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On the independence of strain invariants of two preferred direction nonlinear elasticity
(Elsevier, 2015)
It is often assumed in the literature that the nine classical strain invariants, which are used to characterize the strain energy of a compressible anisotropic elastic solid with two preferred non-orthogonal directions are ...
Invariant cones and convex sets for bilinear control systems and parabolic type of semigroups
(Springer/plenum PublishersNew YorkEUA, 2006)
The Sigma invariants of Thompson's group F
(European Mathematical SocZurichSuíça, 2010)
On the formation of hidden chaotic attractors and nested invariant tori in the Sprott A system
(2017-04-01)
We consider the well-known Sprott A system, which depends on a single real parameter a and, for a= 1 , was shown to present a hidden chaotic attractor. We study the formation of hidden chaotic attractors as well as the ...
Learning how to extract rotation-invariant and scale-invariant features from texture images
(Scopus, 2008)
Learning how to extract texture features from noncontrolled environments characterized by distorted images is a still-open task. By using a new rotation-invariant and scale-invariant image descriptor based on steerable ...
A third-order curvature invariant in static spacetimes
(Iop Publishing LtdBristolInglaterra, 2007)
Finding invariant tori in the problem of a periodically corrugated waveguide
(Sociedade Brasileira de Física, 2008-03-01)
Some dynamic properties for a light ray suffering specular reflections inside a periodically corrugated waveguide are studied. The dynamics of the model is described in terms of a two dimensional nonlinear area preserving ...