We consider the Cauchy problem for a system of 2n balance laws which arises from the modelling of multi-component chromatography: This model describes a liquid owing with unit speed over a solid bed. Several chemical substances are partly dissolved in the liquid, partly deposited on the solid bed. Their concentrations are represented respectively by the vectors u = (u 1 We show that, if the initial data have small total variation, then the solution of (1) remains with small variation for all… CONTINUE READING