Cufí Cabré, ClaraFontich, Ernest, 1955-2022-02-242022-10-312021-101078-0947https://hdl.handle.net/2445/183479We consider a map $F$ of class $C^{r}$ with a fixed point of parabolic type whose differential is not diagonalizable, and we study the existence and regularity of the invariant manifolds associated with the fixed point using the parameterization method. Concretely, we show that under suitable conditions on the coefficients of $F$, there exist invariant curves of class $C^{r}$ away from the fixed point, and that they are analytic when $F$ is analytic. The differentiability result is obtained as an application of the fiber contraction theorem. We also provide an algorithm to compute an approximation of a parameterization of the invariant curves and a normal form of the restricted dynamics of $F$ on them.38 p.application/pdfeng(c) American Institute of Mathematical Sciences (AIMS), 2021Sistemes dinàmics diferenciablesVarietats diferenciablesDifferentiable dynamical systemsDifferentiable manifoldsinfo:eu-repo/semantics/article7201582022-02-24info:eu-repo/semantics/openAccess