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Displaying 81 – 100 of 372

A Norm for Modules and Algebras.

Manuel Ojanguren, Max-Albert Knus (1975)

Mathematische Zeitschrift

A Note About the Nowicki Conjecture on Weitzenböck Derivations

Bedratyuk, Leonid (2009)

Serdica Mathematical Journal

2000 Mathematics Subject Classification: 13N15, 13A50, 16W25.We reduce the Nowicki conjecture on Weitzenböck derivations of polynomial algebras to a well known problem of classical invariant theory.

A Note On A Class Of Noetherian Rings

Ravinder Kumar, Kanchan Manaktala (1975)

Publications de l'Institut Mathématique

A note on a class of Noetherian rings.

R. Kumar, K. Manaktala (1975)

Publications de l'Institut Mathématique [Elektronische Ressource]

A Note on a Paper by Miyazaki.

Ralf Fröberg (1995)

Mathematica Scandinavica

A note on Abhyankar-Moh's approximate roots of polynomials.

Brzostowski, Szymon (2007)

Zeszyty Naukowe Uniwersytetu Jagiellońskiego. Universitatis Iagellonicae Acta Mathematica

A note on approximation theorems

Jiří Močkoř (1979)

Archivum Mathematicum

A note on basic free modules and the $S_{n}$ condition.

Marcelo, Agustín, Marcelo, Félix, Rodríguez, César (2006)

Portugaliae Mathematica. Nova Série

A note on Bézout's theorem

Sławomir Rams, Piotr Tworzewski, Tadeusz Winiarski (2005)

Annales Polonici Mathematici

We present a version of Bézout's theorem basing on the intersection theory in complex analytic geometry. Some applications for products of surfaces and curves are also given.

A note on characterizations of rings of constants with respect to derivations

Piotr Jędrzejewicz (2004)

Colloquium Mathematicae

Let A be a commutative algebra without zero divisors over a field k. If A is finitely generated over k, then there exist well known characterizations of all k-subalgebras of A which are rings of constants with respect to k-derivations of A. We show that these characterizations are not valid in the case when the algebra A is not finitely generated over k.

A Note on Derivations of Commutative Rings.

Surender K. Gupta (1974)

Mathematische Zeitschrift

A Note on Elementary Derivations

Khoury, Joseph (2004)

Serdica Mathematical Journal

2000 Mathematics Subject Classification: Primary: 14R10. Secondary: 14R20, 13N15.Let R be a UFD containing a field of characteristic 0, and Bm = R[Y1, . . . , Ym] be a polynomial ring over R. It was conjectured in [5] that if D is an R-elementary monomial derivation of B3 such that ker D is a finitely generated R-algebra then the generators of ker D can be chosen to be linear in the Yi ’s. In this paper, we prove that this does not hold for B4. We also investigate R-elementary derivations D of Bm...

A note on extensions of algebraic and formal gorups I.

Noriyuki Suwa, Tsutomu Sekiguchi (1991)

Mathematische Zeitschrift

A note on extensions of algebraic and formal groups II.

Noriyuki Suwa, Tsutomu Sekiguchi (1994)

Mathematische Zeitschrift

A note on finitely generated commutative rings

Marian Kechlibar, Tomáš Kepka, Juha Kortelainen (2005)

Acta Universitatis Carolinae. Mathematica et Physica

A note on formal groups and zeta functions.

Noriko Yui (1978)

Journal für die reine und angewandte Mathematik

A note on formal power series

Xiao-Xiong Gan, Dariusz Bugajewski (2010)

Commentationes Mathematicae Universitatis Carolinae

In this note we investigate a relationship between the boundary behavior of power series and the composition of formal power series. In particular, we prove that the composition domain of a formal power series $g$ is convex and balanced which implies that the subset ${\bar{𝕏}}_{g}$ consisting of formal power series which can be composed by a formal power series $g$ possesses such properties. We also provide a necessary and sufficient condition for the superposition operator $T_{g}$ to map ${\bar{𝕏}}_{g}$ into itself or to map $𝕏_{g}$ into...

A note on Frobenius divided modules in mixed characteristics

Pierre Berthelot (2012)

Bulletin de la Société Mathématique de France

If $X$ is a smooth scheme over a perfect field of characteristic $p$ , and if $𝒟_{X}^{(\infty)}$ is the sheaf of differential operators on $X$ [7], it is well known that giving an action of $𝒟_{X}^{(\infty)}$ on an $𝒪_{X}$ -module $ℰ$ is equivalent to giving an infinite sequence of $𝒪_{X}$ -modules descending $ℰ$ via the iterates of the Frobenius endomorphism of $X$ [5]. We show that this result can be generalized to any infinitesimal deformation $f : X \to S$ of a smooth morphism in characteristic $p$ , endowed with Frobenius liftings. We also show that it extends to adic...

A note on generalized primary rings

R. Chaudhuri (1976)

Matematički Vesnik

A note on imperfect monomial curves in $P^{3}$

Eduard Boďa, Štefan Solčan (1987)

Mathematica Slovaca

Currently displaying 81 – 100 of 372

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