“…where(y 0 k ) 1≤k≤n ∈ L 2 (0, 1) n , T > 0 fixed, Q := (0, T ) × (0, 1), the coupling terms b kj = b kj (t, x) ∈ L ∞ (Q) (1 ≤ k, j ≤ n) and the function a is a diffusion coefficient which degenerates at 0 (i.e., a(0) = 0) and which can be either weakly degenerate (WD), i.e., a ∈ C([0, 1]) ∩ C 1 ((0, 1]), a(0) = 0, a > 0 in (0, 1], ∃α ∈ [0, 1), such that xa (x) ≤ αa(x), ∀x ∈ [0, 1], (2) or strongly degenerate (SD), i.e.,…”