“…It is well known that the single viscoelastic wave equation of the form with initial and boundary conditions, where Ω ⊂ R n is bounded domains with a smooth boundary ∂ Ω, has been extensively studied and many results concerning existence, nonexistence, exponential decay and blow-up in finite time have been proved (see [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15] and references therein).…”