Results 1 to 10 of about 318 (63)

THE LIPMAN–ZARISKI CONJECTURE IN GENUS ONE HIGHER [PDF]

open access: yesForum of Mathematics, Sigma, 2020
We prove the Lipman–Zariski conjecture for complex surface singularities with $p_{g}-g-b\leqslant 2$. Here $p_{g}$ is the geometric genus, $g$ is the sum of the genera of exceptional curves and $b$ is the first Betti number of the dual graph.
HANNAH BERGNER, PATRICK GRAF
doaj   +4 more sources

A characterization of p-bases of rings of constants

open access: yesOpen Mathematics, 2013
We obtain two equivalent conditions for m polynomials in n variables to form a p-basis of a ring of constants of some polynomial K-derivation, where K is a UFD of characteristic p>0.
Jędrzejewicz Piotr
doaj   +2 more sources

Irreducible Jacobian derivations in positive characteristic

open access: yesOpen Mathematics, 2014
We prove that an irreducible polynomial derivation in positive characteristic is a Jacobian derivation if and only if there exists an n-1-element p-basis of its ring of constants. In the case of two variables we characterize these derivations in terms of
Jędrzejewicz Piotr
doaj   +3 more sources

Commutative bidifferential algebra [PDF]

open access: yesJournal of Algebra, 2021
. Motivated by the Poisson Dixmier-Moeglin equivalence problem, a systematic study of commutative unitary rings equipped with a biderivation , namely a binary operation that is a derivation in each argument, is here begun, with an eye toward the geometry
O. Sánchez, Rahim Moosa
semanticscholar   +1 more source

Recent developments in combinatorial aspects of normal ordering

open access: yesEnumerative Combinatorics and Applications, 2021
In this paper, we report on recent progress concerning combinatorial aspects of normal ordering. After giving a short introduction to the history and motivation of normal ordering, we present some recent developments.
M. Schork
semanticscholar   +1 more source

Treatment of equine sarcoids using recombinant poxviruses expressing feline interleukin‐2

open access: yesVeterinary Dermatology, Volume 32, Issue 3, Page 283-e77, June 2021., 2021
Background – Interleukin (IL)‐2 stimulates antitumour immunity and is successfully used for the treatment of different neoplasias. Hypothesis/Objectives –Canarypox virus locally expressing feline IL‐2 is safe and can be used to treat equine sarcoids. Conclusions –Treatment of equine sarcoids with recombinant canarypox virus expressing feline IL‐2 seems
Johanna Loschelder‐Ostrowski   +4 more
wiley   +1 more source

Almost partial generalized Jordan derivations: a fixed point approach

open access: yesJournal of Inequalities and Applications, 2012
Using fixed point method, we investigate the Hyers-Ulam stability and the superstability of partial generalized Jordan derivations on Banach modules related to Jensen type functional equations.Mathematics Subject Classification 2010: Primary, 39B52 ...
M. Gordji, Choonkill Park, Jung Rye Lee
semanticscholar   +2 more sources

Stability and superstability of generalized quadratic ternary derivations on non-Archimedean ternary Banach algebras: a fixed point approach

open access: yesFixed Point Theory and Applications, 2012
Using fixed point method, we prove the Hyers-Ulam stability and the superstability of generalized quadratic ternary derivations on non-Archimedean ternary Banach algebras.
Choonkill Park, M. Gordji, Y. Cho
semanticscholar   +1 more source

Some conditions under which Jordan derivations are zero

open access: yesJournal of Taibah University for Science, 2017
In the current article, we obtain the following results: Let A be an algebra and P be a semi-prime ideal of A. Suppose that d:A→(A/P) is a Jordan derivation such that dim{d(a)|a∈A}≤1. If d(P)={0}, then d is zero.
Z. Jokar, A. Hosseini, A. Niknam
doaj   +1 more source

Separating invariants for the basic G_a-actions [PDF]

open access: yes, 2010
We explicitly construct a finite set of separating invariants for the basic $\Ga$-actions. These are the finite dimensional indecomposable rational linear representations of the additive group $\Ga$ of a field of characteristic zero, and their invariants
Elmer, Jonathan, Kohls, Martin
core   +2 more sources

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