“…Considering the Dirichlet and Neumann boundary condition for ( u , d ) in dimension one, Ding et al . obtained the existence and uniqueness of global classical solutions with the initial data ( ρ 0 , u 0 , d 0 ) ∈ C 1, α ( I ) × C 2, α ( I ) × C 2, α ( I ) and the initial density away from vacuum, where I = [0,1]. They also addressed both the existence and the uniqueness of global strong solutions for 0 ≤ ρ 0 ∈ H 1 ( I ) and ( u 0 , d 0 ) ∈ H 1 ( I ) × H 2 ( I ).…”