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101 papers · 1 filter
Detection of solar-like oscillations from Kepler photometry of the open cluster NGC 6819
Dennis Stello, Sarbani Basu, Hans Bruntt +49
Asteroseismology of stars in clusters has been a long-sought goal because the assumption of a common age, distance and initial chemical composition allows strong tests of the theor…
Conducting-angle-based percolation in the XY model
Yancheng Wang, Wenan Guo, Bernard Nienhuis +1
We define a percolation problem on the basis of spin configurations of the two dimensional XY model. Neighboring spins belong to the same percolation cluster if their orientations…
Twisted exponential sums of polynomials in one variable
Chunlei Liu, Wenxin Liu
The twisted -adic exponential sum associated to a polynomial in one variable is studied. An explicit arithmetic polygon in terms of the highest two exponents of the polynomial i…
Noether Symmetry Approach in "Cosmic Triad" Vector Field Scenario
Yi Zhang, Yun-gui Gong, Zong-Hong Zhu
To realize the accelerations in the early and late periods of our universe, we need to specify potentials for the dominant fields. In this paper, by using the Noether symmetry appr…
Five-dimensional metric gravity and the accelerated universe
Biao Huang, Song Li, Yongge Ma
The metric theories of gravity are generalized to five-dimensional spacetimes. By assuming a hypersurface-orthogonal Killing vector field representing the compact fifth dime…
Derived equivalences for -Auslander-Yoneda algebras
Wei Hu, Changchang Xi
In this paper, we introduce -Auslander-Yoneda algebras in a triangulated category with a parameter set in , and provide a method to construct new derived equivale…