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1

Approximate controllability of the impulsive semilinear heat equation

Leiva H., Merentes N.

Journal of Mathematics and Applications

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2015

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Vol. 38

85--104

EN

In this paper we apply Rothe's Fixed Point Theorem to prove the interior approximate controllability of the following semilinear impulsive Heat Equation [...] where k = 1, 2, . . . , p, Ω is a bounded domain in [...] is an open nonempty subset of Ω, 1ω denotes the characteristic function of the set ω, the distributed control u belongs to [...]. Under this condition we prove the following statement: For all open nonempty subsets ω of Ω the system is approximately controllable on [0, τ]. Moreover, we could exhibit a sequence of controls steering the nonlinear system from an initial state z0 to an ϵ neighborhood of the nal state z1 at time τ > 0.

2

Approximate controllability of semilinear impulsive strongly damped wave equation

Larez H., Leiva H., Rebaza J., Rios A.

Journal of Applied Analysis

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2015

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Vol. 21, nr 1

45--57

EN

Rothe’s fixed-point theorem is applied to prove the interior approximate controllability of a semilinear impulsive strongly damped wave equation with Dirichlet boundary conditions in the space Z1/2 = D((-Δ)1/2) × L2(Ω), where Ω is a bounded domain in Rn (n ≥ 1). Under some conditions we prove the following statement: For all open nonempty subsets ω of Ω the system is approximately controllable on [0, τ]. Moreover, we exhibit a sequence of controls steering the nonlinear system from an initial state z0 to a neighborhood of the final state z1 at time τ > 0.

3

Controllability of the semilinear Benjamin-Bona-Mahony equation

Leiva H., Merentes N., Sanchez J. L.

Journal of Mathematics and Applications

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2012

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Vol. 35

39--51

EN

In this paper we prove the interior approximate controllability of the following Generalized Semilinear Benjamin-Bona-Mahony type equation (BBM) with homogeneous Dirichlet boundary conditions [formula/wzor] where a ≥ 0 and b > 0 are constans, Ω is a domain in IRN, ω is an open nonempty subset of Ω, 1ω denotes the characteristic function of the set ω, the distributed control u belongs to L2(0, τ;L2(Ω)) and the nonlinear function ƒ:[0, τ] x IR x IR → IR is smooth enough and there are c, d, e ∈ IR, with c ≠ -1, ea + b > 0 such that [formula/wzor] where Qr = [0, τ] x IR x IR. We prove that for all τ > 0 and any nonempty open subset ω of Ω the system the system is approximately controllable on [0, τ]. Moreover, we exhibit a sequence of controls steering the system from an initial state z0 to an ε-neighborhood of the final state z1 on time > 0. As a consequence of this result we obtain the interior approximate controllability of the semilinear heat equation by putting a = 0 and b = 1.

4

Interior controllability of the Benjamin-Bona-Mahony equation

Leiva H., Merentes N., Sanchez J.

Journal of Mathematics and Applications

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2010

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Vol. 33

51-59

EN

In this paper we prove the interior approximate controllability of the following Generalized Benjamin-Bona-Mahony type equation (BBM) with homogeneous Dirichlet boundary conditions [formula/wzór] where a(mniejszy-równy) and b > 0 are constants, Ω is a domain in IR(N), ω is an open nonempty subset of Ω denotes the characteristic function of the set ω and the distributed control [formula/wzór]. We prove that for all r>0 and any nonempty open subset ω of Ω the system is approximately controllable on [0, r]. Moreover, we exhibit a sequence of controls steering the system from an initial state to a final state in a prefixed time. As a consequence of this result we obtain the interior approximate controllability of the heat equation by putting a = 0 and b = 1.

5

Functions of two variables with bounded φ-variation in the sense of Riesz

Aziz W., Leiva H., Merentes N., Sánchez J. L.

Journal of Mathematics and Applications

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2010

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Vol. 32

5-23

EN

In this paper we introduce the concept of bounded φ- variation function, in the sense of Riesz, dened in a rectangle [wzór]. We prove that the linear space [wzór] generated by the class [wzór] of all φ-bounded variation functions is a Banach algebra. Moreover, we give necessary and sucient conditions for the Nemytskii operator acting in the space [wzór] to be globally Lipschitz.

6

A Representation Theorem for '-Bounded Variation of Functions in the Sense of Riesz

Aziz W., Leiva H., Merentes N., Rzepka B.

Commentationes Mathematicae

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2010

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Vol. 50, [Z] 2

109-120

EN

In this paper we extend the well known Riesz lemma to the class of bounded φ-variation functions in the sense of Riesz defined on a rectangle [...].This concept was introduced in [2], where the authors proved that the space [...] of such functions is a Banach Algebra. Moreover, they characterized also the Nemytskii operator acting in this space. Thus our result creates a continuation of the paper [2].