1
@article{CRMATH_2015__353_6_541_0,
author = {Ana Bel\'en de Felipe},
title = {On the homeomorphism type of some spaces of valuations},
journal = {Comptes Rendus. Math\'ematique},
pages = {541--544},
publisher = {Elsevier},
volume = {353},
number = {6},
year = {2015},
doi = {10.1016/j.crma.2015.03.015},
language = {en},
}
Ana Belén de Felipe. On the homeomorphism type of some spaces of valuations. Comptes Rendus. Mathématique, Volume 353 (2015) no. 6, pp. 541-544. doi : 10.1016/j.crma.2015.03.015. https://comptes-rendus.academie-sciences.fr/mathematique/articles/10.1016/j.crma.2015.03.015/
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