Existentially closed domains with radical relations.
Explicit computations around the Lichtenbaum-Harshorne vanishing theorem.
Exponential Automorphisms of Complete Local Rings.
Exposé on a conjecture of Tougeron
An algebra homomorphism of the locatized affine rings of an algebraic variety is continuous in the Krull topology of the respective local rings. It is not necessarily open or closed in the Krull topology. However, we show that the induced map on the associated analytic local rings is also open and closed in the Krull topology. To do this we prove a conjecture of Tougeron which states that if is an analytic curve on an analytic variety and is a formal power series which is convergent when restricted...
Extended Rees Algebras and Mixed Multiplicities.
Extending Meromorphic Functions on a Grassmannian Variety.
Extension d'un théorème de Pólya-Cantor à des séries rationnelles en variables non commutatives
Extension of multilinear mappings on Banach spaces
Extension of semiclean rings
This paper aims at the study of the notions of periodic, UU and semiclean properties in various context of commutative rings such as trivial ring extensions, amalgamations and pullbacks. The results obtained provide new original classes of rings subject to various ring theoretic properties.
Extension of the Two-Variable Pierce-Birkhoff conjecture to generalized polynomials
Let be a continuous, piecewise-polynomial function. The Pierce-Birkhoff conjecture (1956) is that any such is representable in the form , for some finite collection of polynomials . (A simple example is .) In 1984, L. Mahé and, independently, G. Efroymson, proved this for ; it remains open for . In this paper we prove an analogous result for “generalized polynomials” (also known as signomials), i.e., where the exponents are allowed to be arbitrary real numbers, and not just natural numbers;...
Extensionless modules over tame hereditary algebras
Extensions algébriques et formes quadratiques
Extensions de valuation et polygone de Newton
Soient un corps valué et est une extension monogène finie de définie par , alors toute valuation de qui prolonge définit une pseudo-valuation de de noyau l’idéal . Nous savons associer à une famille de valuations de , appelée famille admissible, construite de façon explicite à partir de valuations augmentées et de valuations augmentées limites.Nous donnons une condition nécessaire et suffisante pour qu’une valuation de appartienne à la famille admissible associée à une pseudo-valuation...
Extensions factorielles
Extensions of radical operations to fractional ideals.
Extensions of toric varieties.
Extremal functions of the Nevanlinna-Pick problem and Douglas algebras
The Nevanlinna-Pick problem at the zeros of a Blaschke product B having a solution of norm smaller than one is studied. All its extremal solutions are invertible in the Douglas algebra D generated by B. If B is a finite product of sparse Blaschke products (Newman Blaschke products, Frostman Blaschke products) then so are all the extremal solutions. For a Blaschke product B a formula is given for the number C(B) such that if the NP-problem has a solution of norm smaller than C(B) then all its extremal...
Face numbers and nongeneric initial ideals.
Face vectors of two-dimensional Buchsbaum complexes.
Factorial extensions of regular local rings and invariants of finite groups.