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Displaying 21 – 39 of 39

Some zero-dimensional generic singularities ; finite algebras having small tangent space

A. Iarrobino, J. Emsalem (1978)

Compositio Mathematica

Spezielle Algebren und transitive Operationen.

Franz Pauer (1978)

Mathematische Zeitschrift

Star operations in extensions of integral domains

David F. Anderson, Said El Baghdadi, Muhammad Zafrullah (2010)

Actes des rencontres du CIRM

An extension $D \subseteq R$ of integral domains is strongly $t$ -compatible (resp., $t$ -compatible) if ${(I R)}^{- 1} = {(I^{- 1} R)}_{v}$ (resp., ${(I R)}_{v} = {(I_{v} R)}_{v})$ for every nonzero finitely generated fractional ideal $I$ of $D$ . We show that strongly $t$ -compatible implies $t$ -compatible and give examples to show that the converse does not hold. We also indicate situations where strong $t$ -compatibility and its variants show up naturally. In addition, we study integral domains $D$ such that $D \subseteq R$ is strongly $t$ -compatible (resp., $t$ -compatible) for every overring $R$ of $D$ .

Stiff derivations of commutative rings

Andrzej Nowicki (1984)

Colloquium Mathematicae

Subintegrality, invertible modules and the Picard group

Leslie G. Roberts, Balwant Singh (1993)

Compositio Mathematica

Submersions and effective descent of étale morphisms

David Rydh (2010)

Bulletin de la Société Mathématique de France

Using the flatification by blow-up result of Raynaud and Gruson, we obtain new results for submersive and subtrusive morphisms. We show that universally subtrusive morphisms, and in particular universally open morphisms, are morphisms of effective descent for the fibered category of étale morphisms. Our results extend and supplement previous treatments on submersive morphisms by Grothendieck, Picavet and Voevodsky. Applications include the universality of geometric quotients and the elimination...

Submodules of secondary modules.

Atani, Shahabaddin Ebrahimi (2002)

International Journal of Mathematics and Mathematical Sciences

Subrings in trigonometric polynomial rings.

Shah, Tariq, Ullah, Ehsan (2009)

Acta Mathematica Academiae Paedagogicae Nyí regyháziensis. New Series [electronic only]

Sulla proprietà di estensione in anelli noetheriani

Tomaso Millevoi, Antonio Veluscek (1978)

Rendiconti del Seminario Matematico della Università di Padova

Supplement to the paper "Improper intersections in complex analytic geometry" (Dissertationes Math. 391 (2001))

Krzysztof Jan Nowak (2001)

Annales Polonici Mathematici

Sur deux conjectures de Small

J.-D. Therond (1976)

Mémoires de la Société Mathématique de France

Sur la cohomologie des formes quadratiques

Antonio Paques (1979)

Mémoires de la Société Mathématique de France

Sur la composition des polynômes

Pierre Tortrat (1988)

Colloquium Mathematicae

Sur la linéarité de la fonction de Artin

Guillaume Rond (2005)

Annales scientifiques de l'École Normale Supérieure

Sur la structure du groupe d'automorphismes de certaines surfaces affines.

Stéphane Lamy (2005)

Publicacions Matemàtiques

We describe the structure of the group of algebraic automorphisms of the following surfaces 1) P1,k x P1,k minus a diagonal; 2) P1,k x P1,k minus a fiber. The motivation is to get a new proof of two theorems proven respectively by L. Makar-Limanov and H. Nagao. We also discuss the structure of the semi-group of polynomial proper maps from C2 to C2.

Sur les Extensions Triviales Commutatives

Farid Kourki (2009)

Annales mathématiques Blaise Pascal

Nous caractérisons les extensions triviales semiGoldie, de cogénération finie, mininjectives et quasi-Frobeniusiens. Comme application, nous montrons que tout anneau noethérien s’injecte dans un anneau quasi-Frobeniusien.

Currently displaying 21 – 39 of 39