Results 21 to 30 of about 2,515 (87)

Quantum solvable algebras. Ideals and representations at roots of 1

open access: yes, 2002
There studed correspondence between symplectic leaves, irreducible representations and prime ideals, which is invariant with respect to quantum adjoint action.
Panov, A. N.
core   +2 more sources

Poles of regular quaternionic functions

open access: yes, 2008
This paper studies the singularities of Cullen-regular functions of one quaternionic variable. The quaternionic Laurent series prove to be Cullen-regular. The singularities of Cullen-regular functions are thus classified as removable, essential or poles.
Brackx F   +11 more
core   +2 more sources

EFSA scientific report on dietary exposure to lead in the European population

open access: yesEFSA Journal, Volume 23, Issue 8, August 2025.
Abstract Following a request of the European Commission and the need for a joint assessment identified by the European Environmental Agency, the EFSA estimated the chronic dietary exposure to lead in the European population, updating the results of the 2012 assessment.
European Food Safety Authority (EFSA)   +3 more
wiley   +1 more source

Agile Free‐Form Signal Filtering and Routing with a Chaotic‐Cavity‐Backed Non‐Local Programmable Metasurface

open access: yesAdvanced Science, Volume 12, Issue 16, April 24, 2025.
A multi‐parameter‐tunable, all‐metallic, low‐loss, wave‐chaotic cavity enables a frequency‐insensitive (over a 7 GHz bandwidth) technique to synthesize desired transfer functions within smaller windows to high accuracy and with complete reconfigurability of shapes and center frequencies.
Fabian T. Faul   +4 more
wiley   +1 more source

Nakayama automorphisms of double Ore extensions of Koszul regular algebras

open access: yes, 2016
Let $A$ be a Koszul Artin-Schelter regular algebra and $\sigma$ an algebra homomorphism from $A$ to $M_{2\times 2}(A)$. We compute the Nakayama automorphisms of a trimmed double Ore extension $A_P[y_1, y_2; \sigma]$ (introduced in \cite{ZZ08}).
Van Oystaeyen, Fred   +2 more
core   +1 more source

African Americans with a family history of cardiovascular disease show lower endothelial‐dependent vasodilation

open access: yesPhysiological Reports, Volume 13, Issue 7, April 2025.
Abstract Normotensive African Americans (AAs) show attenuated vascular responses and reduced nitric oxide (NO) bioavailability compared to European Americans (EAs). Few studies have used diverse measures to examine differences in macrovascular function and structure in individuals with a family history of CV disease (CVD). We assessed 150 AAs (Mage, 23.
Julian F. Thayer   +6 more
wiley   +1 more source

Non‐causal and non‐invertible ARMA models: Identification, estimation and application in equity portfolios

open access: yesJournal of Time Series Analysis, Volume 46, Issue 2, Page 325-352, March 2025.
The mixed causal‐non‐causal invertible‐non‐invertible autoregressive moving‐average (MARMA) models have the advantage of incorporating roots inside the unit circle, thus adjusting the dynamics of financial returns that depend on future expectations. This article introduces new techniques for estimating, identifying and simulating MARMA models. Although
Alain Hecq, Daniel Velasquez‐Gaviria
wiley   +1 more source

Rigidity of quantum algebras

open access: yesJournal of the London Mathematical Society, Volume 111, Issue 3, March 2025.
Abstract Given an associative C$\mathbb {C}$‐algebra A$A$, we call A$A$ strongly rigid if for any pair of finite subgroups of its automorphism groups G,H$G, H$, such that AG≅AH$A^G\cong A^H$, then G$G$ and H$H$ must be isomorphic. In this paper, we show that a large class of filtered quantizations are strongly rigid.
Akaki Tikaradze
wiley   +1 more source

Gromov–Witten invariants of bielliptic surfaces

open access: yesJournal of the London Mathematical Society, Volume 111, Issue 2, February 2025.
Abstract Bielliptic surfaces appear as a quotient of a product of two elliptic curves and were classified by Bagnera–Franchis. We give a concrete way of computing their GW‐invariants with point insertions using a floor diagram algorithm. Using the latter, we are able to prove the quasi‐modularity of their generating series by relating them to ...
Thomas Blomme
wiley   +1 more source

Primitivity in skew Laurent polynomial rings and related rings

open access: yesMathematische Zeitschrift, 1993
Necessary and sufficient conditions for the primitivity of a skew Laurent polynomial ring over a commutative Noetherian ring are given, with explicit constructions of simple faithful modules. In two papers [Glasg. Math. J. 18, 93-97 (1977; Zbl 0347.16020) and ibid. 19, 79-85 (1978; Zbl 0374.16004)], the author gave sufficient conditions for primitivity
openaire   +2 more sources

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