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- Chinese Academy of SciencesCN99 papers
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14 papers · 1 filter
Optimal Point Movement for Covering Circular Regions
Danny Z. Chen, Xuehou Tan, Haitao Wang +1
Given points in a circular region in the plane, we study the problems of moving the points to its boundary to form a regular -gon such that the maximum (min-max) or…
Extremal ergodic measures and the finiteness property of matrix semigroups
Xiongping Dai, Yu Huang, Mingqing Xiao
Let $\bS=\{S_1,...,S_K\}$ be a finite set of complex matrices and the compact space of all one-sided infinite sequences $i_{\bcdot}\colon\mathbb{N}\ri…
Chebyshev's inequality for Banach-space-valued random elements
Ling Zhou, Ze-Chun Hu
In this paper, we obtain a new generalization of Chebyshev's inequality for random elements taking values in a separate Banach space.
Art of spin decomposition
Xiang-Song Chen, Wei-Min Sun, Fan Wang +1
We analyze the problem of spin decomposition for an interacting system from a natural perspective of constructing angular momentum eigenstates. We split, from the total angular mom…
First Evidence of Coexisting EIT Wave and Coronal Moreton Wave from SDO/AIA Observations
P. F. Chen, Y. Wu
"EIT waves" are a globally propagating wavelike phenomenon. They were often interpreted as a fast-mode magnetoacoustic wave in the corona, despite various discrepancies between the…
Constraining the Emissivity of Ultrahigh Energy Cosmic Rays in the Distant Universe with the Diffuse Gamma-ray Emission
Xiang-Yu Wang, Ruo-Yu Liu, Felix Aharonian
Ultra-high cosmic rays (UHECRs) with energies >10^19 eV emitted at cosmological distances will be attenuated by cosmic microwave and infrared background radiation through photohadr…