Periodic solutions near an equilibrium of a differential equation with a first integral
A multiplicity result for a system of real integral equations by use of the Nielsen number
We prove an existence and multiplicity result for solutions of a nonlinear Urysohn type equation (2.14) by use of the Nielsen and degree theory in an annulus in the function space.
Homotopical dynamics.
An -equivariant degree and the Fuller index
Positive oriented periodic solutions of the first-order complex ODE with polynomial nonlinear part.
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