Periodic Korovkin Theorem via $P_{p}^{2}$-Statistical $\mathcal{A}$-Summation Process by Kamil Demirci, Fadime Dirik, Sevda Yıldız

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Space of Quasi-Periodic Limit Functions and Its Applications by Rui Xie, Zhinan Xia, Junwei Liu

Subjects: “…asymptotically quasi-periodic functions…”
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A new theorem on exponential stability of periodic evolution families on Banach spaces by Constantin Buse, Oprea Jitianu

Subjects: “…Almost periodic functions…”
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Dos algoritmos para estimar el periodo de una señal discreta by José Danilo Rairán Antolines

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Clarkson’s Inequalities for Periodic Sobolev Space by I.V. Korytov

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Exact Values of Bernstein <inline-formula> <graphic file="1029-242X-2008-894529-i1.gif"/></inline-formula>-Widths for Some Classes of Periodic Functions with Formal Self-Adjoint Linear Differential Operators by Guo Feng

“…<p>Abstract</p> <p>We consider the classes of periodic functions with formal self-adjoint linear differential operators <inline-formula> <graphic file="1029-242X-2008-894529-i2.gif"/></inline-formula>, which include the classical Sobolev class as its special case. …”
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Almost periodic skew-symmetric differential systems by Michal Veselý

Subjects: “…almost periodic functions…”
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Multi-dimensional (ω, c)-almost periodic type functions and applications by Kostić M.

Subjects: “…multi-dimensional (ω,c)-almost periodic functions…”
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Almost periodic solutions of $N$-th order neutral differential difference equations with piecewise constant arguments by Rong-Kun Zhuang

Subjects: “…almost periodic functions…”
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Generalized Almost Periodicity in Lebesgue Spaces with Variable Exponents, Part II by Marko Kostić, Wei-Shih Du

Subjects: “…quasi-asymptotically almost periodic functions with variable exponents…”
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Quantum Walks in Hilbert Space of Lévy Matrices: Recurrences and Revivals by Alexander Iomin

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Generalized Almost Periodicity in Lebesgue Spaces with Variable Exponents by Marko Kostić, Wei-Shih Du

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The Current Spectrum Formation of a Non-Periodic Signal: A Differential Approach by Sergey Sokolov, Daniil Marshakov, Arthur Novikov

Subjects: “…spectrum of non-periodic functions…”
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Generalized <i>ρ</i>-Almost Periodic Sequences and Applications by Marko Kostić, Belkacem Chaouchi, Wei-Shih Du, Daniel Velinov

Subjects: “…generalized <i>ρ</i>-almost periodic function…”
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To recovering of continuous function by its sequences of Fejer sums at given set of points by Александр Григорьевич Качуровский, Иван Викторович Подвигин

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On the degree of approximation of Fourier series based on a certain class of product deferred summability means by Bidu Bhusan Jena, Susanta Kumar Paikray, M. Mursaleen

Subjects: “…Fourier series of arbitrary periodic functions…”
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The Use of Trigonometric Series for the Study of Isotropic Beam Deflection by Adrian Ioan Botean

“…Thus, in this paper, the expression of the average deformed fiber is defined in advance, then it is considered an infinite sum of sinusoidal functions that are successively evaluated using sinusoidal trigonometric series if it is considered a periodic function, or using Fourier series if it is considered a non-periodic function. …”
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Analysis of a free boundary problem modeling spherically symmetric tumor growth with angiogenesis and a periodic supply of nutrients by Shihe Xu, Meng Bai

“…The results show that when the nutrient concentration exceeds a certain value and c is sufficiently small, the solutions of the model can be arbitrarily close to the unique periodic function as t → ∞ $t\rightarrow\infty$ .…”
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Periodic Duffing equations with delay by Jean-Marc Belley, Michel Virgilio

“…Assuming a priori bounds on the mean of a $T$-periodic function $p$, we show that the Duffing equation $$ x''(t) +cx'(t) +g(t-au,x(t-au), x'(t-au)) =p(t), $$ with delay $au$, admits a $T$-periodic solution.…”
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Complexité et Log-périodicité des remontées mécaniques pour skieurs by Ivan Brissaud

“…To confirm this universality we present here the appliance of a log periodic function to the succession of ski lift kinds. …”
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