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of 2 167
pro vyhledávání: '"de Laat P"'
We prove that the $D_4$ root system (the set of vertices of the regular $24$-cell) is the unique optimal kissing configuration in $\mathbb R^4$, and is an optimal spherical code. For this, we use semidefinite programming to compute an exact optimal s
Externí odkaz:
http://arxiv.org/abs/2404.18794
We show that the spectral embeddings of all known triangle-free strongly regular graphs are optimal spherical codes (the new cases are $56$ points in $20$ dimensions, $50$ points in $21$ dimensions, and $77$ points in $21$ dimensions), as are certain
Externí odkaz:
http://arxiv.org/abs/2403.16874
Given a non-singular action $\Gamma \curvearrowright (X,\mu)$, we define the $*$-algebra $\mathbb C_{\rm fp}[\Gamma \curvearrowright X]$ of operators of finite dynamical propagation associated with this action. This assignment is completely canonical
Externí odkaz:
http://arxiv.org/abs/2308.07006
Autor:
Mesarcik, Michael, Boonstra, Albert-Jan, Iacobelli, Marco, Ranguelova, Elena, de Laat, Cees, van Nieuwpoort, Rob
Publikováno v:
A&A 680, A74 (2023)
As radio telescopes increase in sensitivity and flexibility, so do their complexity and data-rates. For this reason automated system health management approaches are becoming increasingly critical to ensure nominal telescope operations. We propose a
Externí odkaz:
http://arxiv.org/abs/2307.01054
Autor:
M. Liu, R. van der A, M. van Weele, L. Bryan, H. Eskes, P. Veefkind, Y. Liu, X. Lin, J. de Laat, J. Ding
Publikováno v:
Atmospheric Measurement Techniques, Vol 17, Pp 5261-5277 (2024)
An improved divergence method has been developed to estimate annual methane (CH4) emissions from TROPOspheric Monitoring Instrument (TROPOMI) observations. It has been applied to the period of 2018 to 2021 over the Middle East, where the orography is
Externí odkaz:
https://doaj.org/article/c9390c94065b42169de43ba4a0e07923
Autor:
Simone Watkins, Kim Ward, Rachel Brown, Sue Crengle, Monique WM de Laat, Teuila Percival, Lynn Sadler, Elza Cloete, Ruth Gorinski, Thomas Gentles, Frank H. Bloomfield
Publikováno v:
BMC Health Services Research, Vol 24, Iss 1, Pp 1-12 (2024)
Abstract Background Higher odds of survival have been reported in European infants compared to Indigenous Māori and Pasifika infants with critical congenital heart disease in New Zealand. We therefore aimed to understand how to mitigate this dispari
Externí odkaz:
https://doaj.org/article/a63668e9e1ae41e69c6275a73493ef1c
Let $G$ be a locally compact group with an open subgroup $H$ with the Kunze-Stein property, and let $\pi$ be a unitary representation of $H$. We show that the representation $\widetilde{\pi}$ of $G$ induced from $\pi$ is an $L^{p+}$-representation if
Externí odkaz:
http://arxiv.org/abs/2304.01079
We give universal bounds on the fraction of nontrivial zeros having given multiplicity for L-functions attached to a cuspidal automorphic representation of $\mathrm{GL}_m/\mathbb{Q}$. For this, we apply the higher-level correlation asymptotic of Hejh
Externí odkaz:
http://arxiv.org/abs/2303.01095
Autor:
de Laat, Tim, de la Salle, Mikael
We prove that all isometric actions of higher rank simple Lie groups and their lattices on arbitrary uniformly convex Banach spaces have a fixed point. This vastly generalises a recent breakthrough of Oppenheim. Combined with earlier work of Lafforgu
Externí odkaz:
http://arxiv.org/abs/2303.01405
Publikováno v:
Atmospheric Chemistry and Physics, Vol 24, Pp 4511-4535 (2024)
Denitrification within the stratospheric vortex is a crucial process for Antarctic ozone hole formation, resulting in an analogous stratospheric “nitrogen hole”. Sedimentation of large nitric acid trihydrate polar stratospheric cloud particles wi
Externí odkaz:
https://doaj.org/article/cfefe684d8b341a8b518f2fc2c64c390