Results 101 to 110 of about 8,260 (218)

Mikhlin-Type H^p Multiplier Theorem on the Heisenberg Group

Axioms
The classical Fourier multiplier theorem by Mikhlin in Hardy spaces is extended to the Heisenberg group. The proof relies on the theories of atom and molecule functions and the property of special Hermite functions.
Jinsen Xiao, Jianxun He, Yingzhu Wu
doaj   +1 more source

A Hardy Inequality with Remainder Terms in the Heisenberg Group and the Weighted Eigenvalue Problem

Journal of Inequalities and Applications, 2007
Based on properties of vector fields, we prove Hardy inequalities with remainder terms in the Heisenberg group and a compact embedding in weighted Sobolev spaces. The best constants in Hardy inequalities are determined.
Zixia Yuan, Pengcheng Niu, Jingbo Dou
doaj   +1 more source

Volumetric Comparison of Overall Brain and Neuropil Size Between Social and Non‐social Spiders: Exploring the Social Brain Hypothesis

Integrative Zoology, EarlyView.
Brain size may be influenced by the cognitive demands of sociality (social brain hypothesis). We used microCT to compare CNS and brain volumes in social versus solitary huntsman and crab spiders. Social huntsman spiders had larger arcuate and mushroom bodies, while social crab spiders had larger visual neuropils.
Vanessa Penna‐Gonçalves, Donald James Mclean, Nikolas J. Willmott, Michael B. J. Kelly, Jay R. Black, Elizabeth C. Lowe, Marie E. Herberstein   +6 more
wiley   +1 more source

Blow-ups of minimal surfaces in the Heisenberg group

Analysis and Geometry in Metric Spaces
In this article, we revise Monti’s results on blow-ups of H-perimeter minimizing sets in Hn{{\mathbb{H}}}^{n}. Monti demonstrated that the Lipschitz approximation of the blow-up, after rescaling by the square root of the excess, converges to a limit ...
Yu Yonghao
doaj   +1 more source

Towards a Theory of Inquiry Dialogue Questions

Educational Theory, EarlyView.
Abstract The success of an inquiry dialogue depends on the quality of its central question. Yet, evaluating inquiry dialogue questions is harder than it appears. One approach is to maintain that inquiry dialogue questions are philosophical questions, but there is no successful method of identifying all and only philosophical questions. Another approach
Aaron Yarmel
wiley   +1 more source

The Heisenberg–Lorentz quantum group

Journal of Noncommutative Geometry, 2010
In this article we present a new C ^* -algebraic deformation of the Lorentz group. It is obtained by means of the Rieffel deformation applied to \mathrm{SL}(2,ℂ ...
openaire   +4 more sources

S‐Adenosylmethionine (SAM) hydrolases counter increased SAM epimerisation in thermophilic archaea

The FEBS Journal, EarlyView.
S‐Adenosyl‐l‐methionine (SAM) is a vital enzyme cofactor. Epimerisation at the sulfonium centre of biologically active (SS,SCα)‐SAM is driven by heat, yielding biologically inactive (RS,SCα)‐SAM. Here, two novel archaeal SAM hydrolases from the thermophilic Sulfolobus acidocaldarius and the halophilic Haloferax volcanii are shown to cleave (RS,SCα)‐SAM.
Agnes Bartels, Michael K. F. Mohr, Phillip Nußbaum, Marie Joest, Bianca Wassmer, Laurent Rasquin, Sonja‐Verena Albers, Jennifer N. Andexer   +7 more
wiley   +1 more source

THE FATHERS, COMPUTERS AND US

Modern Theology, EarlyView.
Abstract This essay, designed as a complement to opinions expressed by Rowan Williams and some speakers at the conference in his honour, explores features of early Christianity which suggest a positive evaluation of artificial intelligence. Noting that the fear of reducing humans to machines has been joined in the modern age by the fear that machines ...
Mark J. Edwards
wiley   +1 more source

On Heisenberg groups

It is known that an abelian group $A$ and a $2$-cocycle $c:A \times A \to C$ yield a group ${\mathscr{H}}(A,C,c)$ which we call a Heisenberg group. This group, a central extension of $A$, is the archetype of a class~$2$ nilpotent group. In this note, we prove that under mild conditions, any class~$2$ nilpotent group $G$ is equivalent as an extension of
openaire   +2 more sources

What does it mean to be a post‐Newtonian? Schelling on competing scientific models

The Southern Journal of Philosophy, EarlyView.
Abstract While Schelling's position has often been portrayed as highly critical of Newton, his discussion of Newton's theories has never been thoroughly studied. The goal of this paper is to analyze in more detail the relationship between Schelling and Newton, with an eye toward the fundamental question that guides Schelling: how can conflicts between ...
Raphaël Authier
wiley   +1 more source