#### Filter Results:

- Full text PDF available (21)

#### Publication Year

1996

2015

- This year (0)
- Last 5 years (9)
- Last 10 years (12)

#### Publication Type

#### Co-author

#### Journals and Conferences

#### Key Phrases

Learn More

The existence of smooth families of Lorenz maps exhibiting all possible dynamical behavior is established and the structure of the parameter space of these families is described. Institute of Mathematical Sciences, SUNY at Stony Brook, Stony Brook, NY 11794-3651. IMPA, Estrada Dona Castorina 110, 22460-320 Rio de Janeiro, Brazil.

It will be shown that the smooth conjugacy class of an S−unimodal map which does not have a periodic attractor neither a Cantor attractor is determined by the multipliers of the periodic orbits. This generalizes a result by M.Shub and D.Sullivan for smooth expanding maps of the circle. Institute for Mathematical Sciences, SUNY at Stony Brook, Stony Brook,… (More)

- W. de Melo
- 1998

If two smooth unimodal maps or real analytic critical circle maps have the same bounded combinatorial type then there exists a C 1+ diieomorphism conjugating the two maps along the corresponding critical orbits for some > 0. The proof is based on a detailed understanding of the orbit structure of an innnite dimensional dynamical system: the renormal-ization… (More)

- W D Melo, L A Prudencio, +4 authors A A de Paola
- Arquivos brasileiros de cardiologia
- 1998

PURPOSE
To study the angiographic anatomy of human coronary veins and the possibility of epicardial venous mapping through microelectrode catheters.
METHODS
We evaluated 30 patients with sustained ventricular tachycardia using a catheter which provided occlusion of the coronary sinus ostium during venous angiography. They were 25 males, 5 females, ages… (More)

- A A de Paola, W D Melo, M Z Távora, E E Martinez
- Heart
- 1998

OBJECTIVE
To study the value of epicardial mapping through the coronary venous system in patients with sustained ventricular tachycardia.
DESIGN
20 consecutive patients with sustained ventricular tachycardia who were candidates for radiofrequency ablation.
SETTING
Electrophysiological laboratory.
INTERVENTIONS
Coronary venous angiography was performed… (More)

We prove that any two real-analytic critical circle maps with cubic critical point and the same irrational rotation number of bounded type are C conjugate for some α > 0.

In this paper we extend M. Lyubich’s recent results on the global hyperbolicity of renormalization of quadratic-like germs to the space of Cr unimodal maps with quadratic critical point. We show that in this space the boundedtype limit sets of the renormalization operator have an invariant hyperbolic structure provided r ≥ 2 + α with α close to one. As an… (More)

We prove that two C critical circle maps with the same rotation number of bounded type are C conjugate for some α > 0 provided their successive renormalizations converge together at an exponential rate in the C sense. The number α depends only on the rate of convergence. We also give examples of C∞ critical circle maps with the same rotation number that are… (More)

- Alejandro Kocsard, Welington de Melo, Marcelo Viana, Viviane Baladi, Carlos Gustavo Moreira
- 2008

Given a smooth vector field X on a closed orientable d-manifold M , many questions about the dynamics of its induced flow can be studied analyzing the following cohomological equation: LXu = ξ, where ξ is a given real function on M , u : M → R is the solution that we look for (in a certain regularity class) and LX is the Lie derivative in the X direction.… (More)