Decay of Solutions to the Korteweg De Vries-Burger Equation and to Parabolic Conservation Laws

We consider the decay of solutions to the Korteweg de Vries-Burger equation (1) u t     +     u u x       +     δ u x x x     −     ε u x x     =     0                 ε > 0 ,         δ > 0 https://s3-euw1-ap-pe-df-pch-content-public-u.s3.eu-west-1.amazonaws.com/9780203745465/59a6af57-aaec-4c6e-b5c4-3edadfc8e8fa/content/eq1199.tif"/>