Results 1 to 10 of about 1,447,206 (291)
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.
doaj +1 more source
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
doaj +1 more source
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
openaire +2 more sources
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
doaj +1 more source
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.
openaire +1 more source
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.
openaire +3 more sources
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
doaj +1 more source
Quasi-periodic solutions of the Boomeron equation [PDF]
, 1984 The quasi-periodic solutions for the Boomeron equation are determined by means of function-theoretical methods related to Riemann surfaces and theta functions.
Martini, R., Wesselius, W.
core +5 more sources
THE FOURTH ORDER MIXED PERIODIC RECURRENCE FRACTIONS
Journal of Vasyl Stefanyk Precarpathian National University, 2015 Offered economical algorithm for calculation of rational shortenings of thefourth-order mixed periodic recurrence fraction.
A.V. Semenchuk, R.A. Zatorsky
doaj +1 more source
High order periodic impulsive problems
Dynamical Systems and Differential Equations, AIMS Proceedings 2015 Proceedings of the 10th AIMS International Conference (Madrid, Spain), 2015 zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Minhós, Feliz, Fialho, J
openaire +2 more sources