RT Journal Article T1 A Poincare Formula for the Fixed Point Indices of the Iterates of Arbitrary Planar Homeomorphisms A1 Romero Ruiz del Portal, Francisco A1 Salazar, J. M. AB 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. PB Hindawi Publishing Coporation SN 1687-1820 YR 2010 FD 2010 LK https://hdl.handle.net/20.500.14352/42536 UL https://hdl.handle.net/20.500.14352/42536 LA eng NO Dedicated to professor José M. Montesinos in the occasion of his 65th birthday and to the memory of professor Julián Martínez. NO MICINN DS Docta Complutense RD 20 abr 2025