215 citations · 3.3k across the 98 of their papers we have counts for
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Topology and Fragility in Cosmology
M. J. Reboucas, R. K. Tavakol, A. F. F. Teixeira
We introduce the notion of topological fragility and briefly discuss some examples from the literature. An important example of this type of fragility is the way globally anisotrop…
Non-normal parameter blowout bifurcation: an example in a truncated mean field dynamo model
Eurico Covas, Peter Ashwin, Reza Tavakol
We examine global dynamics and bifurcations occurring in a truncated model of a stellar mean field dynamo. This model has symmetry-forced invariant subspaces for the dynamics and w…
Axisymmetric mean field dynamos with dynamic and algebraic --quenchings
Eurico Covas, Reza Tavakol, Andrew Tworkowski +1
We study axisymmetric mean field spherical and spherical shell dynamo models, with both dynamic and algebraic --quenchings. Our results show that there are qualitative as well a…
Crisis-induced intermittency in truncated mean field dynamos
Eurico Covas, Reza Tavakol
We investigate the detailed dynamics of a truncated dynamo model with a dynamic effect. We find the presence of multiple attractors, including two chaotic attractors with…
Robustness of truncated alpha-Omega dynamos with a dynamic alpha
Eurico Covas, Andrew Tworkowski, Reza Tavakol +1
In a recent work (Covas et al. 1997), the behaviour and the robustness of truncated dynamos with a dynamic were studied with respect to a number of changes in the driving…
Dynamos with different formulations of a dynamic alpha-effect
Eurico Covas, Andrew Tworkowski, Axel Brandenburg +1
We investigate the behaviour of dynamos with a dynamic , whose evolution is governed by the imbalance between a driving and a damping term. We focus on truncated versions o…