Results 1 to 10 of about 1,445,125 (331)
Almost Periodic Solutions of First-Order Ordinary Differential Equations [PDF]
Mathematics, 2018 Approaches to estimate the number of almost periodic solutions of ordinary differential equations are considered. Conditions that allow determination for both upper and lower bounds for these solutions are found.
Seifedine Kadry +3 more
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Smectic Liquid Crystals: Materials with One-dimensional, Periodic Order [PDF]
, 2006 Smectic liquid crystals are materials formed by stacking deformable, fluid layers. Though smectics prefer to have flat, uniformly-spaced layers, boundary conditions can impose curvature on the layers. Since the layer spacing and curvature are intertwined,
Randall D. Kamien +1 more
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Investigation for periodic and almost periodic solutions of first-order ordinary differential equations [PDF]
E3S Web of Conferences, 2023 Approaches to estimating for the number of periodic and almost periodic solutions of ordinary differential equations are considered. Conditions that allow determinating both the upper and lower bounds for these solutions are found.
Alferov G., Ivanov G., Korolev V.
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The Curled Up Dimension in Quasicrystals
Crystals, 2021 Most quasicrystals can be generated by the cut-and-project method from higher dimensional parent lattices. In doing so they lose the periodic order their parent lattice possess, replaced with aperiodic order, due to the irrationality of the projection ...
Fang Fang, Richard Clawson, Klee Irwin
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MULTIPLICATIVE ORDER OF GAUSS PERIODS [PDF]
International Journal of Number Theory, 2010 We obtain a lower bound on the multiplicative order of Gauss periods which generate normal bases over finite fields. This bound improves the previous bound of von zur Gathen and Shparlinski.
Ahmadi, Omran +2 more
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Periodic Third-Order Problems with a Parameter
Axioms, 2021 This work concerns with the solvability of third-order periodic fully problems with a weighted parameter, where the nonlinearity must verify only a local monotone condition and no periodic, coercivity or super or sublinearity restrictions are assumed, as
Feliz Minhós, Nuno Oliveira
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Periodic Ordered Permutation Groups and Cyclic Orderings
Journal of Combinatorial Theory, Series B, 1995 It is shown that periodic ordered permutation groups satisfying certain extra conditions are very nearly simple. This is applied to several natural examples, such as the following. (i) If \(z\) denotes the map \(x \mapsto x + 1\) on \(\mathbb{R}\), and \(\text{Diff}(\mathbb{R})\) is the group of diffeomorphisms of \(\mathbb{R}\), then \(C_{\text{Diff}(\
Droste, M., Giraudet, M., Macpherson, D.
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Periodic solutions of higher order systems [PDF]
Pacific Journal of Mathematics, 1979 where u, g, and / are Λ-vectors. We will establish the existence of T-periodic solutions to (1.1) for large classes of nonlinearities g and forcing terms /. In particular we include cases where g is bounded, sublinear, or superlinear in u9 with arbitrary growth in the other arguments of g in the latter case.
Bates, P. W., Ward, J. R.
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New periodic orbits in the solar sail three-body problem [PDF]
, 2011 We identify displaced periodic orbits in the circular restricted three-body problem, wher the third (small) body is a solar sail. In particular, we consider solar sail orbits in the earth-sun system which are high above the exliptic plane.
C.R. McInnes +7 more
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Weighted Fractional-Order Transform Based on Periodic Matrix
Mathematics, 2021 Tao et al. proposed the definition of the linear summation of fractional-order matrices based on the theory of Yeh and Pei. This definition was further extended and applied to image encryption. In this paper, we propose a reformulation of the definitions
Tieyu Zhao, Yingying Chi
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