Birational transformations preserving rational solutions of algebraic ordinary differential equations

In the real case the proof is based on properties of the action of the group of interval exchange transformations on the set of all monic polynomials of some given degree.. Finally

Notice also that, from this point of view, the condition of existence of rational periodic orbits is equivalent to the condition that Q is in the torsion of the group given by

No obstante, como esta enfermedad afecta a cada persona de manera diferente, no todas las opciones de cuidado y tratamiento pueden ser apropiadas para cada individuo.. La forma

For what concerns the first part, in which we focus on the study of the long time behaviour of solutions to reaction-diffusion equations with doubly nonlinear diffusion, we prove

In section 3 we consider continuous changes of variables and their generators in the context of general ordinary differential equations, whereas in sections 4 and 5 we apply

Díaz Soto has raised the point about banning religious garb in the ―public space.‖ He states, ―for example, in most Spanish public Universities, there is a Catholic chapel

teriza por dos factores, que vienen a determinar la especial responsabilidad que incumbe al Tribunal de Justicia en esta materia: de un lado, la inexistencia, en el

It turns out that for linear fields the set of solutions of the equations of motion – that is, the (covariant) phase space of the theory [19, 14] –, when extended, is a