Results 11 to 20 of about 12,663,351 (362)

The ascending central series of nilpotent Lie algebras with complex structure [PDF]

open access: yesTransactions of the American Mathematical Society, 2017
We obtain several restrictions on the terms of the ascending central series of a nilpotent Lie algebra g \mathfrak {g} under the presence of a complex structure J J .
Adela Latorre, L. Ugarte, R. Villacampa
semanticscholar   +6 more sources

LOWER CENTRAL SERIES AND FREE RESOLUTIONS OF HYPERPLANE ARRANGEMENTS [PDF]

open access: yes, 2001
If M is the complement of a hyperplane arrangement, and A = H ∗ (M, k) is the cohomology ring of M over a field of characteristic 0, then the ranks, k, of the lower central series quotients of 1(M) can be computed from the Betti numbers, bii = dimTor A
H. Schenck, Alexander I. Suciu
semanticscholar   +6 more sources

Central Apnea in Patients with COVID-19 Infection

open access: yesJ, 2023
Background: The Coronavirus Disease 2019 (COVID-19) is a global pandemic that has killed over 1.5 million people worldwide. A constellation of multisystem involvement with SARS-CoV-2 has been reported.
Vikram Venkata Puram   +6 more
doaj   +1 more source

Streamflow prediction using a hybrid methodology based on variational mode decomposition (VMD) and machine learning approaches

open access: yesApplied Water Science, 2023
The optimal management of water resources depends on accurate and reliable streamflow prediction. Therefore, researchers have become interested in the development of hybrid approaches in recent years to enhance the performance of modeling techniques for ...
Farshad Ahmadi   +2 more
doaj   +1 more source

Fundamental Groups of Real Arrangements and Torsion in the Lower Central Series Quotients [PDF]

open access: yesExperimental Mathematics, 2017
By using computer assistance, we prove that the fundamental group of the complement of a real complexified line arrangement is not determined by its intersection lattice, providing a counter-example for a problem of Falk and Randell.
Enrique Artal Bartolo   +2 more
semanticscholar   +1 more source

Growth estimates for the maximal term and central exponent of the derivative of a Dirichlet series

open access: yesKarpatsʹkì Matematičnì Publìkacìï, 2020
Let $A\in(-\infty,+\infty]$, $\Phi:[a,A)\to\mathbb{R}$ be a continuous function such that $x\sigma-\Phi(\sigma)\to-\infty$ as $\sigma\uparrow A$ for every $x\in\mathbb{R}$, $\widetilde{\Phi}(x)=\max\{x\sigma -\Phi(\sigma):\sigma\in [a,A)\}$ be the Young ...
S.I. Fedynyak, P.V. Filevych
doaj   +1 more source

Clinical features and novel presentations of human monkeypox in a central London centre during the 2022 outbreak: descriptive case series

open access: yesBritish medical journal, 2022
Objective To characterise the clinical features of monkeypox infection in humans. Design Descriptive case series. Setting A regional high consequences infectious disease centre with associated primary and secondary care referrals, and affiliated sexual ...
Aatish Patel   +22 more
semanticscholar   +1 more source

CA-discharge: Geo-Located Discharge Time Series for Mountainous Rivers in Central Asia

open access: yesScientific Data, 2023
We present a collection of 295 gauge locations in mountainous Central Asia with norm discharge as well as time series of river discharge from 135 of these locations collected from hydrological yearbooks in Central Asia.
Beatrice Marti   +6 more
doaj   +1 more source

Groups with finiteness conditions on the lower central series of non-normal subgroups [PDF]

open access: yes, 2016
It is known that any locally graded group with finitely many derived subgroups of non-normal subgroups is finite-by-abelian. This result is generalized here, by proving that in a locally graded group G the subgroup $$\gamma _{k}(G)$$γk(G) is finite if ...
F. D. Mari
semanticscholar   +1 more source

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