Romero Ruiz del Portal, FranciscoSalazar, J. M.2023-06-202023-06-2020101687-182010.1155/2010/323069https://hdl.handle.net/20.500.14352/42536Dedicated to professor José M. Montesinos in the occasion of his 65th birthday and to the memory of professor Julián Martínez.Let U subset of R(2) be an open subset and f : U -> R(2) be an arbitrary local homeomorphism with Fix(f) = {p}. We compute the fixed point indices of the iterates of f at p, i(R2)(f(k), p), and we identify these indices in dynamical terms. Therefore, we obtain a sort of Poincare index formula without differentiability assumptions. Our techniques apply equally to both orientation preserving and orientation reversing homeomorphisms. We present some new results, especially in the orientation reversing case.engjournal articlehttp://www.emis.de/journals/HOA/FPTA/Volume2010/323069.pdfopen access517.9515.1Ecuaciones diferencialesTopología1202.07 Ecuaciones en Diferencias1210 Topología