Equation Icon  ( ) ( ) ( ) 1 0 0 1 u1 ut = 0 − 1 ux + 1 0 uy, t ≥ 0, x ≥ 0, y ∈ ℝ, u = u (5.32 ) 2 u(0,x,y ) = f (x,y), x ≥ 0, y ∈ ℝ, (5.33 ) au1 + bu2 = g(t,y), t ≥ 0, y ∈ ℝ, (5.34 )