a; bÂ¿0, associated with initial and Dirichlet boundary conditions. We prove, under suitable conditions on ; ; m; p and for negative initial energy, a global non-existence theorem. This improves aâ€¦ (More)

In this paper we consider a Timoshenko system with viscoelastic boundary conditions localized on a part of the boundary. For a wider class of relaxation functions, we establish a more general decayâ€¦ (More)

In this work we consider an initial boundary value problem related to the equation ut âˆ’ âˆ†u + âˆ« t 0 g(t âˆ’ s)âˆ†u(x, s)ds = |u|pâˆ’2u and prove, under suitable conditions on g and p, a blow-up result forâ€¦ (More)

In this paper, we consider the wave equation with a weak internal constant delay term: uâ€²â€²(x, t)âˆ’ âˆ†xu(x, t) + Î¼1(t) uâ€²(x, t) + Î¼2(t) uâ€²(x, tâˆ’ Ï„) = 0 in a bounded domain. Under appropriate conditionsâ€¦ (More)

In this work we consider an initial boundary value problem related to the equation ut âˆ’ div (|âˆ‡u|mâˆ’2âˆ‡u) = f (u) and prove, under suitable conditions on f, a blow up result for solutions withâ€¦ (More)