Results 61 to 70 of about 5,511 (164)

The 2‐divisibility of divisors on K3 surfaces in characteristic 2

open access: yesMathematische Nachrichten, Volume 298, Issue 6, Page 1964-1988, June 2025.
Abstract We show that K3 surfaces in characteristic 2 can admit sets of n$n$ disjoint smooth rational curves whose sum is divisible by 2 in the Picard group, for each n=8,12,16,20$n=8,12,16,20$. More precisely, all values occur on supersingular K3 surfaces, with exceptions only at Artin invariants 1 and 10, while on K3 surfaces of finite height, only n=
Toshiyuki Katsura   +2 more
wiley   +1 more source

Pulling Back Theorem for Generalizing the Diagonal Averaging Principle in Symplectic Geometry Mode Decomposition and Singular Spectrum Analysis

open access: yes
18 pages, 6 figures, 5 ...
Zhang, Hong-Yan   +6 more
openaire   +2 more sources

Modal identification of wind turbine tower based on optimal fractional order statistical moments

open access: yesComputer-Aided Civil and Infrastructure Engineering, Volume 40, Issue 13, Page 1754-1768, 19 May 2025.
Abstract In vibration testing of civil engineering structures, the first two vibration modes are crucial in representing the global dynamic behavior of the structure measured. In the present study, a comprehensive method is proposed to identify the first two vibration modes of wind turbine towers, which is based on the analysis of fractional order ...
Yang Yang   +4 more
wiley   +1 more source

Symplectic Model Reduction of Hamiltonian Systems [PDF]

open access: yes, 2015
In this paper, a symplectic model reduction technique, proper symplectic decomposition (PSD) with symplectic Galerkin projection, is proposed to save the computational cost for the simplification of large-scale Hamiltonian systems while preserving the ...
Mohseni, Kamran, Peng, Liqian
core  

On the classical capacity of quantum Gaussian channels

open access: yes, 2011
The set of quantum Gaussian channels acting on one bosonic mode can be classified according to the action of the group of Gaussian unitaries. We look for bounds on the classical capacity for channels belonging to such a classification.
Amosov G   +24 more
core   +1 more source

Unimodality of the Betti numbers for Hamiltonian circle actions with index-increasing moment maps [PDF]

open access: yes, 2015
The unimodality conjecture posed by Tolman in the conference `Moment maps in Various Geometry" in 2005 states that if (M,w) is a 2n-dimensional smooth compact symplectic manifold equipped with a Hamiltonian circle action with only isolated fixed points ...
Cho, Yunhyung
core  

87th Annual Meeting of the Meteoritical Society 2025: Abstracts

open access: yes
Meteoritics &Planetary Science, Volume 60, Issue S1, Page 30-350, August 2025.
wiley   +1 more source

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