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A simple model of chemical kinetics with two concentrations u and v can be formulated as a system of two parabolic variational inequalities with reaction rates v(p) and u(q) for te diffusion processes of u and v, respectively. It is shown that i[...]texto impreso
Consider the initial-boundary value problem for ut=?u-?u(q) with ?> 0, 0texto impreso
The tape head interaction in magnetic recording is modelled by a coupled system of a second order differential equation for the pressure and a fourth-order differential equation for the tape deflection. There is also the constraint that the spac[...]texto impreso
The initial value problem for the equation (?2 / ?t2 ? ?2 / ?x2) ?T / ?t = (? ?2 / ?t ? ?2 / ?x2) eT, ?> 1, is considered. It is proved that under some restrictions on the initial data there is a curve, denoted by t=??(x), which is positive, [...]texto impreso
In this paper we consider a nonlinear system of differential equations consisting of one parabolic equation and one ordinary differential equation. The system arises in chemotaxis, a process whereby living organisms respond to chemical substance[...]
