Existence of almost-periodic ultra-weak solutions to the equation $u^{\prime }(t) = a(t) Au(t) + f(t)$ in Hilbert spaces

Samuel Zaidman

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An analogue of the argument theorem of Bohr and its application

Wojciech Chojnacki (1984)

Studia Mathematica

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Almost periodic solutions with a prescribed spectrum of systems of linear and quasilinear differential equations with almost periodic coefficients and constant time lag (Cauchy integral)

Alexandr Fischer (1999)

Mathematica Bohemica

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This paper generalizes earlier author's results where the linear and quasilinear equations with constant coefficients were treated. Here the method of limit passages and a fixed-point theorem is used for the linear and quasilinear equations with almost periodic coefficients.

Approximation of almost periodic functions by periodic ones

Alexander Fischer (1998)

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It is not the purpose of this paper to construct approximations but to establish a class of almost periodic functions which can be approximated, with an arbitrarily prescribed accuracy, by continuous periodic functions uniformly on $ℝ = (- \infty; + \infty)$ .

Multiple periodic solutions for a discrete time model of plankton allelopathy.

Zhang, Jianbao, Fang, Hui (2006)

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Some remarks on $L^{2}$ -valued functions

S. Zaidman (1973)

Rendiconti del Seminario Matematico della Università di Padova

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Displaying similar documents to “Existence of almost-periodic ultra-weak solutions to the equation u ' ( t ) = a ( t ) A u ( t ) + f ( t ) in Hilbert spaces”

An analogue of the argument theorem of Bohr and its application

Almost periodic solutions with a prescribed spectrum of systems of linear and quasilinear differential equations with almost periodic coefficients and constant time lag (Cauchy integral)

Approximation of almost periodic functions by periodic ones

Multiple periodic solutions for a discrete time model of plankton allelopathy.

Some remarks on L 2 -valued functions

Displaying similar documents to “Existence of almost-periodic ultra-weak solutions to the equation $u^{'} (t) = a (t) A u (t) + f (t)$ in Hilbert spaces”

Some remarks on $L^{2}$ -valued functions