On directional convexity

Directional Convexity Measure for Binary Tomography

Beküldte Németh Gábor 2. k, 2014-07-22 14:55 Tasi T [1], Nyúl LG [2], Balázs P [3]. Directional Convexity Measure for Binary Tomography [4]. In: Sanniti di Baja G [5], Ruiz-Shulcloper J [6], editors. Progress in Pattern Recognition, Image Analysis, Computer Vision, and Applications. Berlin; Heidelberg: Springer Verlag; 2013. 9. p. 9-16p. Doktori iskola elfogadás: igen Válogatott publikáció: ige...

An algorithm for detecting Directional Quasi–Convexity

Directional Quasi–Convexity (DQC) is a sufficient condition for Nekhoroshev stability, that is, stability for finite but very long times, of elliptic equilibria of Hamiltonian systems. The numerical detection of DQC is elementary for system with three degrees of freedom. In this article, we propose a recursive algorithm to test DQC in any number n ≥ 4 of degrees of freedom.

A Measure of Directional Convexity Inspired by Binary Tomography

On difference sequence spaces defined by Orlicz functions without convexity

In this paper, we first define spaces of single difference sequences defined by a sequence of Orlicz functions without convexity and investigate their properties. Then we extend this idea to spaces of double sequences and present a new matrix theoretic approach construction of such double sequence spaces.  

Some Results on Convexity and Concavity of Multivariate Copulas

This paper provides some results on different types of convexity and concavity in the class of multivariate copulas. We also study their properties and provide several examples to illustrate our results.