Results 221 to 230 of about 253,823 (270)

Non-invasive physiological indicators of welfare in dairy cows. [PDF]

open access: yesAnim Welf
Kremer L   +7 more
europepmc   +1 more source

It's not just droplets: a systematic review and meta-analysis of the modes of transmission of Group A <i>Streptococcus</i>. [PDF]

open access: yesFront Public Health
Barth DD   +7 more
europepmc   +1 more source

Design of a phase II randomised, double-blind, placebo-controlled, dose-finding trial of BI 1819479 in patients with idiopathic pulmonary fibrosis. [PDF]

open access: yesERJ Open Res
Wuyts WA   +9 more
europepmc   +1 more source

Insight into the Carbon Monoxide Reduction Reaction on Cu(111) from Operando Electrochemical X-ray Photoelectron Spectroscopy. [PDF]

open access: yesAngew Chem Int Ed Engl
Davies B   +16 more
europepmc   +1 more source

Involution Satisfying an Engel Condition

Communications in Algebra, 2016
We are given a semiprime ring R with involution *. We show that the following conditions are equivalent. Condition 1: For each element x of R, [x*, x](=x*x − xx*) = 0. Condition 2: There is a fixed natural number N′ such that [x*, xN′] = 0, all elements x of R. Condition 3: There is a fixed natural number N such that for each element x of R, , where dx
openaire   +3 more sources

A Note on π-Engel Conditions

Southeast Asian Bulletin of Mathematics, 2001
For a set of primes \(\pi\), the concept of Engel conditions for finite groups is extended. For example an element \(g\) is a weakly right \(\pi\)-Engel element if for each \(\pi'\)-element \(x\) in the group \(G\) there is a positive integer \(n\) such that the \((n+1)\)-commutator \([x,g,\dots,g]\) is a \(\pi\)-element.
Fan, Yun, Hai, Jinke
openaire   +2 more sources

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